13
votes
3answers
775 views

How to evaluate the 0/0 type limit in Mathematica?

When I use Limit to evaluate the $k \to 0$ limit of ((k + 2) (α^2 - Sqrt[α^4 + k]) + k)/(α^2 - Sqrt[α^4 + k] + 2 k) If ...
8
votes
3answers
340 views

Can this code be written in a more functional style

Referencing this question, I wonder if the following code can be written more concisely using a functional style, i.e. without For loops or ...
7
votes
5answers
2k views

Notation of partial derivative

I want to write partial derivatives of functions with many arguments. Why is it that when I type f[x,y] ctrl+6 (0,1) it turns out to be bad syntax? The output of ...
8
votes
2answers
362 views

Handling vector comparisons in “Piecewise” function

Is it possible for the Piecewise function to process a vector comparison? For example, my input vector is x={0,1,2,3,4} I would like to define a function that ...
4
votes
4answers
679 views

recursively solve equation and saving the values

I am new to Mathematica. I am trying to recursively solve an equation and saving the values into a Table. Since I need the real solutions only I use ...
12
votes
3answers
600 views

How to determine the convex hull of some text?

How can I get the co-ordinates of the convex hull of a piece of Text?
8
votes
1answer
331 views

Way to find color at a point in a Graphics?

I need to figure out a way to find out the RGB color value at a certain coordinate in a Graphics object. The Graphics object I am dealing with is continually Dynamically updated, so it is made of ...
7
votes
1answer
336 views

Color linear interpolation of ParametricPlot3D

I am looking for any ideas about how to colorize an ellipsoid with a custom gradient style or by a Blend function. I would like to colorize ellipsoid as follows: ...
7
votes
1answer
184 views

How do I re-direct FilePrint's output?

I recently wanted to use FilePrint to print the contents somewhere else but in the notebook I was using. However, the obvious-seeming solution doesn't work at all: ...
3
votes
0answers
86 views

How do I direct output to a specific notebook or cell? [duplicate]

Possible Duplicate: How to pipe a stream to another notebook? Is there any way to create a stream so that all output to the stream (from Write or ...
20
votes
1answer
2k views

Autorotating 3D plots

These days, I have to produce quite a few 3D surface plots (mostly functions of the type $\rho(\theta,\phi)$ plotted with SphericalPlot3D). To exchange these ...
7
votes
2answers
421 views

Function Interpolation with Automatic / Algorithmic Values Mesh

I have an underlying function f(x,y,z) that is computationally intensive, but is smooth and continuous. I'm needing to find the function values along a line in xyz. Currently, I'm calculating f at ...
5
votes
1answer
117 views

Changes in Handling of Real Zeros

I recently upgraded from Mathematica 5 to Mathematica 8 and I have a number of notebooks that no longer work correctly. The problems relate to the use of units. I don't need complicated unit ...
16
votes
4answers
5k views

How to change the axes' origin and direction?

I have manipulated an image and want to ListPlot it. However, the result is not to my liking because the conventions for drawing images and plots are different. ...
8
votes
1answer
166 views

How to embed “Share content” button into a CDF?

I want to have a button present in a CDF that, when pressed, shares some content material e.g. via Facebook. Is it possible or would the restrictions of the CDF format prevent anything from happening? ...
14
votes
6answers
921 views

Annoying display truncation of numerical results

I have a lot of data to inspect. An example of a number in my program is 123.189094 This gets displayed as 123.189 ...
11
votes
3answers
451 views

How to mark an image?

How can I place a mark, like a cross-hair (to suggest "X marks the spot") and a text label associated with it, at a particular position on an image (mine in particular is ...
29
votes
5answers
2k views

Filling a polygon with a pattern of insets

I am trying to fill a shape with diagonal lines. I am aware of Texture, but it rasterizes the fill pattern, which is not desirable. Here was my crack at it: ...
10
votes
1answer
466 views

How to generate a real-time stream of data?

I'm experimenting with Inversion-of-Control (callback) programming patterns, and I would like a way to generate streams of data at specified real-time intervals. I came up with the illustrated way to ...
3
votes
2answers
234 views

Randomly redrawing part of a random sample that matches a criterion

I would need some (a lot of) help to improve/rewrite some code. Since my real problem is a bit too complicated to explain, I try to show with a simplified scheme what I want to achieve. I create ...
12
votes
3answers
900 views

ListLogLinearPlot logarithmic axis tickmarks

When using ListLogLinearPlot the abscissa labels every other decade. Is there a way to tell Mathematica to label each decade? I need to use this inside ...
5
votes
1answer
199 views

How can I run MUnit TestSuites outside WorkBench?

I would like to run MUnit tests inside TestSuite constructs from the command line or a notebook interface without loading the Workbench GUI. I tried ...
13
votes
1answer
2k views

What are the differences between the “Home Edition” and the regular Mathematica?

The product page for Mathematica Home Edition says: Mathematica Home Edition is intended for hobbyists and enthusiasts alike, for non-professional use. If you wish to integrate Mathematica in your ...
3
votes
1answer
160 views

CDF plug-in and animation controls

I've read through all the Q and A on the CDF plug-in and still am puzzled. I've managed to create some webpages with CDF content, it's working fine except when you reveal the animation menu and use ...
22
votes
7answers
2k views

How to avoid returning a Null if there is no “else” condition in an If contruct

I need to use If but with only one option that is if "a" then do "b", else do nothing. So I wrote If[a,b] but the problem is ...
8
votes
2answers
260 views

Does Mathematica on Mac OS use virtualization for certain functions?

