All Questions

221 views

C compiler error: the no library could be generated error

I have windows 8, Mathematica 9, and I've just installed Microsoft Visual Studio 2013 with update 3. I'm try to run Compile with the option ...
198 views

Mathematica multi-dimensional numerical integration default method

I'm performing multidimensional Numerical integrations with mathematica I was wondering what was the default method that mathematica was using. Also i'm changing some parameter inside the integration, ...
80 views

Plots are clipped randomly (almost)

I am experiencing a strange behavior in plotting a lot of functions. Basically, they are clipped within an horizontal range. Let try to run this code by varying nmax, it could be a problem of my ...
3k views

How to discretize a nonlinear PDE fast?

I wish to numerically solve the following PDE. Although there are some complete discussions for solving PDEs in tutorial/NDSolvePDE, there is no hint for the nonlinear case by discretization. Thus, I ...
115 views

Manipulating array

I have got an array like this: A = {{{1, 4, 5}, {3, 7, 15}}, {{5, 6, 9}, {7, 8, 2}}, {{9, 10, 1}, {11, 12, 3}}} I make differences in each sublist a following ...
202 views

How does Mathematica use system environment variables?

Is there a common way in which environment variables are accessed, stored, or used by the kernel? There are built-in functions for querying and setting vars in the system environment, but there are ...
43 views

Code/Exp Search Documentation Center Mathematica

I have added several of my own applications to my Mathematica documentation center. Currently Mathematica uses followings notebook options to help the user search for specific functions. ...
211 views

Calculate expected value of piece-wise pdf

I have the following PDF of a random variable: $f(x)=\begin{cases} 1 & \text{if}\ \ \ 0<x<\frac{1}{2} \vee 1 < x < \frac{3}{2}\\ 0 & \text{otherwise}. \end{cases}$ How can i ...
109 views

Right data format when EmpiricalDistribution expects “Rectangular Array”

I have the following code to generate random data (these are the eigenvalues of a non-central Wishart matrix, and I am interested in their distribution). ...
785 views

How can I evaluate only a single step of a recursive function?

Let's say have a simple recursive function for the Fibonacci sequence f[0] := 1 f[1] := 1 f[n_] := f[n - 1] + f[n - 2] but I want to see how it will expand in a ...
237 views

Replace list of symbols in an expression

I have an expression: exp = a+b+c and a list containing all the symbols of my expression: syms = {a,b,c} and I would like ...
250 views

Trying to write out the prime factorization of a number with CenterDot and Superscript

I am trying to use CenterDot and Superscript, in conjunction with Apply to write out the prime factorization of any given integer. Everything works well UNLESS the prime factorization of the number ...
196 views

NMinimize ignores constraints

I have a problem with NMinimize - I try to minimize quite a complicated function and use a couple of constraints (the way it is shown in the documentation). Now, ...
138 views

Exclude Infinite Value in Table

I'm creating a plot of a family of lines using their endpoints and plotting it like so: Graphics[Line[Table[{{x1, y1}, {x2, y2}}, {u, 0, 2 \[Pi], ustep}]]] Where ...
71 views

Suppose that I have f[a_, b_, x_] := ... I'd like to create a list of n pure functions ...
207 views

Simplifying vector expressions

I have some code that calculates Jacobians, but the results contain terms that should simplify or cancel out, but I'm not sure how to achieve this. My code looks like ...
112 views

Zoom settings other than 50% 75% 100%, [duplicate]

Is it possible to choose a zoom setting other than what's provided at the bottom of each Notebook window (50%, 75%, 100%, 125%, 150%, 200%, 300%)?
281 views

Where can I find a good tutorial for stochastic modeling using Mathematica?

I am a newbie in Mathematica and I aim to use Mathematica mostly for stochastic modeling (to develop and analyze models in evolutionary biology). Note that I am not necessarily a great mathematician ...
60 views

How to increase the font size in PlotMakers

When I use PlotMarkers -> {\[FilledCircle], 40} in ListPlot I get something like this: How can I increase the font size of ...
182 views

What is the PDF of a variable where a parameter is itself a random variable?

Question How do we analyze in Mathematica cases where a parameter in a Probability Density Function (PDF) varies according to another PDF? Consider the following example... Example The text below ...
301 views

Change the colour scheme in DensityPlots to make the zero white

We are trying to plot a density plot using the TemperetarueMap colour scheme. However, we don't seem to be able to make the white colour correspond to the value zero of the function we are plotting. ...
834 views

Partial fraction decomposition of $1/(e^x-1)$

This link has discussion on finding partial fraction decomposition of $1/(e^x-1)$, so I experimented with Mathematica to see if M can do it, but looks like not. Similar is the case with one more CAS I ...
7k views

Image processing: Floor plan - detecting rooms' borders (area) and room names' texts

Here is a simple building floor plan. I would like to derive the rooms as (rectangular) components and the names of the rooms. This is very common representation of building floor plans. The ...
51 views

simplifying the range of two definite integrals

Today, I tried to obtain the solution of the following equation, sol = DSolve[ {m v'[t] + \[Gamma] v[t] == \[Xi][t] , v[0] == v0}, v[t], t] The solution, of ...
334 views

Uniform distribution on unit circle

I need a uniform distribution on the unit circle (x; y) : x^2 + y^2 <= 1 with the density f(x) = (2/Pi) Sqrt[1-x^2] ...
234 views

Preventing notebook cells from being broken across two pages when printing

Sometimes I create a number of plots together, e.g. by GraphicsGrid[]. If it happens that I have to print the notebook, very often the cell is broken, half on one ...
151 views

395 views

Why doesn't FullSimplify simplify expressions with DiracDelta?

I want to simplify a complicated expression with some Dirac delta distributions, but FullSimplify does not do what I want. Specifically, I want ...