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plot2d.c
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3868 lines (3424 loc) · 124 KB
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/* GNUPLOT - plot2d.c */
/*[
* Copyright 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
#include "gp_types.h"
#include "plot2d.h"
#include "alloc.h"
#include "axis.h"
#include "command.h"
#include "datafile.h"
#include "datablock.h"
#include "encoding.h"
#include "eval.h"
#include "fit.h"
#include "graphics.h"
#include "interpol.h"
#include "misc.h"
#include "parse.h"
#include "pm3d.h" /* for is_plot_with_palette */
#include "setshow.h"
#include "tables.h"
#include "tabulate.h"
#include "term_api.h"
#include "util.h"
#include "variable.h" /* For locale handling */
#ifndef _WIN32
# include "help.h"
#endif
/* minimum size of points[] in curve_points */
#define MIN_CRV_POINTS 100
/* static prototypes */
static struct curve_points * cp_alloc(int num);
static int get_data(struct curve_points *);
static void store2d_point(struct curve_points *, int i, double x, double y, double xlow, double xhigh, double ylow, double yhigh, double width);
static void eval_plots(void);
static void parametric_fixup(struct curve_points * start_plot, int *plot_num);
static void box_range_fiddling(struct curve_points *plot);
static void boxplot_range_fiddling(struct curve_points *plot);
static void spiderplot_range_fiddling(struct curve_points *plot);
static void histogram_range_fiddling(struct curve_points *plot);
static void impulse_range_fiddling(struct curve_points *plot);
static void parallel_range_fiddling(struct curve_points *plot);
static int check_or_add_boxplot_factor(struct curve_points *plot, char* string, double x);
static void add_tics_boxplot_factors(struct curve_points *plot);
static void parse_kdensity_options(struct curve_points *this_plot);
/* internal and external variables */
/* the curves/surfaces of the plot */
struct curve_points *first_plot = NULL;
static struct udft_entry plot_func;
static double histogram_rightmost = 0.0; /* Highest x-coord of histogram so far */
static text_label histogram_title; /* Subtitle for this histogram */
static int stack_count = 0; /* counter for stackheight */
static struct coordinate *stackheight = NULL; /* Scratch space for y autoscale */
static int paxis_start, paxis_end, paxis_current; /* PARALLELPLOT bookkeeping */
/* function implementations */
/*
* cp_alloc() allocates a curve_points structure that can hold 'num'
* points. Initialize all fields to NULL.
*/
static struct curve_points *
cp_alloc(int num)
{
struct curve_points *cp;
struct lp_style_type default_lp_properties = DEFAULT_LP_STYLE_TYPE;
cp = (struct curve_points *) gp_alloc(sizeof(struct curve_points), "curve");
memset(cp,0,sizeof(struct curve_points));
cp->p_max = (num >= 0 ? num : 0);
if (num > 0)
cp->points = (struct coordinate *)
gp_alloc(num * sizeof(struct coordinate), "curve points");
/* Initialize various fields */
cp->lp_properties = default_lp_properties;
default_arrow_style(&(cp->arrow_properties));
cp->fill_properties = default_fillstyle;
cp->filledcurves_options = filledcurves_opts_data;
return (cp);
}
/*
* cp_extend() reallocates a curve_points structure to hold "num"
* points. This will either expand or shrink the storage.
*/
void
cp_extend(struct curve_points *cp, int num)
{
if (num == cp->p_max)
return;
if (num > 0) {
cp->points = gp_realloc(cp->points, num * sizeof(cp->points[0]),
"expanding 2D points");
if (cp->varcolor)
cp->varcolor = gp_realloc(cp->varcolor, num * sizeof(double),
"expanding curve variable colors");
cp->p_max = num;
cp->p_max -= 1; /* Set trigger point for reallocation ahead of */
/* true end in case two slots are used at once */
/* (e.g. redundant final point of closed curve) */
} else {
/* FIXME: Does this ever happen? Should it call cp_free() instead? */
free(cp->points);
cp->points = NULL;
cp->p_max = 0;
free(cp->varcolor);
cp->varcolor = NULL;
if (cp->labels)
free_labels(cp->labels);
cp->labels = NULL;
}
}
/*
* cp_free() releases any memory which was previously malloc()'d to hold
* curve points (and recursively down the linked list).
