# All Questions

552 views

### Fitting data to an ARProcess using FindProcessParameters

I have 50 data points that I would like to represent as an AR(4) process. I'd like to over-plot the behaivor of the estimated process model with that of the original (raw) data before I use the model ...
468 views

### Using the symbol I for electrical current [duplicate]

I would like to use the I as a symbol for the electrical current. How can I redefine it, so it is not interpreted as the imaginary unity?
104 views

### How can I find the row differences of a matrix?

How can I compute the row differences of an m x n matrix to obtain an m-1 x n matrix; that is, given how do I obtain
574 views

### 3 hour calculation? ParallelMap & ParallelTable

I'm having some problems with slow Mathematica code... I'm basically doing a computation that's is expected to take 3 hours (!) in my Core i7 with 4 processors... I'm basically computing an index (of ...
51 views

### How to ContourPlot a Table? [duplicate]

Possible Duplicate: Why is ContourPlot not displaying this curve? Why do I have to put Evaluate[] here I'm trying to plot certain contours of a function $f:\mathbb R^2\to\mathbb R$. What I ...
169 views

### Expectation of CauchyDistribution

I've noticed this strange behavior and I'm wondering if it's a bug. I define a Cauchy distribution: c = CauchyDistribution[0, 1]; If I evaluate ...
201 views

### How can I align the labels of the buttons on a setter bar to the button centers?

I tried to align the labels on the buttons of a SetterBarto the button centers. This is my code: ...
2k views

### Lyapunov Exponent

Does anyone know a (simple) Mathematica code for computing the Lyuponov Exponent for the Rossler System? Thank you Rossler System: ...
120 views

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666 views

### Making a movie with specific frame-rate out of ListPlot outputs? [duplicate]

Possible Duplicate: Is it possible to prerender animation in Wolfram Mathematica? Does Mathematica support variable frame rate for any video format, in analogue of GIF-style “DisplayDurations”? ...
243 views

### System Identification with large Input/Output Data

I have some questions about system identification. I made some measurement of current step (input) and voltage response(output) and I want to fine the parameters of my impedance. The sample rate is ...
210 views

### mysql insert set problem

I need some help. ...
438 views

### How to stop Animate animation when reaching a defined value

I have following code Animate[ Plot[myvariable x,{x,0,100} ], {myvariable,0.1,1},AnimationRunning->If[myvariable==1,False,True] ] How do I make the animation ...
1k views

I want to create a two-dimensional plot using data from an external file. This file contains several triplets of numbers. The first two columns indicate the x and y position, while the third one works ...
337 views

When I do ...
388 views

### Creating a notebook that has cells of a certain style password protected

I am teaching students how to use Mathematica. I want to create a problem set that has cells with a certain style (probably Input or some new style that is a variant of Input) locked down so that the ...
674 views

### Composing two functions in Mathematica [duplicate]

Possible Duplicate: Composition of mappings not working as expected I am new to Mathematica and I am having trouble defining a certain composition of functions. Let ...
478 views

### How to improve these WASD + mouse look 3D controls?

Insipred by this question and the corresponding answer I've written a code for full-screen exploration of 3D scenes using standard WASD and mouse look controls. Here it is. ...
736 views

### Why does ImageData need four times more memory?

Background We are dealing with very large TIFF image files that are imported, processed and exported using Mathematica 9.0.1. Many of our algorithms only work with an array representation of the ...
494 views

### How can I highlight a moving bar in an animation of a bar chart?

I wrote the following code, but I don't know how to highlight the moving bar. ...
455 views

### Display function value on hover?

I have used Manipulate in conjunction with Plot to draw a function's graph and I would like to show the current x-axis value and function value while hovering over the function's plot. How can I ...
271 views

### Show does not combine the plots

i've the following problem: because it's not possible to plot complex numbers (or is it?) i created my own "function": ...
157 views

### Why does Evaluate[a[[1]]]=0 assign a value to a variable while a[[1]]=0 doesn't?

I'm trying to do a small page counter with Mathematica, for leting me know about my reading progress on some books. I'm stuck on a problem: ...
563 views

### How to copy code out of notebook to an external text editor without extra line feeds being added?

I am simply trying to copy code from a cell (input cell) in a notebook, to paste the code into a plain text editor, and not have some lines wrap in the middle. I need to copy the code, as is, to a ...
154 views

### Function to preserve evaluation on display?

I'm looking for a function that applies the following behavior to an expression: -When the expression is given as the full input, or as part of a function that cannot be evaluated, it remains in ...
145 views

### Using NSolve on an equation that involves Mean and TruncatedDistribution

What I would like to do is create a mixture distribution that has a specified mean by varying one parameter in the distribution. To do this I've written the following code; ...
683 views

