# All Questions

44 views

### How to use WikiMapia as GeoServer?

I wish to use the Wikimapia map as background in GeoGraphics. According to the Wikimapia Docs, Wikimapia's URL is encoded as follows: An example Wikimapia URL ...
172 views

### Drag and Drop Support

Is there a way to effectively get drag and drop so you can drag files onto nbs in Windows? For example similar to the way .bat scripts work. Ideally I would like the script to automatically execute ...
298 views

### How to find a specific error message?

Is there a way to find an existing error message in the System context, that is used for a certain case? I want to include a message in a custom function that ...
31 views

### Adding up a list of subscripted elements

I have a list of entries with subscripts. I want to add just the entries. How can I do that in the presence of subscripts? For example: list = {1a, 2b, 3c} And ...
1k views

### 3D Random Walk with Periodic Boundary Conditions

I am working on a 3D random walk with periodic boundary conditions and have written a program that will do this for me, but it is extremely slow. Does anyone have any suggestions on how I could speed ...
38 views

### Running an animation if a certain condition is met using Manipulate

I'm having trouble finding a way to play an animation (inside Manipulate) if a certain condition is met. I'm representing liquid volume with rectangles and if the ...
59 views

### Auto Execute Notebook on Open [duplicate]

How might I automatically execute a notebook script on open? For example I would like to a notebook to automatically execute it's cells.
138 views

### Turning an expression into a function inside another function

Say I have an expression g=Sin[q]; It is easy to turn it into a function, and to perform manipulations on this function (this and variants of this were discussed ...
609 views

### Annoying FrontEnd bugs in Mathematica 10

Bug introduced in 10.0.0 and fixed in 10.0.2 Recently I installed Mathematica 10 on Windows 8 x64 machine. Before that I had a prerelease version of Mathematica 10 installed on my laptop. I ...
24 views

### Find all synonyms of word X that rhyme with word Y

Given two words x and y, I'd like to find the set of all words that rhyme with x and are synonymous with y. Is this possible with WordData or ...
17 views

### Spurious infinite limit of integration message in NIntegrate

NIntegrate returns an error complaining that ComplexInfinity is an invalid limit of integration when passed exact input but not ...
35 views

### Integrate complains about incompatible quantities in integration limits

When I run the following code, Integrate throws ...
98 views

### BarLegend using Function that uses Blend

Bug introduced in 10.0 and fixed in 10.1 I'm sorry if this is a duplicate, but I don't even know how to look for it. I had this line of code that worked on a Notebook I wrote on Mathematica 9.0: ...
104 views

### Even with Evaluate[], Mathematica is plotting everything in the same color

The code evals[x_?NumericQ] := Eigenvalues[{{x^2, 2 x}, {x, 3 x^2}}]; Plot[Evaluate[evals[x]], {x, -1, 1}] gives both eigenvalues in the same color. I thought ...
540 views

### Excessive memory use by Mathematica kernel in 10.0.2 after executing simple commands

Bug introduced in 10.0 and fixed in 10.1 Warning: the code below may hang your system if you have the Suggestions Bar enabled in Mathematica < 10.1. When issuing the following simple ...
19 views

### JSON Expandable/Collapsible Fields with OpenerView

When you have a deeply nested hierarchical JSON structure, tools like JSON Editor Online help a lot to get an overview of the structured data at various levels. In this way you control the ...
59 views

### Problems with StateSpaceModel in v10.2

Bug introduced in 10.0.2 and persisting through 10.2 or later I don't know if this is a bug, or if just something changed I can't figure out. Take the following examples: ...
62 views

### Is there a way for accuracy backtick notation to accept variable inputs?

Backtick notation uses 1.0`20 to give 1 with 20 places of accuracy after the decimal point. But what I want is ...
86 views

### How can I produce an animation in a WPC notebook? [on hold]

I want to display an animated Sin curve in a Wolfram Programming Cloud notebook. I tried the docs' example for Animate ...
39 views

### Adding a fading color only to 3D curves going outside a cylinder

I'm having a problem with color shades on multi curves drawn with the Mathematica 7.0 code below. All the curves with both their endpoints inside the unit cylinder (green circle on the picture below) ...
21 views

### Why is assoc[“a”] =. different from assoc[[“a”]] =.?

Accessing parts of an Association can be done either using Part or the [] extracting ...
73 views

