24
votes
0answers
324 views

Are greek symbols causing different evaluation?

I've updated today to Mathematica 9.0.1.0 from version 8 and found something that absolutely confuses me. Let us define a piecewise function: ...
22
votes
5answers
582 views

Compiling ColorFunction for faster complex phase-amplitude plots

I have gotten into the habit of plotting complex-valued functions on a plane using a color-function along the lines of ...
22
votes
2answers
820 views

Are there any “RLink” like projects, which enable the interaction between R and Mathematica?

I want to borrow the vast amount of packages of R. I know there was one but it is neither sold nor supported anymore. So are there any active open source projects for linking R with Mathematica? Thank ...
21
votes
2answers
2k views

Unsaved notebook is crashing: is there any way I can save the state of the MathKernel before I kill it?

So I'm in the middle of generating some plots and all of the sudden the frontend goes dead and I haven't saved my work. I'm using Mathematica 8 in MacOS X. The MathKernel process is still running and ...
20
votes
2answers
714 views

When to make (file.nb) instead of (file.cdf)?

I started with File > New > FreeCDF so I can save my work in a format compatible with the CDF Player. I can use Mathematica to make new cells, evaluate input and so in the CDF file. What are the ...
20
votes
1answer
975 views

Graph vs GraphPlot

What is the difference (in purpose) between Graph and GraphPlot? Which function is bested suited to which tasks? Background: I ...
20
votes
8answers
3k views

Shading between polar graphs

Since PolarPlot doesn't support Filling, what is the best way to shade or fill the a region between two polar curves? For ...
19
votes
1answer
599 views

Using Transpose with a list as the second argument

I'm having difficulty understanding the Transpose function. I know what the transpose of a matrix is, not a problem, and I see that applying the ...
19
votes
3answers
1k views

Download xkcd Click and Drag comic

Inspired by the recent question about xkcd styled plots I started looking at xkcd again and I came across a comic titled Click and Drag. And if you do that, you start exploring a larger drawing. A ...
19
votes
5answers
715 views

How to visualize the voting choices in the moderator elections?

I'm trying to use Mathematica to create some visual representations of the votes cast in the recent Mathematica-StackExchange moderator elections. (Not the vote-counting system itself, OpenSTV, but ...
19
votes
2answers
971 views

Using the Krylov method for Solve: Speeding up a SparseArray calculation

I'm trying to implement this Total Variation Regularized Numerical Differentiation (TVDiff) code in MMA (which I found through this SO answer): essentially I want to differentiate noisy data. The full ...
19
votes
3answers
657 views

Change the color of a Locator in a Manipulate

How can I change the color of a Locator in a Manipulate? As an example, consider the following. ...
18
votes
1answer
210 views

“With” as part of the “Dynamic Interactivity Language”

I noticed that in Mathematica's Function Navigator With is listed as being part of the "Dynamic Interactivity Language". It is not the first (or even the fourth, ...
17
votes
1answer
146 views

Help understanding overloading of Atomics within Block

Usually h @@@ {f[1, 2], f[3, 4]} === {h[1, 2], h[3, 4]} but this is not the case when f is ...
16
votes
0answers
260 views

What is the status of `::Usage` and Templates in Mathematica v10?

In Mathematica 9, a number of issues concerning the ::Usage and templates were raised. In 9.0, there was a bug first reported here and better diagnosed here, where ...
16
votes
2answers
427 views

Scaling edge thicknesses

UPDATE There may be some confusion as to the specification of the problem. kguler's answer doesn't really answer the question. I'll try to elaborate a bit at the bottom of the post. One problem ...
16
votes
1answer
532 views

Wagner's trick to monitor FindRoot no longer works in Mathematica version 8

I recently learned that we can use Print as a monitoring tool. My favorite is Ted Ersek's example ...
16
votes
1answer
349 views

Are there advantages to using additional arguments of common functions rather than alternative ways of calculating with lists?

(Apologies for the long question title.) One of the interesting, if sometimes confusing, things about Mathematica is that there is always more than one way to do things. Even intermediate users can ...
15
votes
2answers
229 views

Where is the old option TraceInternal->True?

Already at least in version 2 (I think), the function Solve calls the function Roots. At that time, I had a rather dirty trick, that still works, to verify this: ...
15
votes
2answers
252 views

How do I get a list of allowed values for an option?

When using Mathematica how can I get a list of the allowed values of an option? As an example I can use the Options command as follows - ...
15
votes
1answer
648 views

Why are all the lines commented when I create a Mathematica script?

When I created a Mathematica script, I found that all my lines were commented out (when opened with vi or gedit or any other ...
15
votes
2answers
665 views

Command Completion

Note: As of version 9, this functionality is available and works out of the box. I've a few questions about Command Completion in Mathematica. I recently discovered this feature, and it's really ...
15
votes
3answers
265 views

What is the most convenient way to change options for Graph[] objects?

What is the most convenient way to change options such as VertexLabels in existing Graph objects? (Version 7 users note: ...
15
votes
3answers
635 views

Measure a DensityHistogram[] pair similarity

I study human vision and more specifically eye-movements. "If we display 2 symmetrical patterns (20 min one after the other), will our gaze distribution be symmetric is my research question." The 2 ...
15
votes
1answer
612 views

Can the position of Tooltips be changed?

Is it possible to change the position of tool tips, which currently always appear to the lower right of the mouse position. In the screen grab below the mouse is over 10000000 and the tooltip appears ...
15
votes
4answers
768 views

How can I create a ColorFunction using Blend?