*/
void
cp_free(struct curve_points *cp)
{
while (cp) {
struct curve_points *next = cp->next;
free(cp->title);
cp->title = NULL;
free(cp->title_position);
cp->title_position = NULL;
free(cp->points);
cp->points = NULL;
free(cp->varcolor);
cp->varcolor = NULL;
if (cp->labels)
free_labels(cp->labels);
cp->labels = NULL;
free(cp);
cp = next;
}
}
/*
* In the parametric case we can say plot [a= -4:4] [-2:2] [-1:1] sin(a),a**2
* while in the non-parametric case we would say only plot [b= -2:2] [-1:1]
* sin(b)
*/
void
plotrequest()
{
int dummy_token = 0;
AXIS_INDEX axis;
if (!term) /* unknown */
int_error(c_token, "use 'set term' to set terminal type first");
is_3d_plot = FALSE;
if (parametric && strcmp(set_dummy_var[0], "u") == 0)
strcpy(set_dummy_var[0], "t");
/* initialize the arrays from the 'set' scalars */
axis_init(&axis_array[FIRST_X_AXIS], FALSE);
axis_init(&axis_array[FIRST_Y_AXIS], TRUE);
axis_init(&axis_array[SECOND_X_AXIS], FALSE);
axis_init(&axis_array[SECOND_Y_AXIS], TRUE);
axis_init(&axis_array[T_AXIS], FALSE);
axis_init(&axis_array[U_AXIS], FALSE);
axis_init(&axis_array[V_AXIS], FALSE);
axis_init(&axis_array[POLAR_AXIS], TRUE);
axis_init(&axis_array[COLOR_AXIS], TRUE);
/* Always be prepared to restore the autoscaled values on "refresh"
* Dima Kogan April 2018
*/
for (axis = 0; axis < NUMBER_OF_MAIN_VISIBLE_AXES; axis++) {
AXIS *this_axis = &axis_array[axis];
if (this_axis->set_autoscale != AUTOSCALE_NONE)
this_axis->range_flags |= RANGE_WRITEBACK;
}
/* Nonlinear mapping of x or y via linkage to a hidden primary axis. */
/* The user set autoscale for the visible axis; apply it also to the hidden axis. */
for (axis = 0; axis < NUMBER_OF_MAIN_VISIBLE_AXES; axis++) {
AXIS *secondary = &axis_array[axis];
if (axis == SAMPLE_AXIS)
continue;
if (secondary->linked_to_primary
&& secondary->linked_to_primary->index == -secondary->index) {
AXIS *primary = secondary->linked_to_primary;
primary->set_autoscale = secondary->set_autoscale;
axis_init(primary, 1);
}
}
/* If we are called from a mouse zoom operation we should ignore */
/* any range limits because otherwise the zoom won't zoom. */
if (inside_zoom) {
while (equals(c_token,"["))
parse_skip_range();
}
/* Range limits for the entire plot are optional but must be given */
/* in a fixed order. The keyword 'sample' terminates range parsing. */
if (parametric || polar) {
dummy_token = parse_range(T_AXIS);
parse_range(FIRST_X_AXIS);
} else {
dummy_token = parse_range(FIRST_X_AXIS);
}
parse_range(FIRST_Y_AXIS);
parse_range(SECOND_X_AXIS);
parse_range(SECOND_Y_AXIS);
if (equals(c_token,"sample") && equals(c_token+1,"["))
c_token++;
/* Clear out any tick labels read from data files in previous plot */
for (axis=0; axis<AXIS_ARRAY_SIZE; axis++) {
struct ticdef *ticdef = &axis_array[axis].ticdef;
if (ticdef->def.user)
ticdef->def.user = prune_dataticks(ticdef->def.user);
if (!ticdef->def.user && ticdef->type == TIC_USER)
ticdef->type = TIC_COMPUTED;
}
for (axis=0; axis<num_parallel_axes; axis++) {
struct ticdef *ticdef = ¶llel_axis_array[axis].ticdef;
if (ticdef->def.user)
ticdef->def.user = prune_dataticks(ticdef->def.user);
if (!ticdef->def.user && ticdef->type == TIC_USER)
ticdef->type = TIC_COMPUTED;
}
/* use the default dummy variable unless changed */
if (dummy_token > 0)
copy_str(c_dummy_var[0], dummy_token, MAX_ID_LEN);
else
strcpy(c_dummy_var[0], set_dummy_var[0]);
eval_plots();
}
/* Helper function for refresh command. Reexamine each data point and update the
* flags for INRANGE/OUTRANGE/UNDEFINED based on the current limits for that axis.
