12
votes
4answers
883 views

Evaluation of a triple sum does not finish in reasonable time

I'm trying to compute the following triple sum, but no result is produced within a reasonable amount of time. What to do? ...
12
votes
1answer
187 views

How to get an adaptive frame which fits auto-wrapped text? [duplicate]

When using the built-in Debugger, the breakpoints and the current step will be framed looks like this: My favorite part is, those frames are adaptive to the text when window width changing makes it ...
12
votes
4answers
457 views

Grid - Item - Alignment to decimal problem

Still present in version 10. I've run into a Grid layout problem for which I don't know a solution. I want to specify alignment to a specific character such as ...
12
votes
2answers
348 views

Using uniform coloring in MatrixPlot

I have a rectangular matrix, which is m-by-10. Each element is either 0 or 1. I would like 0 to correspond to white elements, and 1 to red elements. This works ...
12
votes
1answer
257 views

How to make an unremovable modal window?

Is there any way to securely stick a notebook window (e.g. a dialog) on screen that it cannot be closed/removed/hidden by any of the standard OS shortcuts, like AltF4 or AltTab under Windows? The ...
12
votes
4answers
3k 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 ...
12
votes
3answers
342 views

Arguments to If[] are not evaluated

I got bitten by the following: f[x_] := 3*x; g[x_] := If[Log[f[x]] < 0, f[x], 0]; g[x] Out[11]= If[Log[3 x] < 0, f[x], 0] where I thought the call to ...
12
votes
1answer
243 views

Effects of single-point and multi-point calls of Point on plot range

Several Graphics primitives are listable. For instance, Point accepts lists of coordinates so that multiple calls to Point are ...
11
votes
2answers
209 views

Is there a bug in AssociatePairs?

bug persist as of 10.0.2 In Version 10, the GeneralUtilities package contain some useful functions. AssociatePairs is one of ...
11
votes
1answer
195 views

AbsoluteOptions prints error messages in V10

Bug introduced in 10.0.0 and fixed in 10.0.2 I am trying to use AbsoluteOptions in V10 but I am getting the Out with some errors as see in this picture: does anyone have same issue?
11
votes
1answer
207 views

How to suppress Tooltip in built-in templates?

...or maybe switch the message. But I will be happy with no Tooltip at all. I've naively tried with ...
11
votes
4answers
661 views

How can I return a Sequence?

Recently I had the need to redefine a certain symbol in my init.m so it would be automatically omitted from any lists it appears in. I decided to redefine it to an empty sequence, e.g. ...
11
votes
2answers
255 views

can a ColorFunction have side effects?

Can anyone explain this (to me) odd behavior. If I run this code once (fresh kernel) it works as intended. ...
11
votes
1answer
366 views

How does Mathematica know my location?

On the AstronomicalData page in the online reference, it says for AstronomicalData["Sun", "NextRiseTime"] that it finds the ...
10
votes
3answers
345 views
10
votes
1answer
133 views

Why won't SparseArray let me store values with the head List?

When you attempt to define a SparseArray with elements that have the head List it complains: ...
10
votes
2answers
402 views

Syntax highlighter shows error for Manipulate when it's inside a Block or a Module

I'm putting my new copy of Mathematica 10 through its paces and I noticed a weird change in the colouring scheme that I find very annoying, and I'd like to get some insight into why it's happening. ...
10
votes
3answers
312 views

Correct way to integrate a certain function

I want to integrate $$ \int_{0}^{2\pi} dt_1 \frac{a + b*\cos(t_1 - t_2)}{c + d*\cos(t_1 - t_2)} $$ where $a, b, c, d, t_2$ are real numbers and $c + d > 0$ & $0 \leq t_2 \leq 2\pi$. I used ...
10
votes
0answers
282 views

Create a new infix operator [duplicate]

It is well known that the infix operator @@ is used as a short form of Apply. For example, both ...
10
votes
2answers
286 views

Filling Fill incomplete in ListLinePlot

...
10
votes
2answers
208 views

Return partial result when MemoryConstrained aborts NDSolve

I use NDSolve to solve a large set (~400) of coupled ODEs. Sometimes, the memory (~4GB) gets filled up, and my computer becomes impossible to work with, because it ...
10
votes
2answers
615 views

Derivative from the left and right

I am currently trying to write a script that takes a curve $C$, a starting point $p$ and a direction vector $\vec{v}$ and calculates the path of a beam starting at $p$ in direction $\vec{v}$ when it ...
10
votes
2answers
263 views

Make a button that evaluates a function over and over

I would like to have a command "RedoButton" which would make a button (or whatever control is suitable) that when clicked would print the value of a certain function over and over in the same place. ...
10
votes
4answers
424 views

Extracting equations from Piecewise expressions

Say I have a PDF: PDF[LogNormalDistribution[1.75, 0.65], x] Calculating it, Mathematica gives me an expression that looks like this: I want to extract the ...
10
votes
3answers
930 views

How do I change the Font in BarChart Legend?