### Is it possible to find the size of a variable in a notebook?

I have a fairly large a list of matrices matsLst, which takes about 15 minutes to compute (but computes successfully each time). I can test in the notebook that ...
13 views

### Choosing appropriate WorkingPrecision when solving numerical system of equations

Consider a linear system of equations, which is conveniently written as A.x=b. The matrix A has dimensions ...
22 views

### Exporting a Large Graphic Output Uncrops the Image

I want to export an image exactly as it is shown in the notebook, but when I specify a high image resolution, the image saved to disk does not match what is shown in the notebook (the image saved ...
48 views

### How to compare and remove x-coordinates (and the associated y-coordinates) that are less than previous x-coordinates?

I am using Mathematica version 9.0 and am trying to compare and remove x-coordinates, and the associated y-coordinate, that are less than previous x-coordinates. Below is an example using sample data. ...
119 views

### How to make a Nebulabrot?

A Nebulabrot is a generalization of the Buddhabrot, a fractal rendering technique related to the Mandelbrot set that sort of looks like a meditating buddha. The Buddhabrot rendering technique was ...
65 views

### How can I avoid these defects in ContourPlot3D output on WPC?

What I do: ContourPlot3D[-x^2/17.07 + y^2 + z^2 == 1 - x^17.07, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}, Mesh -> None, PlotPoints -> 16] What I get: ...
49 views

### Reading from a file: complex number with small imaginary part

I'm trying to read a matrix from the next file: 1+1e-18i 24 42 23.43e-23i using u=Import["file.dat","Table"]; and then find, ...
2k views

Can users of Mathematica on Windows 7 or Windows 8/8.1 upgrade their computers to Windows 10 – a process that began today? Does Mathematica work? Are all the settings, licenses, access to files and ...
343 views

### Convert array from {{…}} to “[[…]]”

I have made this function: conv01 = Map["["<>StringJoin@@Riffle[#,","]<>"]"&,Map[ToString,#,{2}],{0,1}]& to convert: ...
9k views

### How can I improve Mathematica's resolution on a macbook retina display?

Mathematica 9.0 looks a bit fuzzy on the retina screen, how can I increase the resolution? Here another screenshot showing a direct comparison between the browser and Mathematica
69 views

### Interpreting Results of Repeated Measures - Shift calculation in plots

What would be a more accurate method to calculate the shift in waveform (waveform drift) from a collection of 20 or more data plots. Current method, Plot all using Show and see if there is some ...
301 views

### BUG: AssociationMap loses definition

Bug introduced in 10.0.0 and fixed in 10.1.0. I'm facing a strange behavior of AssociationMap. With a fresh Kernel session: ...
192 views

### Linux: Mathematica crashes when clicking documentation links very fast

Bug introduced in 10.0.1 or earlier and fixed in 10.1.0 Can someone confirm the following behavior: Open a new Mathematica and go to the documentation. Navigate to any reference page (I used ...
119 views

### Bug in GeneratingFunction?

Bug introduced in 7.0 and fixed in 9.0.0 According to the documentation GeneratingFunction[a[n],n,x]==Sum[a[n]x^n,{n,0,Infinity}] However, for $a_n=1/(n+2)$ I ...
415 views

### Why does LogLinearPlot sample its argument outside the specified domain?

Bug introduced in 6.0 and fixed in 9.0.0 I experience a weird bug in the function LogLinearPlot. If the input is an interpolation function, such as the one ...
102 views

55 views

### Replace parts of nested lists

I have list of stock data as follows: lis1= {{{1992/10/12, 126.946, AEX}, {1992/10/13, 127.85, AEX}}, {{1992/10/12, 88.487, AFLI},{1992/10/13, 91.825, AFLI}}} ...
782 views

### How can one define an infix operator with an arbitrary unicode character?

You can setup "UsefulFunction[a, b]" to use custom infix notation "a [LeftRightArrow] b" as follows: ...
82 views

### Converting an expression to function

I have the following problem. I current can automatically create the variable positionPayload, for instance: ...
238 views

### HoldForm[Operator ##] on some list

Recently in response to this question Mr.Wizard suggested an unusual way to summing numbers. This doesn't seem to be documented. ...
41 views

### How to simultaneously extract contourvalues and contourline?

Given a contour plot, plt=ContourPlot[Sin[x y],{x,-1,1},{y,-1,1}] I can extract the values of the contour lines using, ...