3
votes
2answers
904 views

Use ColorFunction in ListLinePlot with If

The following code ListLinePlot[{2, 4, 6, 8, 10, 12}, ColorFunction -> Function[{x, y}, If[x <= 3, Blue, Red]]] should produce blue lines for $x\le3$ and ...
4
votes
1answer
126 views

Is there a way to programmatically do a “save as ” on an init.nb file to save it as init.m?

I am using Mathematica 8.0.4.0 running under Windows 7. Is there a way to programmatically do a "save as " on an init.nb file to save it as init.m? In the documentation center under ...
6
votes
4answers
378 views

Why does my function defined with constraints on patterns not work? [duplicate]

Possible Duplicate: Why doesn't PatternTest work with Composition? My function is something like this, ...
11
votes
2answers
829 views

What is the precedence of FrameStyle, FrameTicksStyle, and LabelStyle? How to have a LabelStyle different from FrameStyle

From the documentation: Plot[2 Sin[x], {x, 0, 10}, Frame -> True, FrameLabel -> {x, y}, PlotLabel -> 2 Sin[x], LabelStyle -> Orange] But then add ...
3
votes
2answers
611 views

Unexpected result of summation

I wrote a small module that gives me an incorrect output-set. It should be a single number! I don't understand what went wrong. This is the form of summation used: $$\frac{1}{2} (b-a) \sum_{i=1}^n ...
4
votes
1answer
2k views

exporting list of matrices in mathematica

I am working on some problem which requires generating a list of random matrices. So I used the code (actually a shortened version of the code, but it does not matter) ...
29
votes
2answers
1k views

How can I set an image to be the Notebook's background?

Is it possible to set a notebook's background to a nonscrolling image?
7
votes
5answers
361 views

Is it possible to insert arguments into functions when they're used like Function@ or //Function?

Is it possible to insert arguments into functions when they're used like Function@ or //Function? Sometimes I need to do this, but then I have to return to the standard function usage: Function[] ...
13
votes
5answers
728 views

Calling Table with custom iterator

I often find myself in situations where I, for example, need to build a table for some expression, but want to set the number of points rather then the step size, so the code ends up looking like this ...
7
votes
4answers
228 views

Are persistent variable values after the kernel is stopped possible?

Is there a way to make values of variables persistent even after the kernel is stopped? Example, if I were to set up a list for which I append new list items (such as a check ledger, as a basic ...
5
votes
1answer
137 views

New display format needed: “drag box”

I want to create a new display type, especially for numbers or text, but potentially for arbitrary objects as well. I want a "drag box" where not all of the number (object) is visible, but dragging ...
6
votes
1answer
412 views

Support for Multidimensional Scaling (MDS)?

Does mathematica support MDS? Or, are there any libraries that support it? Basically, I have points and a distance function defined between them, and I want to plot them in 2D space, trying to ...
3
votes
1answer
318 views

Manipulating a catenary in Mathematica

I have a catenary curve in Mathematica, and I wanted to add a variator (dimmer) with Manipulate, so that the user can modify the value of the x/y-coordinate of the ...
14
votes
4answers
754 views

Implementing a function which generalizes the merging step in merge sort

One of the key steps in merge sort is the merging step. Given two sorted lists sorted1={2,6,10,13,16,17,19}; sorted2={1,3,4,5,7,8,9,11,12,14,15,18,20}; of ...
12
votes
3answers
2k views

How to set tick label precision [duplicate]

When I make a plot like Plot[Exp[x], {x, 1 - 10^-9, 1}] The resulting plot looks like . Notice all the ticks on the x-axis are all labeled 1. Is there any ...
17
votes
2answers
2k views

Edit a Mathematica plot in Illustrator, missing font problem

I export my Mathematica generated plot as an eps and then open it in Adobe Illustrator to make a few changes. When I try to do this I get this error message: Times-Roman: Font not found on ...
4
votes
2answers
323 views

Color based on (discrete) derivative of function

I am making a very basic stock simulation. I want ListLinePlot to color my stock viewer based on whether the price went up or down from the previous price. Here is ...
4
votes
1answer
131 views

What is the syntax for selecting multiple layers in an Overlay?

From the documentation: Overlay[{Subscript[expr, 1],Subscript[expr, 2],...},{i,j,...},s] allows selections to be made and controls to be clicked in Subscript[expr, s]. and an example of ...
8
votes
5answers
834 views

can the color in MeshStyle be specified by a ColorFunction, such as “SunsetColors” for example. If so, what is the correct syntax?

This is an example given in Help: Plot3D[Sin[x y], {x, 0, 3}, {y, 0, 3}, MeshStyle -> Gray] Could this be changed to something like ...
2
votes
1answer
1k views

Export Animate command to MOV video

I'm trying to export a rather complex Animate command into a full-HD resolution video, but having no success so far. The animation has around 520 frames (the number ...
8
votes
4answers
235 views

Data Entry via 2D Graphic (formerly: Using a Slider2D to add data points to a list)

This bit of code sets up a list with the first entry already in it -- {{1,1}}: ...
17
votes
3answers
2k views

How to calculate volume of convex hull and volume of a 3D object

I have a set of random 3D data points. How can I calculate the volume of the convex hull?
2
votes
1answer
206 views

Need more float precision

I have a Physics problem which huge and tiny numbers and Mathematica just gives me a speed of my particles which is the speed of light. Then $1/\sqrt{1-v^2/c^2}$ becomes singular. If I use smaller ...
2
votes
2answers
127 views

How to evaluate this product

I was trying to evaluate this product $$ \sin (1^\circ) \sin (2^\circ) \sin (3^\circ) ... \sin (88^\circ) \sin (89^\circ) \sin (90^\circ) $$ But I think it got weird results with this ...
12
votes
3answers
907 views

What compilers are “suitable” for CompilationTarget->“C”?

