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M3 Probability option adapted to fit the general birthday problem and other
I would like to start another thread, but in essence it is a continuation of this thread http://community.wolfram.com/groups/-/m/t/208255?p_p_auth=OYun4CSw but would like it to be a main thread too and not get lost in an...
Projectile motion considering a
I would like to simulate the projectile motion, but considering both initial velocity, gravity, drag and a “wind” vector field. My wind is specified by a discrete set of values of position intensity and direction (it can be regular, if easier). I’m currently restricting myself to the 2D...
Can I Plot Multiple 2D Graph Slices as a Single Integrated 3D Graph?
So, okay, here's my quandary, I'm working on a problem and have a solution for the even values I'm concerned with, but not yet for the odd values. What I'd like to do is to graph some range of solutions as individual parts of a 3D graph. Essentially, they'd kind of be 2D cross sections of the...
Cannot convert expression to function
Please look at following picture. Why when I call f[0,0], values of variables x and y were not replaced by 0 and 0??? Still x, y in there
How to visualize colored map of 1 country with 5 region?
Hello all, I am a new user WM.could you please help me. I need to create a colored (blue) map of 1 country. and there are 5 regions. color of the map depends from the infomation(on the left side i need to put 4 check boxes(column B,C,D,E)), which will be selected from excel file. and this...
How to input an equation with implicit variables?
I want to input an equation, to be solved later in combination with many other equations, that reads f(q,t) == g(1/t, 1/q), where f and g are some functions of q and t to be determined precisely by the other equations. The problem is, I don't know how to input this equation: if I just use variables...
How to input an equation with implicit variables?
I want to input an equation, to be solved later in combination with many other equations, that reads f(q,t) == g(1/t, 1/q), where f and g are some functions of q and tt to be determined precisely by the other equations. The problem is, I don't know how to input this equation: if I just use...
Fitting a three-Gaussian model on data
Hi! I want to fit a three-Gaussian model on a given data (download-link: http://sharesend.com/6yhykztt). I've tried different inital Number to get the fit to converge. Either the left peak doesn't converge or the peak in the middle doesn't converge. Would be grateful if somebody has some hint or...
vectorplot3D stuck
Hi guys, I am trying to plot the following functio as a vector field in 3D Piecewise[{{{(3*z*(1 - z^2/(x^2 + y^2 + z^2))*Log[ro/ri]* Sin[\[Phi][x, y, z]])/(4*Sqrt[x^2 + y^2 + z^2]), (3/4)*(1 - z^2/(x^2 + y^2 +...
Revolving a region about the x-axis
Hi, everyone, I have the next problem, let R be region bounded by y = 12-x^3 and y=12-4x, find the volume generated by revolving R about x-axis, what interests me is to rotate about the x axis, the next intersection[mcode]Plot[{12 - x^3, 12 - 4 x}, {x, -2, 2}, Filling -> {1 -> {{2}, Yellow}}] ...
Optimize Function Module using NMinimize
I defined a simulation as a module with simulation parameters as the variables. I want to find optimal simulation parameters using NMinimize method. I noticed that my simulation module will run successfully for any sample parameters, but when used in NMinimize will not execute. Please see below a...
How to show steps in Wolfram Mathematica?
Hello everybody.Can Wolfram Mathematica software show steps and not only solution, for ex of this problem: http://s4.postimg.org/vsp9vu9m5/Untitled.png Greetings from Montenegro :)
Amount of liquid in a tank that isn't level
Hello, This is my the first time here. How can I calulate the amount of liquid in a fuel oil tank if the tank is not level? Looking down from the top of the tank there is an x and y axis. The x axis is running the length of the tank and the y is front to back. At one end I have a sensor measuring...
Dictionaries missing?
I've tried to use some of the examples on http://reference.wolfram.com/language/ref/DictionaryLookup.html, but get an error message: In[1]:= DictionaryLookup["abb" ~~ ___] ReadList::nffil: File not found during...
CUDALink functions hang
Hello, I'm trying to use the application CUDALink, First: I load Needs["CUDALink`"] and O.K., but after, when I try to use CUDAInformation[] or another function, I don´t get an answer, Mathematica remains thinking indefinitely. Where is CUDALink? . I use Mathematica 9.0.1.0 HomeEdition + Win...
Another information rich programming language...
Hello, Have you seen this: http://channel9.msdn.com/posts/Tomas-Petricek-How-F-Learned-to-Stop-Worrying-and-Love-the-Data The idea is much the same as Wolfram Language, to real-time compile...
How to find the probability for two people who have the same birthday among
Here is the problem. Please write down it using the mathematica. How to find the probability for two people who have the same birthday among the 100 people? Firt we have 365 days for a year, then we random select 2 people from 100, and see what is the probability. I am a newer for mathematica,...
Logging Input and Output in a text-based interface of Wolfram language
Although I am using Mathematica 9 notebook usually, I am interested in the logging input and output in a text-based interface of Wolfram Language. I found a package of SessionLog.m in Programming Mathematica written by Roman Maeder. [code]$cat SessionLog.m (* ::Package:: *)...
Understanding the use of Slot (#)
Dear, Could you explain me how does the slot works in the command bellow? I also show the complete code lower. This code is from http://demonstrations.wolfram.com/CubicEquation/.nb file. The "Download Author Code »(preview »)" is wrong and I had to get the code from the .nb file. ...
Meaning of three vertical dots between factors in a Notebook line of output
In a long output whose lines consist of products of circular functions and variable names, three vertical dots sometimes appear between variable names and a Cos[ ] or Sin[ ]. The occurence appears to be random as I can detect no systematic constraint on their location. E.g. K (three dots in a...
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