As shown below, I am trying to find a cool way to show some variance weighted deviation from the mean. There are 10 attributes that I compute the distance for. How can I add a color function such ...
15
votes
2answers
204 views

Clearing a specific definition

Consider the case where a symbol has multiple definitions attached to it, a /: Subscript[a,2] := 1 a[b_] := 2 a[b_, c_] := 3 How does one clear (/unset/remove) ...
14
votes
3answers
172 views

Partitioning with constraints on subsets

Given the following data: constraints = {{11, 2}, {11, 3}, {11, 4}, {11, 6}, {11, 9}, {1, 6}, {5, 6}, {2, 5}}; weights = {3, 7, 3, 2, 4, 2, 2, 2, 3, 2, 1}; I ...
14
votes
3answers
191 views

How do I understand ListCorrelate(contains $\{k_L,k_R\}$) when it works for 2-dimentional data?

Two months ago, I asked a question here And @nikie give me a solution: The intuitive way to understand ListCorrelate is that the kernel is "moved" to every ...
14
votes
6answers
2k views

Why can't I define vector v as having subscripted elements v_1, v_2, v_3…?

I'm a very beginner in Mathematica 8 programming. While trying to play a little with tensor analysis I encountered a problem. How to define for example vector in such manner: v={$v_1,v_2,v_3$} For ...
13
votes
1answer
386 views

Why does Mathematica give an incorrect answer to this multiple integral?

This is not a new problem but I would like to understand why Mathematica gives the result that it does. (Volume of a hypersphere) ...
13
votes
1answer
568 views

Simulating discrete time stochastic dynamic systems

What is the canonical way of simulating discrete time stochastic dynamical systems in Mathematica using the new functionality of Random processes? To take a concrete example, lets consider the ...
13
votes
2answers
554 views

Single-Window-UI not possible?

I'm still very frustrated about the separation of the menubar (File, Edit, Insert, ...) and the open notebooks in different windows. I would prefer to have the menubar directly above each notebook in ...
13
votes
1answer
1k views

How to export transparent raster plots?

Is there an easy way to get transparent plots that work with Save Graphic As using a compatible file format such as GIF or PNG? I tried ...
13
votes
3answers
2k views

Mathematica script - passing command line arguments

When using Mathematica script #!/usr/local/bin/MathematicaScript -script Print[$ScriptCommandLine] and running it with some arguments: ...
13
votes
3answers
1k 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 ...
13
votes
2answers
580 views

Saving a notebook without output lines

Is it possible to change the way Mathematica saves so that Out[] lines are never included? I have a .nb file that processes a ...
13
votes
2answers
994 views

Symmetrical image transformation for a kaleidoscope-type image

I've been trying to write a little kaleidoscope-type manipulate, using images rather than graphics, and using ImageTransformation as a way in. However, I'm starting ...
12
votes
0answers
111 views

Reading from a socket stream

I noticed an undocumented socket package (SocketLink) in Mathematica (Using version 10, not sure when it was actually added) and wrote a barebones HTTP responder ...
12
votes
2answers
537 views

How to get grid lines at all (log) tick marks in Version 10?

In Version 7 using GridLines -> Automatic (or All) would put a grid line at every log-spaced tick mark: ...
12
votes
3answers
909 views

How can I type-check the arguments of a Mathematica function?

(For educational purposes) I defined the following functions: Translation (in $\mathbb{R}^2$): trM[vec_] := {{1, 0, vec[[1]]}, {0, 1, vec[[2]]}, {0, 0, 1}} ...
12
votes
3answers
218 views

Selective evaluation of blocks of code in a Manipulate

Is it possible to attach certain pieces of code to certain controls in a Manipulate? For example, consider the following Manipulate ...
12
votes
3answers
1k views

How can I transfer mathematical expressions between Mathematica and Maple?

Is there a simple way to copy mathematical expressions between Mathematica and Maple (or at least in one direction)? I mean only expressions built from numbers and predefined mathematical functions, ...
12
votes
1answer
272 views

Use TextRecognize to grab timestamps from a video frame

I have microscope videos that have a timestamp overlay to them, and it would be great if I could extract this for each frame to add to my metadata. TextRecognize ...
12
votes
3answers
2k views

How to place legend labels for Histogram and ListLinePlots correctly?

I would like to place AxesLabels: For x axis at center of the Histogram and LineListPLots. For y axis rotated 90 degree anti clockwise. I don't see any options for it? ...
12
votes
0answers
593 views

Dual complex integral over implicit path using contour plot

Context I am interested in doing double contour integral over paths which are defined implicitely. For the sake of debugging, let's assume its $$\oint_{\cal C}\oint_{\cal C} \frac{1}{u\, x} d u d x$$ ...
12
votes
4answers
515 views

Calculate proportion of values for dates

At work, we were discussing when is it the best time to change to winter tires for bikes and/or cars. Using WeatherData[] and ...
12
votes
3answers
2k views

Manipulating the axis on a ListLinePlot

I am trying to create a plot using ListLinePlot in which the x-axis is represented in a logarithmic scale, and is reversed (so larger values are on the right side). ...
12
votes
3answers
3k views

How to do System dynamics simulations / diagrams in Mathematica?

System dynamics is an approach to understanding the behaviour of complex systems over time. It deals with internal feedback loops and time delays that affect the behaviour of the entire system. What ...
12
votes
3answers
1k 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 ...

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