4
votes
2answers
429 views

Wolfram Workbench 2.0 on Xubuntu 14.04 LTS trusty

I'm trying to install Wolfram Workbench on Xubuntu 14.04 but the apptication doesn't start. Knowing that WWb is a 32 bit application, I installed the i386 requrements: ...
4
votes
0answers
122 views

Linearised Einstein equations

I need to compute the linearised Einstein Equations around a fixed metric $$g_{μν}=\text{Minkowski metric} + h_{μν}$$ which is not the flat metric. Does anyone know a Mathematica package or a ...
4
votes
4answers
374 views

How to do memoization together with evaluation of a complicated function

UPDATE 2: much shorter version Given a list of paired indices {i, j}={{1,2}, {3,4}, …}, I need to first evaluate a rather complicated function test[i,j,x] (because ...
4
votes
2answers
99 views

How can I make a stylesheet where inline cells have are styled like input cells?

How can I make a stylesheet where inline cells have are styled like input cells? By "similar", I mean the same font and syntax highlighting. I have even tried copying all settings from ...
4
votes
2answers
195 views

Clicking to add/remove a Locator

I would like to add a Locator to a figure displayed by Manipulate when I click inside the figure, at the location where I click, ...
4
votes
1answer
244 views

workbench: how to see values of global variables during debugging

Consdier the following package ...
4
votes
2answers
574 views

How to transform transfer functions into differential equations?

is there a way with Mathematica to transform transferfunctions (Laplace) into differential equations? Let's say I have the transfer function $\frac{Y(s)}{U(s)}=\text{Kp} \left(\frac{1}{s ...
4
votes
3answers
273 views

Notation package: parenthesis placement for SuperscriptBox

The question concerns the Notation package. I want to define notation for the function very similar to the built-in Power[a,b] ...
4
votes
1answer
630 views

Categorical Distribution

Suppose I want to do calculations with a random variable $X$ that has a simple categorical distribution (a.k.a generalised Bernoulli distribution or discrete distribution). I was expecting to be able ...
4
votes
2answers
77 views

With command does not behave as expected according to its Attributes

The attributes of the With command are HoldAll which means it should not evaluate its arguments before its starts its business. ...
4
votes
2answers
451 views

Recognize simple shapes in an image and color them randomly?

I have an image of polygons built from a polar function (see below). I'd like to color each triangle or quadrilateral a random color. Firstly, I'm not sure how to separate the simple shapes. ...
4
votes
0answers
128 views

Tools for Stability/Automatic Error Analysis in Mathematica

I have a longer analytic expression in several variables containing special functions and others. Does Mathematica bring tools - or are there any packages - to examine the stability when I evaluate ...
4
votes
5answers
522 views

How to plot a 2D region when there are 3 free parameters?

How could I obtain the region of payments, with the parameters a,b,c,d between 0 and 1 and the sum of all equals 1? After the comment/recommendation of belisarius... I edit the original question ...
4
votes
1answer
123 views

Memory usage of timeseries - lists of {Integer32, Real32}

A list of {Integer32, Real32} items in Mathematica seems to use 12-times as much memory than the C equivalent array of structs. ...
4
votes
2answers
466 views

Force Mathematica not to reduce a fraction

I am interested in a function which would stop Mathematica reducing fraction. If my input is 50/100, Mathematica outputs 1/2, I ...
4
votes
1answer
149 views

How to copy groups of cells with NotebookWrite?

I'm trying to use: NotebookWrite[nb, NotebookRead[EvaluationNotebook[]]; to copy cells from the EvaluationNotebook[] to a new ...
4
votes
3answers
283 views

make specific cluster

I have set of coordinates. I want to make clusters in which every point is within 1.5 distance unit of it's neighbor. ex of point coordinates: ...
4
votes
2answers
921 views

Numeric calculation of Hessian

I want to calculate the Hessian matrix for a function that can only be evaluated numerically. So far, I have the following (where f is just for testing): ...
4
votes
1answer
255 views

How to transform a DumpSaved .mx file to .m file conveniently?

I have many DumpSave-d .mx files under a directory. They are generated under Linux. The .mx ...
4
votes
2answers
251 views

Modified Cell Different Display

Is there a way to show maybe a slightly different color, or change the cell bracketing color of a Mathematica cell when it has been modified? Ideally it would be nice to follow the standard of ...
4
votes
1answer
305 views

Dynamic legends involving show

My question is how do I get dynamic legends (legends that turn data on/off) to work with Show? This is an extension of an old question here; How to dynamically toggle curves on/off in a crowded ...
4
votes
1answer
252 views

Where will I put packages?

Recently,I got WebMathematica. Initially I searched WebMathematica documentation in Mathematica documentation, but it doesn't return any results. For this I read tutorials; finally I placed the ...
4
votes
1answer
524 views

Extracting text from nested HTML lists <ul> <li>

We wish to analyze the tree structure of HTML documents that consist of nested lists, ie, using the HTML tags <ul> and ...
4
votes
1answer
331 views

How can I use Manipulate[] to click on a Graphics3D output and generate $(x,y)$ outputs on a projection plane parallel to my screen?

Say I have some Graphics3D object that I'm looking at from a top down perspective, e.g.: ...
4
votes
1answer
402 views

Problem with the Plot of Functions and PlotLegends

For some odd reason the PlotLegends output is not as expected. ...
4
votes
1answer
217 views

Manipulate a Plot that contains a variable that contains symbol [duplicate]

This snippet mm = m Manipulate[{mm, Plot[mm x, {x, 0, 1}]}, {m, 0, 1}] (m is not defined anywhere) produces a sadly fixed ...
4
votes
3answers
187 views

How do I generate a set of n-tuples containing integral solutions to a linear equation provided certain constraints?