* Normally the axis limits are already known at this point. But if the user has
* forced "set autoscale" since the previous plot or refresh, we need to reset the
* axis limits and try to approximate the full auto-scaling behaviour.
*/
void
refresh_bounds(struct curve_points *first_plot, int nplots)
{
struct curve_points *this_plot = first_plot;
int iplot; /* plot index */
for (iplot = 0; iplot < nplots; iplot++, this_plot = this_plot->next) {
int i; /* point index */
struct axis *x_axis = &axis_array[this_plot->x_axis];
struct axis *y_axis = &axis_array[this_plot->y_axis];
/* IMAGE clipping is done elsewhere, so we don't need INRANGE/OUTRANGE checks */
if (this_plot->plot_style == IMAGE || this_plot->plot_style == RGBIMAGE) {
if (x_axis->set_autoscale || y_axis->set_autoscale)
process_image(this_plot, IMG_UPDATE_AXES);
continue;
}
for (i=0; i<this_plot->p_count; i++) {
struct coordinate *point = &this_plot->points[i];
if (point->type == UNDEFINED)
continue;
else
point->type = INRANGE;
/* This autoscaling logic is identical to that in
* refresh_3dbounds() in plot3d.c
*/
if (!this_plot->noautoscale) {
autoscale_one_point(x_axis, point->x);
if (this_plot->plot_style & PLOT_STYLE_HAS_VECTOR)
autoscale_one_point(x_axis, point->xhigh);
}
if (!inrange(point->x, x_axis->min, x_axis->max)) {
point->type = OUTRANGE;
continue;
}
if (!this_plot->noautoscale) {
autoscale_one_point(y_axis, point->y);
if (this_plot->plot_style == VECTOR)
autoscale_one_point(y_axis, point->yhigh);
}
if (!inrange(point->y, y_axis->min, y_axis->max)) {
point->type = OUTRANGE;
continue;
}
}
if (this_plot->plot_style == BOXES || this_plot->plot_style == IMPULSES)
impulse_range_fiddling(this_plot);
}
this_plot = first_plot;
for (iplot = 0; iplot < nplots; iplot++, this_plot = this_plot->next) {
/* handle 'reverse' ranges */
axis_check_range( this_plot->x_axis );
axis_check_range( this_plot->y_axis );
/* Make sure the bounds are reasonable, and tweak them if they aren't */
axis_checked_extend_empty_range(this_plot->x_axis, NULL);
axis_checked_extend_empty_range(this_plot->y_axis, NULL);
}
}
/* current_plot->token is after datafile spec, for error reporting
* it will later be moved past title/with/linetype/pointtype
*/
static int
get_data(struct curve_points *current_plot)
{
int i /* num. points ! */ , j;
int ngood;
int max_cols, min_cols; /* allowed range of column numbers */
struct coordinate *cp;
double v[MAXDATACOLS];
memset(v, 0, sizeof(v));
if (current_plot->varcolor == NULL) {
TBOOLEAN variable_color = FALSE;
if ((current_plot->lp_properties.pm3d_color.type == TC_RGB)
&& (current_plot->lp_properties.pm3d_color.value < 0))
variable_color = TRUE;
if (current_plot->lp_properties.pm3d_color.type == TC_Z)
variable_color = TRUE;
if (current_plot->lp_properties.l_type == LT_COLORFROMCOLUMN)
variable_color = TRUE;
if (current_plot->plot_smooth != SMOOTH_NONE
&& current_plot->plot_smooth != SMOOTH_ZSORT) {
/* FIXME: It would be possible to support smooth cspline lc palette */
/* but it would require expanding and interpolating plot->varcolor */
/* in parallel with the y values. */
variable_color = FALSE;
}
if (variable_color) {
current_plot->varcolor = gp_alloc(current_plot->p_max * sizeof(double),
"varcolor array");
}
}
/* eval_plots has already opened file */
/* HBB 2000504: For most 2D plot styles the 'z' coordinate is unused.