Just wondering if anyone knows the proper Syntax to change the Text properties in the BarChart's ChartLegend. I cannot seem to figure out how to get Style[] to apply. Here is an example: ...
10
votes
2answers
570 views

Creating randomly oriented planes

I would like to create randomly oriented planes. This is how I'm attempting to do that: I create a 2 random unit vectors, $\mathbf{v}_1$, and $\mathbf{v}_2$, in the $x$-$y$ plane I assume that if I ...
9
votes
4answers
281 views

Why do quote marks appear in output when saved with Save Selection As?

Update #2: This behavior has been confirm across platforms and in multiple versions. Therefore: Is this a bug or a feature? Can I disable this "feature" so that copying a selection of Cell contents ...
9
votes
0answers
228 views

Strange filling

I observed some strange behaviour when plotting a function with filling. The code is as follows: ...
9
votes
1answer
153 views

What is the default ColorFunction for Image3D?

What is the default ColorFunction for Image3D? I find it a bit confusing that the most intense colour is not shown where the ...
9
votes
4answers
403 views

Why is Poisson Random Deviate Generation so slow?

I am generating Poisson deviates for some numerical work. Mathematica 9.0.1 is very slow in generating these random numbers, as can be seen below. ...
9
votes
2answers
392 views

In version 9 PlotLegends, how can I remove the strange edges that appear around LegendMarkers?

I'm running Mathematica version 9. I am using ListPlot to plot two sets of data. For each data set, I am using different ...
9
votes
1answer
254 views

Possible bug with second argument of Dynamic

According to the documentation, Dynamic Details & Options section, especially: For interactive mouse operations Dynamic[expr,{f_start, f, f_end}] typically ...
9
votes
6answers
406 views

Performing Computations on Sets

I would like to find a permutation of $\quad S=\{\frac{1}{10}, \frac{1}{2}, \frac{4}{7}, \frac{3}{5}, \frac{2}{3} \}\quad$ that maximizes the sum of theses elements raised to unique powers: ...
9
votes
0answers
155 views

Compile not correctly initializing a variable defined inside Module

In the following example, inside the minimumX's Module, x is initialized to 1, but the ...
9
votes
1answer
231 views

Apply a Function Pairwise

I'm new to Mathematica I'd like to apply Mean pairwise to a list to achieve the following. ...
9
votes
0answers
159 views

HorizontalGauge causes problem with ScalingFunctions -> “Log”

I am trying to use HorizontalGauge[Dynamic[expt], {0.1, 100}, ScalingFunctions -> "Log"], i.e. a gauge with a logarithmic scale. This creates an error, a graph ...
9
votes
2answers
268 views

Change associativity of the @ operator

The @ operator in Mathematica is right-associative by default, i.e. f@g@h evaluates as f@(g@h) Is it possible to make the ...
9
votes
1answer
2k views
9
votes
1answer
695 views

Functional programming and Do loops

I'm writing a Monte Carlo simulation. I'm using a Do loop to create the different simulations, iterating over different ...
9
votes
1answer
327 views

Defining Tags in Reap

I am trying to use Sow/Reap to replace Append in my code. The problem is that I need to ...
9
votes
3answers
989 views

BarChart frame labels

This barchart was tricky to style, and I had to resort to the legacy BarCharts`package. Any ideas how to omit the labels from the bottom edge? Ideally I'd also like ...
9
votes
1answer
231 views

What default theoretical distribution does Mathematica use in PearsonChiSquareTest?

I used Mathematica's function PearsonChiSquareTest to test whether the data were drawn from a normal distribution. As in the reference, I expected Mathematica to compare the result to a normal ...
9
votes
2answers
564 views

How to set row height in Grid?

I always thought that Grid (and the underlying GridBox) and the general handling of tabular objects is a bit weird in ...
9
votes
5answers
260 views

Fill out blanks with a upcoming number in a list?

I have a bunch of arrays looking like this: {"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", ...
9
votes
2answers
1k views

InterpolationOrder for ContourPlot

How do I acheive something like InterpolationOrder in ListContourPlot for ContourPlot? My ...
9
votes
4answers
1k views

How to sum up subelements of a list of unknown length

I'm simply looking for the {}+{} function for sublist elements of a list: (Parallel sums of elements) ...
8
votes
1answer
131 views

On using DiracDelta[t] in OutputResposne in version 10. Different result from version 9

I am baffled by this. I was trying to run same example I had working in version 9.01 and found now I get empty plots. The example is here . Here is a simplified version of the above. The same exact ...
8
votes
3answers
148 views

Ticks disappear in Graphics3D with Epilog

Normally, you can enable Graphics3D to show tick marks by doing this: Graphics3D[Sphere[], Axes -> True] But in ...
8
votes
1answer
245 views

Why is Dataset upset by division by zero?

Consider this example: ds = Dataset@Transpose[<|"a" -> {1, 2, 3, 4, 3, 2, 1}, "b" -> {6, 5, 4, 3, 2, 1, 0}|>, AllowedHeads -> All] Now say I ...
8
votes
3answers
384 views

Mathematica 10 Graph issue

fixed in 10.0.2 Please try to evaluate this code in Mathematica 10. ...

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