The documentation for CompilationTarget says, "if you do not have a suitable C compiler then you will not be able to set CompilationTarget to C". Well at this time, I don't have a compiler installed ...
9
votes
2answers
387 views

Why do I have to put Evaluate[] here

I wanted to draw some contours. I succeeded with this: ...
10
votes
3answers
611 views

Different calculation of median and quartiles, bug in BoxWhiskerChart?

When you plot a dataset with BoxWhiskerChart passing over the box in the plot with your mouse pointer shows some specifics about the dataset (min and max values, ...
6
votes
1answer
191 views

How to reduce expressions with complex coefficients in the form of a+0.*I

I'm trying to get an eigenvalue equation in Mathematica, and the result is an expression with coefficients of the form a + 0. I. For example, Is there any clever ...
5
votes
3answers
318 views

HoldFirst and inserting additional options into a Grid of Graphics

This is related to my earlier question, but is specific to an issue I have encountered with the use of the HoldFirst First, let's create some fake data for ...
2
votes
0answers
296 views

Having difficulty with the Minimize command

I am having trouble getting an answer to this question...Am I missing something that anybody can see. ...
28
votes
2answers
2k views

Do I have to code each case of this Grid full of plots separately?

I have written some custom functions to draw multi-panel graphs like this one: It's done by passing a matrix of (custom) plotting functions to a MultiPanelGraph ...
21
votes
3answers
1k views

Calling external commands without showing command prompt on windows

I'm playing around with some code that's calling external command-line commands on a windows platform, and when doing this, the command prompt will pop up quickly and then disappear. This is not a ...
4
votes
1answer
363 views

Error Interpretation in NIntegrate

I am using a recursion algorithm developed by Migdal for Lattice Field Theory, and I have the following code: ...
11
votes
2answers
1k views

Converting ConditionalExpression to Piecewise

I have Solve[] return a list like ...
13
votes
2answers
3k views

Plotting complex Sine

I've got another plotting problem. I want to plot Sin[z] where z is complex. So, I've tried the following: ...
10
votes
2answers
875 views

Is there any way to obtain an approximate inverse for very large sparse matrices?

I have a very large sparse matrix and I need to obtain its approximate inverse and save it as an sparse matrix too. Any of my efforts as could be seen in what follows fail for large n ...
7
votes
2answers
2k views

Formatting Ticks and FrameTicks labels with a function

Is there a convenient way to format tick labels? In this example I would like to use the default Mathematica tick intervals, but simply convert the X axis labels to strings with "s" added. As you ...
3
votes
3answers
622 views

How can I change the CDF which imports the data and uses it, without execution of code

I am making an application which first imports the data from the Excel file and then uses it in the deployment of a CDF. But is it possible to change the data of the Excel file and see its ...
14
votes
2answers
1k views

How to deal with complicated gaussian integrals in Mathematica?

As we know, for most Gaussian integrals, we can get the analytical result. Now I have many Gaussian integrals to treat, which have the following general form, ...
2
votes
2answers
629 views

How to solve a Differential Equation with DSolve with Function Coefficient?

Suppose I have v[x_] = (1.453 Sech[x + 1])^2 + I Sech[x + 1] Tanh[x + 1] And I have to solve the equation: ...
4
votes
2answers
201 views

How to display cell groups in documentation pages

I recently introduced my WildCats package in the Meta Thread What third-party packages do you use? and @Szabolcs promptly observed that: "I noticed that there are many cell groups in the documentation ...
8
votes
1answer
1k views

Exporting a Large Multidimensional Sparse Array

I'm trying to export a sparse array from Mathematica to share with collaborators who primarily use Matlab. The sparse array in question is 4 dimensional, (72 x 93 x 94 x 172) with ~4M non-zero ...
5
votes
5answers
616 views

How can I use nested conditionals inside my functions?

I'm a big fan of using conditionals inside my functions to deal with cases, that is, to pattern match in stages and possibly leave a function unevaluated. ...
11
votes
2answers
433 views

How can I overload autocompletion to work with full contexts?

I would like for the autocomplete feature to search through contexts, for example if I have a symbol named A`B`C`MyFunction, when I type A` and press "cmd + shift + k" it will complete it. Edit To ...
11
votes
5answers
2k views

How do you plot the same function with different options over different intervals?

Here is the motivation for my question. I want to plot Sin[x] over the interval 0 to 2 π, ...
24
votes
2answers
1k views

How can I pack circles of different sizes into a spiral?

Given a list of circles of different areas, I need to arrange them tangentially in order of increasing area and spiraling outward. An example of the type of packing I'm attempting is shown by the ...
37
votes
3answers
1k views

Tiling a square

I wondered if there was a way to automate the process of finding a way to tile a tile into a square. The idea is to represent the tile with a matrix of $0$s for blank space and $1$s for filled spaces ...
3
votes
2answers
1k views

How to substitute numeric values in a symbolic Jacobian matrix?

I have a multi-variate function from $\mathbb{R}^n\to\mathbb{R}^n$. Choosing any desired initial vector, we can produce the corresponding function value, which is a vector as follows. The main problem ...
9
votes
1answer
231 views

Error Using Sow in DensityHistogram with ColorFunction

To find the color values used in a plot, I was using Sow as shown here: ...
30
votes
1answer
562 views

What can I use as the second argument to Return in my own functions?

Having found out about the second argument to Return I played a bit with it, and the following tests all resulted in ...

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