* Set it to NO_AXIS to account for that. For styles that use
* the z coordinate as a real coordinate (i.e. not a width or
* 'delta' component, change the setting inside the switch: */
current_plot->z_axis = NO_AXIS;
/* HBB NEW 20060427: if there's only one, explicit using column,
* it's y data. df_axis[] has to reflect that, so df_readline()
* will expect time/date input. */
if (df_no_use_specs == 1)
df_axis[0] = df_axis[1];
switch (current_plot->plot_style) { /* set maximum columns to scan */
case XYERRORLINES:
case XYERRORBARS:
case BOXXYERROR:
min_cols = 4;
max_cols = 7;
if (df_no_use_specs >= 6) {
/* HBB 20060427: signal 3rd and 4th column are absolute x
* data --- needed so time/date parsing works */
df_axis[2] = df_axis[3] = df_axis[0];
/* and 5th and 6th are absolute y data */
df_axis[4] = df_axis[5] = df_axis[1];
}
break;
case FINANCEBARS:
/* HBB 20000504: use 'z' coordinate for y-axis quantity */
current_plot->z_axis = current_plot->y_axis;
min_cols = 5;
max_cols = 6;
/* HBB 20060427: signal 3rd and 4th column are absolute y data
* --- needed so time/date parsing works */
df_axis[2] = df_axis[3] = df_axis[4] = df_axis[1];
break;
case BOXPLOT:
min_cols = 2; /* fixed x, lots of y data points */
max_cols = 4; /* optional width, optional factor */
expect_string( 4 );
break;
case CANDLESTICKS:
current_plot->z_axis = current_plot->y_axis;
min_cols = 5;
max_cols = 7;
df_axis[2] = df_axis[3] = df_axis[4] = df_axis[1];
break;
case BOXERROR:
min_cols = 3;
max_cols = 6;
/* There are four possible cases: */
/* 3 cols --> (x,y,dy), auto dx */
/* 4 cols, boxwidth==-2 --> (x,y,ylow,yhigh), auto dx */
/* 4 cols, boxwidth!=-2 --> (x,y,dy,dx) */
/* 5 cols --> (x,y,ylow,yhigh,dx) */
/* In each case an additional column may hold variable color */
if ((df_no_use_specs == 4 && boxwidth == -2)
|| df_no_use_specs >= 5)
/* HBB 20060427: signal 3rd and 4th column are absolute y
* data --- needed so time/date parsing works */
df_axis[2] = df_axis[3] = df_axis[1];
break;
case VECTOR: /* x, y, dx, dy, variable color or arrow style */
case ARROWS: /* x, y, len, ang, variable color or arrow style */
min_cols = 4;
max_cols = 5;
break;
case XERRORLINES:
case XERRORBARS:
min_cols = 3;
max_cols = 5;
if (df_no_use_specs >= 4)
/* HBB 20060427: signal 3rd and 4th column are absolute x
* data --- needed so time/date parsing works */
df_axis[2] = df_axis[3] = df_axis[0];
break;
case YERRORLINES:
case YERRORBARS:
min_cols = 2;
max_cols = 5;
if (df_no_use_specs >= 4)
/* HBB 20060427: signal 3rd and 4th column are absolute y
* data --- needed so time/date parsing works */
df_axis[2] = df_axis[3] = df_axis[1];
break;
case HISTOGRAMS:
min_cols = 1;
max_cols = 3;
break;
case BOXES:
min_cols = 1;
max_cols = 4;
break;
case FILLEDCURVES:
min_cols = 1;
max_cols = 3;
df_axis[2] = df_axis[1]; /* Both curves use same y axis */
break;
case IMPULSES: /* 2 + possible variable color */
case POLYGONS:
case LINES:
case DOTS:
min_cols = 1;
max_cols = 3;
break;
case LABELPOINTS:
/* 3 column data: X Y Label */
/* extra columns allow variable pointsize, pointtype, and/or rotation */