### Changing the inter-item spacing in Legends (version 9 and up)

The legending functionality in versions 9 and higher is much easier to use than the PlotLegends package and other bespoke ways of creating legends in earlier ...
264 views

### How can I improve my code with efficient mathematica built-in functions?

I have written a module for my assignment like below. V[n + 1] = rk[x[n], y[n] ,z[n], V[n]]; vs = V[n].V[n+1]; V[n + 1] = I want to modify it with efficient ...
170 views

### Is it possible to embed a notebook as a panel in a java GUI?

I'd like to create a GUI that displays a tree, some text boxes, buttons, and then as a panel, a fully-functional notebook. Is that possible?
100 views

### How can I set ScriptLevel to be 0 for inline math mode?

I hate small integral signs and thus I like ScriptLevel to be 0. I have set ScriptLevel to be 0 for Text cells, DisplayFormula, and InlineFormula. When in a text cell I press ctrl+( to create an ...
460 views

### How do I make a frequency heatmap?

I have an array of data that has repeats in it. I want to generate a heatmap depending on how much repetition each point has, as in how many times it is repeated.
206 views

### Plotting partial sums and its Cesàro means

I have the function as shown in the first line of the code and its partial sum in the second line of the code below. ...
117 views

### Symbolic solution to ODE, pure InverseFunction not evaluated

I'm new to Mathematica and I don't understand why in the solution of the following ODE, the #1 in the pure function is not immediately replaced by the corresponding ...
1k views

### Problem with transparency when I export an eps file

I have the following simple Mathematica code: ...
969 views

### How to expand a function into a power series with negative powers?

Is there any way to expand this expression a+b(1-Exp[-T/(b c)]/(z-Exp[-T/ (b c)]) (where a, ...
686 views

### defining recursively a function with multiple if conditions

I am trying to recursively define a function which satisfies the following system of equations and which depends on two parameters $n$ and $l$,  \begin{align} A(x, n, l) &= F[ A(x,n-1,l) ]\\ ...
243 views

### Row inside FrameLabel doesn't work in Mathematica 9

So as to automate/customize plot titles I use Row inside e.g. FrameLabel: FrameLabel -> {"x", "y", Row[...]} Now with ...
114 views

### Pattern matching not going over a list when using default values

if I execute the following command in Mathematica: {a,a^2,a^3}/.a^(n_:1)->b^(2 n) Mathematica returns: {b^2,b^4,b^6} ...
385 views

### Non-linear scaled X axis in DateListPlot

I have a lot of plots like this in Mathematica: And I would like to transform it in something like that: Where the information between 0 and 7 hours and 18 and 00 hour is "compressed" in the ...
381 views

### Problem printing what appears in my notebook

I have created a dashboard that looks fine on my screen and fits onto my screen at 100% magnification on Mathematica. When I try printing it, no matter what printing environment I use, I can not get ...
162 views

### What Cell Option Controls Group Indentation?

I am working on a stylesheet for a handout I am making and I want to make my own "definition" box format. So I use the "Format"->"Edit Stylesheet" menu option and get the stylesheet inspector. I then ...
527 views

### Using PlotLegends with a numeric PointSize

Using PlotLegends with a PlotStyle containing (for instance) PointSize[0.02] creates a ...
194 views

### How to override ?NumericQ

I have a function myFunc which I is to be displayed cleanly if arguments are symbolic, but which can also be numerically evaluated. I do this by defining a ...
368 views

### Obsolete Signal Processing functions

I need some tools to detect the fundamental frequency and pitch of a sound. I Googled for "pitch detect" and found some .nb files that do these tasks, but all the files are in Mathematica 3.0 format. ...
768 views

### Plotting a 3D sphere i.e. how to vizualise the spanned volume $\int_0^{2\pi}\int_0^{\pi} d\theta d\phi$?

I am trying to help this guy here to vizualise the integration volume. How can I plot the different integrals ie a ball and the ball adjusted by a trigonometric function? Integrals needing visual ...
147 views

### RecurrenceTable with vector

Mathematica can do a RecurrenceTable with a vector, here is a simple example: RecurrenceTable[{x[n + 1] == 2* x[n], x[0] == {1, 2, 3}}, x, {n, 3}] with output ...
348 views

### Map over list of functions

I would like to convert a list of $n$ complex equations to a list of $2n$ real ones. At the moment I am doing it like this: ...
635 views

### Plotting a graph with conditions

I am a newbie in Mathematica and is currently using Mathematica v9.0. I would like to consult if anyone knows how can I plot a given functions with conditions as shown below on how they look like. ...