I'm evaluating this code in Mathematica 8.0.0 on Mac OS X 10.6.8: ...
5
votes
0answers
605 views

Controlling the time step in NDSolve?

I generally use NDSolve for stiff non linear partial differential equations of 4th order. I find that a BDF1 method generally does well to placate my beast of a PDE. I've also tried out ...
11
votes
1answer
281 views

Facegrids at ticks

I want to plot a 3D graphic and I want facegrids at the ticks that I specify. I've tried several solutions but I cannot get this working. The result with the code provided below is that it does its ...
16
votes
3answers
429 views

Memory Leak in Frontend - anyone know a workaround?

When using Rasterize on a Graphics expression composed of many differently coloured Graphics objects memory is allocated in the frontend which is then not released or reused when a similar graphic ...
12
votes
4answers
2k views

How do I draw a DensityPlot in polar coordinates?

I am trying to plot $J_m(\chi_{mn} r) \cos(m\phi),$ where $J_m(\chi_{mn}) =0,$ as a DensityPlot in polar coordinates (solution to 2D wave equation in polar ...
29
votes
3answers
1k views

Are built-in Mathematica functions already parallelized?

I've been noticing something strange since updating to Mathematica 8, and that is that occaisionally I'll see that the MathKernel is using up to 800% CPU in my Activity Monitor on OS X (I have 8 ...
6
votes
1answer
2k views

How to extract sample values from an imported WAV file?

Suppose I read a file with B = Import["something.wav"] Now how can I obtain a list of sample values?
18
votes
4answers
1k views

Can 2D and 3D plots be combined so that the 2D plot is the bottom surface of the 3D plot boundary?

I have a ListlinePlot function, that I would like to combine with both a Graphics3D plot and a ...
9
votes
1answer
599 views

When using GraphPlot with an adjacency matrix, how can I make Mathematica draw exactly one self loop for any non-zero weight?

I have tried using the option MultiedgeStyle->None, but apparently Mathematica doesn't treat self loops in the same way it treats edges. For example, I find ...
2
votes
1answer
155 views

Issues with a Counter that is tallying term appearances

I am working with an array of textfiles, trying to see how frequent certain terms are. However, I am running into some difficulty with my running counts of bigram frequency. Here is a snippet of my ...
8
votes
1answer
303 views

Abort not aborting

I have a relatively simple bit of code that looks like the following: ---some code here--- If[statement, Abort[]]; ---more code following--- However, while ...
2
votes
3answers
801 views

Orthonormalization of non-hermitian matrix eigenvectors

When using Orthogonalize[] one can specify which definition of "inner product" is to be used. For example, ...
41
votes
4answers
4k views

How to make a 3D globe?

There are many ways to create a 3D Earth that is rotatable (see here, here, related here), but most of them have some drawbacks. These issues mainly stem from either ...
25
votes
2answers
732 views

Transpose uneven lists

Is there a quick method to transpose uneven lists without conditionals? With: Drop[Table[q, {10}], #] & /@ Range[10] Thus the first list would have the ...
14
votes
1answer
549 views

Using Texture to color countries according to their timezones

So I'm trying to make a world map, where each country is colored according to its timezone. Except, for countries with multiple timezones, the country is filled with vertical stripes of colors ...
1
vote
1answer
182 views

NIntegrate is resetting my variables and not giving me a result?

I am trying to check if mass conservation holds by integrating the area under a curve but to no avail. ...
6
votes
1answer
292 views

What does MaxStepFraction do?

I find that with NDSolve[...] while solving a partial differential equation, changing the MaxStepFraction from ...
5
votes
1answer
395 views

Export to file from ParallelDo loop

I currently have a Mathematica code similar to: ...
7
votes
1answer
304 views

Setting the DifferenceOrder Option

I've been playing around with Method in NDSolve[...] and can't quite seem to figure out how to force ...
11
votes
2answers
249 views

Convert operator to string

How to programmatically convert an operator such as Equilibrium into its displayed form as a string? The conversion should work like this: ...
11
votes
4answers
575 views

How do I get rid of the overlap of gridlines and tick mark labels?

I wish to include the plot generated by the following Mathematica code ...
10
votes
1answer
464 views

Modifying a List in a function in place [duplicate]

An example will be most specific: func[list_, column_] := list[[All, column]] = Map[#*2 &, list[[All, column]]]; This throws errors. I want to avoid doing ...
0
votes
1answer
362 views

How to reduce the memory necessary for the image? [duplicate]

Possible Duplicate: Exporting graphics to PDF - huge file I have a figure that is created to use in a paper. Here it is: ...
3
votes
1answer
108 views

How to edit the text coming together with the numeration of pages in pdf produced out of a notebook?

I am writing a text that I am going to publish on-line. When I transform it from the notebook into the pdf format I get the numeration style typical for Mathematica: I would like to edit the text ...
10
votes
3answers
2k views

Strategies for simplifying complicated expressions

I have a very complicated expression involving trigonometric functions, complex numbers etc. You may find it here as it is too long to be pasted here. You may also find a screenshot of it here. ...

15 30 50 per page