min_cols = 3;
max_cols = 6;
expect_string( 3 );
break;
case IMAGE:
min_cols = 3;
max_cols = 3;
break;
case RGBIMAGE:
min_cols = 3;
max_cols = 6;
break;
case RGBA_IMAGE:
min_cols = 3;
max_cols = 6;
break;
case CIRCLES: /* 3 + possible variable color, or 5 + possible variable color */
min_cols = 2;
max_cols = 6;
break;
case ELLIPSES:
min_cols = 2; /* x, y, major axis, minor axis */
max_cols = 6; /* + optional angle, possible variable color */
break;
case POINTSTYLE:
case LINESPOINTS:
/* 1 column: y coordinate only */
/* 2 columns x and y coordinates */
/* Allow 1 extra column because of 'pointsize variable' */
/* Allow 1 extra column because of 'pointtype variable' */
/* Allow 1 extra column because of 'lc rgb variable' */
min_cols = 1;
max_cols = 5;
break;
case PARALLELPLOT:
case SPIDERPLOT:
/* 1 column: y coordinate only */
/* extra columns for variable color, pointtype, etc */
min_cols = 1;
max_cols = 4;
break;
case TABLESTYLE:
min_cols = 1;
max_cols = MAXDATACOLS;
break;
default:
min_cols = 1;
max_cols = 2;
break;
}
/* Restictions on plots with "smooth" option */
switch (current_plot->plot_smooth) {
case SMOOTH_NONE:
break;
case SMOOTH_ZSORT:
min_cols = 3;
if (current_plot->plot_style != POINTSTYLE)
int_error(NO_CARET, "'smooth zsort' only possible in plots 'with points'");
break;
case SMOOTH_ACSPLINES:
max_cols = 3;
break;
default:
if (df_no_use_specs > 2)
int_warn(NO_CARET, "extra columns ignored by smoothing option");
break;
}
/* May 2013 - Treating timedata columns as strings allows
* functions column(N) and column("HEADER") to work on time data.
* Sep 2014: But the column count is wrong for HISTOGRAMS
*/
if (current_plot->plot_style != HISTOGRAMS) {
if (axis_array[current_plot->x_axis].datatype == DT_TIMEDATE)
expect_string(1);
if (axis_array[current_plot->y_axis].datatype == DT_TIMEDATE)
expect_string(2);
}
if (df_no_use_specs > max_cols)
int_error(NO_CARET, "Too many using specs for this style");
if (df_no_use_specs > 0 && df_no_use_specs < min_cols)
int_error(NO_CARET, "Not enough columns for this style");
i = 0; ngood = 0;
/* If the user has set an explicit locale for numeric input, apply it */
/* here so that it affects data fields read from the input file. */
set_numeric_locale();
/* Initial state */
df_warn_on_missing_columnheader = TRUE;
while ((j = df_readline(v, max_cols)) != DF_EOF) {
if (i >= current_plot->p_max) {
/* overflow about to occur. Extend size of points[]
* array. Double the size, and add 1000 points, to avoid
* needlessly small steps. */
cp_extend(current_plot, i + i + 1000);
}
/* Assume range is OK; we will check later */
current_plot->points[i].type = (j == 0) ? UNDEFINED : INRANGE;
/* First handle all the special cases (j <= 0) */
switch (j) {
case 0:
df_close();
int_error(current_plot->token, "Bad data on line %d of file %s",
df_line_number, df_filename ? df_filename : "");
continue;
case DF_UNDEFINED:
/* Version 5 - We are now trying to pass back all available info even
* if one of the requested columns was missing or undefined.