Let $m,k,p$ be fixed positive integers. I want to create a table of k-tuples $(x_1,x_2,\ldots,x_k)$ comprised of solutions in positive integers to the equation below: ...
4
votes
1answer
585 views

Exporting a Video of a Simulation of Pendulum Motion

In a series of previous questions, I asked how to solve a series of differential equations describing a series of coupled pendulums, and then how to plot this data by coloring the different pendulums. ...
4
votes
1answer
3k views

Contour Plot in Cylindrical Coordinates

I'm trying to render an equation in the cylindrical coordinates, and I used the following codes: ...
4
votes
1answer
831 views

Connection to remote kernel can not be established - No specific error shown

I was trying to set up a remote kernel using Mathematica 8, a Debian server and a Mac OSX 10.8 client. First I configured a VPN connection between server and client and went through all the basic ...
4
votes
1answer
114 views

How to substitute $x$ in a expression $f(x)$ but not calculate the value of the $f(x)$ at the point $x$?

I want to subtitute $x = 1$ into the expression $$f(x)=x^2 + 3 (x^2 - m^2) + \sqrt{x^2 + 1}$$ but I don't calculate the value $f(1)$, that is mean, I want $$1^2 + 3(1^2-m^2)+\sqrt{1^2 + 1}.$$ If I ...
4
votes
2answers
146 views

Get DownValues that do not involve patterns?

Say I have a function with a few definitions that also implements memoization: f[x_] := f[x] = x^2 f[x_, y_] := f[x, y] = x^2 + y^2 I then apply the function to ...
4
votes
3answers
1k views

BoxWhiskerPlot - how to specify boxes position on the horizontal axis

Let's say I have a folowing set of data: k = 1 : list of values k = 3 : list of values k = 10 : list of values I know that to make a BoxWhiskerChart I have to ...
4
votes
4answers
539 views

Adding Math to Plots

I have several formulas I would like to place at specific coordinates in a Graphics object I have already created. I need to be able to choose bold or not as well ...
4
votes
3answers
3k views

I need to multiply a series of matrices

I need to perform a dot product on a large number of 2 x 2 matrices that I have defined to differ by even/odd subscripts (Ex: D-odd=x but D-even=y). The $\Pi$ function will not work because it does ...
4
votes
3answers
386 views

Extracting Pareto elements from a list

How can I extract the Pareto elements from a list? For example, for that list: ...
4
votes
2answers
940 views

Define a color function based on color samples obtained from ColorBrewer

I am quite new to mathematica and I am searching for a way to create a smooth colormap based on the samples given by http://colorbrewer2.org/ . Is it possible to create a interpolated function from ...
4
votes
2answers
617 views

DisplayFormula not working as expected

How do I use the styles "DisplayFormula" and "DisplayFormulaNumbered"? Why is there no margin (or empty space) around the ...
4
votes
1answer
614 views

Multiple simultaneous events in EventLocator method for NDSolve

I'm using NDSolve to integrate a system of ODEs, and EventLocator to stop the integration when it leaves a certain region in phase space. This works perfectly as it should. However, I've also added ...
4
votes
1answer
831 views

Removing clipping masks from exported PDFs

I usually export graphics from Mathematica as PDFs which I tweak with Adobe Illustrator. When most plots are exported from Mathematica as PDFs they contain a large number of mostly useless clipping ...
4
votes
4answers
928 views

How to change color dynamically?

I am new to Mathematica and want to change the FillingStyle Dynamically in this Plot. I want ...
4
votes
2answers
2k views

A dot appearing after a zero, and making the entries of a matrix into fractions

For more info about the difference between 0. and 0 I am a self-taught Mathematica user and I have some elementary questions-- perhaps too elementary for this site, but here they are. If ...
4
votes
2answers
1k views

GridLines in LogPlot or LogLogPlot

Suppose I have a plot like LogLogPlot[2 x^5/3, {x,0.1,10}, GridLines->Automatic] How can I achieve to get "custom" gridlines to reduce the number of ...
3
votes
2answers
144 views

How to get the frequency information of an mp3 audio?

I have: music = Import["http://www.qlcoder.com/uploads/145425353234642.mp3", "mp3"] Then I get: But what I want to get is ...
3
votes
2answers
125 views

Importing CSV with multiline text fields

Here is a valid CSV: a1,b1,c1,d1,"e1 e1 e1" a2,b2,"c2 c2 c2",d2,e2 It has two rows and five columns, and contains two fields with embedded CRLF. (See the CSV ...
3
votes
2answers
155 views

ListPlot vector 3D circle line

I got a 2D vector with the following code. ...
3
votes
3answers
161 views

How to read the intersect corodinate of two lines from the ListLinePlot?

Suppose I have two curves intersect at some point, how can I read the coordinates from the graph, not read by eye, but find it with more precision by computer. For example, here are two lists created ...
3
votes
2answers
363 views

How do I generate n random numbers with an extra condition [duplicate]

I need to generate n random numbers that would sum into a. And I can't find an elegant solution here: ...
3
votes
3answers
154 views

NDSolve and Plotting

So I am having an issue using NDSolve and plotting the function. So I have two different NDSolve calls in my plotting function. ...
3
votes
2answers
245 views

how can I bold the outline of conic section as the plane intercepts the cone?

Plot3D[{-5 - x - y, -Sqrt[8 x^2 + 8 y^2]}, {x, -5, 5}, {y, -5, 5}, Mesh -> None, BoxRatios -> {1, 1, 1}, PlotLegends -> "Expressions"]

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