*/
current_plot->points[i].type = UNDEFINED;
if (missing_val && !strcmp(missing_val, "NaN")) {
j = DF_MISSING;
/* fall through to short-circuit for missing data */
} else {
j = df_no_use_specs;
break;
/* continue with normal processing for this line */
}
case DF_MISSING:
/* Plot type specific handling of missing points goes here. */
if ((current_plot->plot_style == PARALLELPLOT)
|| (current_plot->plot_style == SPIDERPLOT)) {
current_plot->points[i].type = UNDEFINED;
j = df_no_use_specs;
break;
}
if (current_plot->plot_style == HISTOGRAMS) {
current_plot->points[i].type = UNDEFINED;
i++;
}
continue;
case DF_FIRST_BLANK:
/* The binary input routines generate DF_FIRST_BLANK at the end
* of scan lines, so that the data may be used for the isometric
* splots. Rather than turning that off inside the binary
* reading routine based upon the plot mode, DF_FIRST_BLANK is
* ignored for certain plot types requiring 3D coordinates in
* MODE_PLOT.
*/
if (current_plot->plot_style == IMAGE
|| current_plot->plot_style == RGBIMAGE
|| current_plot->plot_style == RGBA_IMAGE)
continue;
/* make type of next point undefined, but recognizable */
current_plot->points[i] = blank_data_line;
i++;
continue;
case DF_SECOND_BLANK:
/* second blank line. We dont do anything
* (we did everything when we got FIRST one)
*/
continue;
case DF_FOUND_KEY_TITLE:
df_set_key_title(current_plot);
continue;
case DF_KEY_TITLE_MISSING:
fprintf(stderr,"get_data: key title not found in requested column\n");
continue;
case DF_COLUMN_HEADERS:
continue;
default:
if (j < 0) {
df_close();
int_error(c_token,
"internal error : df_readline returned %d : datafile line %d",
j, df_line_number);
}
break; /* Not continue!! */
}
/* We now know that j > 0, i.e. there is some data on this input line */
ngood++;
/* "plot ... with table" bypasses all the column interpretation */
if (current_plot->plot_style == TABLESTYLE) {
tabulate_one_line(v, df_strings, j);
continue;
}
/* June 2010 - New mechanism for variable color */
/* If variable color is requested, take the color value from the */
/* final column of input and decrement the column count by one. */
if (current_plot->varcolor) {
static char *errmsg = "Not enough columns for variable color";
switch (current_plot->plot_style) {
case CANDLESTICKS:
case FINANCEBARS:
if (j < 6) int_error(NO_CARET,errmsg);
break;
case XYERRORLINES:
case XYERRORBARS:
case BOXXYERROR:
if (j != 7 && j != 5) int_error(NO_CARET,errmsg);
break;
case VECTOR:
case ARROWS:
if (j < 5) int_error(NO_CARET,errmsg);
break;
case LABELPOINTS:
case BOXERROR:
case XERRORLINES:
case XERRORBARS:
case YERRORLINES:
case YERRORBARS:
if (j < 4) int_error(NO_CARET,errmsg);
break;
case CIRCLES:
if (j == 5 || j < 3) int_error(NO_CARET,errmsg);
break;
case ELLIPSES:
case BOXES:
case POINTSTYLE:
case LINESPOINTS:
case IMPULSES:
case LINES:
case DOTS:
if (j < 3) int_error(NO_CARET,errmsg);
break;
case PARALLELPLOT:
case SPIDERPLOT:
if (j < 1) int_error(NO_CARET,errmsg);
break;
case BOXPLOT:
/* Only the key sample uses this value */
v[j++] = current_plot->base_linetype + 1;
break;
default:
break;
}
current_plot->varcolor[i] = v[--j];
}
/* Unusual special cases */
/* In spiderplots the implicit "x coordinate" v[0] is really the axis number. */
/* Add this at the front and shift all other using specs to the right. */
if (spiderplot) {
int is;
for (is=j++; is>0; is--)
v[is] = v[is-1];
v[0] = paxis_current;
}
/* Single data value - is it y with implicit x or something else? */
if (j == 1 && !(current_plot->plot_style == HISTOGRAMS)) {
if (default_smooth_weight(current_plot->plot_smooth))
v[1] = 1.0;
else {
v[1] = v[0];
v[0] = df_datum;
}
j = 2;
}
/* May 2018: The huge switch statement below is now organized by plot */
/* style. Each plot style can have its own understanding of what the */
/* value in a particular field of the "using" specifier represents. */
/* E.g. the 3rd field might be z or radius or color. */
switch (current_plot->plot_style) {
case LINES:
case DOTS:
case IMPULSES:
{ /* x y [acspline weight] */
coordval w; /* only for (current_plot->plot_smooth == SMOOTH_ACSPLINES) */
w = (j > 2) ? v[2] : 1.0;
store2d_point(current_plot, i++, v[0], v[1],
v[0], v[0], v[1], v[1], w);
break;
}
case POINTSTYLE:
case LINESPOINTS:
{ /* x y {z} {var_ps} {var_pt} {lc variable} */
/* NB: assumes CRD_PTSIZE == xlow CRD_PTTYPE == xhigh CRD_PTCHAR == ylow */
int var = 2; /* column number for next variable spec */
coordval weight = (current_plot->plot_smooth == SMOOTH_ACSPLINES) ? v[2] : 1.0;
coordval var_ps = current_plot->lp_properties.p_size;
coordval var_pt = current_plot->lp_properties.p_type;
coordval var_char = 0;
if (current_plot->plot_smooth == SMOOTH_ZSORT)
weight = v[var++];
if (var_pt == PT_VARIABLE) {
if (isnan(v[var]) && df_tokens[var]) {
safe_strncpy( (char *)(&var_char), df_tokens[var], sizeof(coordval));
truncate_to_one_utf8_char((char *)(&var_char));
}
var_pt = v[var++];
}
if (var_ps == PTSZ_VARIABLE)
var_ps = v[var++];
if (var > j)
int_error(NO_CARET, "Not enough using specs");
if (var_pt < 0)
var_pt = 0;
store2d_point(current_plot, i++, v[0], v[1],
var_ps, var_pt, var_char, v[1], weight);
break;
}
case LABELPOINTS:
{ /* x y string {rotate variable}
* {point {pt variable} {ps variable}}
* {tc|lc variable}
*/
int var = 3; /* column number for next variable spec */
coordval var_rotation = current_plot->labels->rotate;
coordval var_ps = current_plot->labels->lp_properties.p_size;
coordval var_pt = current_plot->labels->lp_properties.p_type;
if (current_plot->labels->tag == VARIABLE_ROTATE_LABEL_TAG)
var_rotation = v[var++];
if (var_pt == PT_VARIABLE)
var_pt = v[var++];
if (var_ps == PTSZ_VARIABLE)
var_ps = v[var++];
if (var > j)
int_error(NO_CARET, "Not enough using specs");
store2d_point(current_plot, i, v[0], v[1],
var_ps, var_pt, var_rotation, v[1], 0.0);
/* Allocate and fill in a text_label structure to match it */
if (current_plot->points[i].type != UNDEFINED) {
store_label(current_plot->labels, &(current_plot->points[i]),
i, df_tokens[2],
current_plot->varcolor ? current_plot->varcolor[i] : 0.0);
}
i++;
break;
}
case STEPS:
case FSTEPS:
case FILLSTEPS:
case HISTEPS:
{ /* x y */
store2d_point(current_plot, i++, v[0], v[1],
v[0], v[0], v[1], v[1], -1.0);
break;
}
case CANDLESTICKS:
case FINANCEBARS:
{ /* x yopen ylow yhigh yclose [xhigh] */
coordval yopen = v[1];
coordval ylow = v[2];
coordval yhigh = v[3];
coordval yclose = v[4];
coordval xlow = v[0];
coordval xhigh = v[0];
/* NB: plot_c_bars will set xhigh = xlow + 2*(x-xlow) */
if (j > 5 && v[5] > 0)
xlow = v[0] - v[5]/2.;
store2d_point(current_plot, i++, v[0], yopen,
xlow, xhigh, ylow, yhigh, yclose);
break;
}
case XERRORLINES:
case XERRORBARS:
{ /* x y xdelta or x y xlow xhigh */
coordval xlow = (j > 3) ? v[2] : v[0] - v[2];
coordval xhigh = (j > 3) ? v[3] : v[0] + v[2];
store2d_point(current_plot, i++, v[0], v[1],
xlow, xhigh, v[1], v[1], 0.0);
break;
}
case YERRORLINES:
case YERRORBARS:
{ /* x y ydelta or x y ylow yhigh */
coordval ylow = (j > 3) ? v[2] : v[1] - v[2];
coordval yhigh = (j > 3) ? v[3] : v[1] + v[2];
store2d_point(current_plot, i++, v[0], v[1],
v[0], v[0], ylow, yhigh, -1.0);
break;
}
case BOXERROR:
{ /* 3 columns: x y ydelta
* 4 columns: x y ydelta xdelta (boxwidth != -2)
* 4 columns: x y ylow yhigh (boxwidth == -2)
* 5 columns: x y ylow yhigh xdelta
*/
coordval xlow, xhigh, ylow, yhigh, width;
if (j == 3) {
xlow = v[0];
xhigh = v[0];
ylow = v[1] - v[2];
yhigh = v[1] + v[2];
width = -1.0;
} else if (j == 4) {
xlow = (boxwidth == -2) ? v[0] : v[0] - v[3]/2.;
xhigh = (boxwidth == -2) ? v[0] : v[0] + v[3]/2.;
ylow = (boxwidth == -2) ? v[2] : v[1] - v[2];
yhigh = (boxwidth == -2) ? v[3] : v[1] + v[2];
width = (boxwidth == -2) ? -1.0 : 0.0;
} else {
xlow = v[0] - v[4]/2.;
xhigh = v[0] + v[4]/2.;
ylow = v[2];
yhigh = v[3];
width = 0.0;
}
store2d_point(current_plot, i++, v[0], v[1],
xlow, xhigh, ylow, yhigh, width);
break;
}
case XYERRORLINES:
case XYERRORBARS:
case BOXXYERROR:
{ /* 4 columns: x y xdelta ydelta
* 6 columns: x y xlow xhigh ylow yhigh
*/
coordval xlow = (j>5) ? v[2] : v[0] - v[2];
coordval xhigh = (j>5) ? v[3] : v[0] + v[2];
coordval ylow = (j>5) ? v[4] : v[1] - v[3];
coordval yhigh = (j>5) ? v[5] : v[1] + v[3];
store2d_point(current_plot, i++, v[0], v[1],
xlow, xhigh, ylow, yhigh, 0.0);
if (j == 5)
int_error(NO_CARET, "wrong number of columns for this plot style");
break;
}
case BOXES:
{ /* 2 columns: x y (width depends on "set boxwidth")
* 3 columns: x y xdelta
* 4 columns: x y xlow xhigh
*/
coordval xlow = v[0];
coordval xhigh = v[0];
coordval width = 0.0;
double base = axis_array[current_plot->x_axis].base;
if (j == 2) {
/* For boxwidth auto, we cannot calculate xlow/xhigh yet since they
* depend on both adjacent boxes. This is signalled by storing -1
* in point->z to indicate xlow/xhigh must be calculated later.
*/
if (boxwidth > 0 && boxwidth_is_absolute) {
xlow = (axis_array[current_plot->x_axis].log)
? v[0] * pow(base, -boxwidth/2.) : v[0] - boxwidth / 2;
xhigh = (axis_array[current_plot->x_axis].log)
? v[0] * pow(base, boxwidth/2.) : v[0] + boxwidth / 2;
} else {
width = -1.0;
}
} else if (j == 3) {
xlow = v[0] - v[2]/2;
xhigh = v[0] + v[2]/2;
} else if (j == 4) {
xlow = v[2];
xhigh = v[3];