All Questions

2answers
27 views

Covering cases with zero and 1 exponent when defining function

I have a function that I am defining as (assume m,n,a,b are non-negative integers): myfcn[x_^m_ p_^n_, x_^a_ p_^b_] := basefcn[m, n, a, b]; and then extending to ...
0answers
89 views

Proving the hairy ball theorem using xAct

I would to formally prove the hairy ball theorem in Mathematica, initially just for the $S^2$, and then see about generalizing. An approach I thought about to use the xAct package to define $S^2$ and ...
0answers
5 views

Wavelet expansion of given function (as opposed to DWT of given data)

To illustrate, say I take the following function (the reason for the square root will be apparent soon) ...
1answer
101 views

Bug in ParallelTable after evaluating another function using NDSolve and FindRoot. What is wrong with this inverse?

I am trying to find the inverse of a function which is defined through NDSolve and NIntegrate. The question is pretty similar ...
1answer
66 views

How to sort the functions in a Package?

Once a Package like abc has been installed, we can use "?abc*" to scan all the functions defined in this Package. Now I ...
2answers
1k views

How can I use the Klingon alphabet symbols?

Note: This functionality is presently missing. See: How to add named characters to Mathematica 10? Mathematica apparently supports the Klingon alphabet: ...
5answers
556 views

Will Version 9 functions all work in Version 10?

Having developed a substantial code base in Mathematica 9, leads me to ask these important questions prior to downloading and installing Mathematica 10. Will any Mathematica functions from the ...
2answers
41 views

Algebraic expressions on pure functions

I would like to know how to perform algebraic operations with pure functions. Simple version version: Here's a silly toy model: I want to transform the algebraic expression Sin*Cos into the ...
0answers
19 views

Different outcomes during Symbolic Integration using MMA-10

I would like to know the underlying reason for different outcomes for the two integration operation below. One of them includes a few assumptions, otherwise both have the same integrand: ...
0answers
9 views

How can I get the documentation index for add-on packages working in Mathematica 10?

Using the methods described in the answers to Creating cross-version compatible documentation with Workbench, one can use Wolfram Workbench to create documentation for user packages that works ...
2answers
94 views

Density plot of city data

I try to solve a bit tricky problem. I want define line (or vector) between some geographical points with weights (for example how many transactions has been done between these cities). I tried this ...
1answer
53 views

Possible Bug in ProbitModelFit when used in a Dataset

Since upgrading to Mathematica 10 on Mac OSX I have come across a number of instances of this error, which occurs using Probit and Logit model fit. A bit of googling show this is something to do ...
4answers
661 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?
2answers
176 views

Coordinate extraction and manipulating graphs as graphics objects

Consider the image below: GraphData[{"Wheel", 7}] Is it possible in Mathematica to lay several of these Graph along each ...
2answers
164 views

Converting a string into a nested list of strings

The following string can be converted easily into a list with ToExpression ...
6answers
626 views

Creating cross-version compatible documentation with Workbench

Wolfram Workbench allows you to create documentation for your own packages that is similar to the build-in documentation center. Integrating this type of documentation with the documentation center is ...
4answers
1k views

How to get actual triangles from DelaunayTriangulation[]?

The ComputationalGeometry package has a DelaunayTriangulation[] function. It returns a list of points connected to each point, ...
1answer
303 views

How to write plain Greek in a text cell

If I create a text cell and type some greek text, most of the symbols are italics as if the cell had an Input style. It doesn't happen with latin characters. I recollect that it is impossible to fix ...
1answer
60 views

How do I speed up a plotting of NIntegrate when repeated multiple times inside Plot?

I am studying a set of functions (many of which I know only as a definite integral) and I have assembled into a list. Here is a sample: ...
2answers
442 views

Voronoi Diagram: Displaying site specific color in a voronoi diagram

I am using Voronoi Poligonization as a support form simulating island erosion; my data are the output of VoronoiDiagram, ...
0answers
29 views

Shortcut for result before previous result? [on hold]

Suppose I execute a large computation and get a huge list back In[1]:= LargeComputation[] Out[1]:= {32,42,...12030...,220313} Then I do something with that ...
1answer
65 views

The front end encountered an error while processing a “NotebookPredictions” packet

I occasionally get the error The front end encountered an error while processing a "NotebookPredictions" packet. I cannot find any documentation for this error message online. It does not ...
4answers
85 views

Plot range of a 2-dimensional function as a function depending on one variable

I want to plot a function of 2 variables x and y, for discrete values of y, like: ...
2answers
151 views

Export Plots to PNG in Printout Style

When creating a plot in Mathematica 10 (OS X 10.9.4 and Win 7) the FrameLabel and Ticks are greyish and only the Frame itself is black (see Screenshot bellow). Only when exporting the plot to PDF all ...
2answers
377 views

How can I prevent ColorFunction from disabling antialiasing in graphics?

When I use ColorFunction, the appearance of my plots is ruined, changing from this which has the normal smooth lines and antialiased fonts, to this in which ...
1answer
291 views

rasterListContourPlot With PlotLegends in Mathematica 9

Jens Nöckel has write functions about (List) Contour Plots with rasterized shading in Mathematica: http://pages.uoregon.edu/noeckel/computernotes/Mathematica/rasterContourPlot.html It works well. ...
4answers
2k views

Saner alternative to ContourPlot fill

I am producing a large number of ContourPlot objects, which when exported generate notoriously large PDF files because it basically generates lots of little ...
7answers
4k views

Changing the background color of a framed plot

I frequently generate framed plots like this: Plot[Sin[x], {x, 0, 2 \[Pi]}, Frame -> True] Is there an easy way to change the background color of the framed ...
1answer
102 views

RegionPlot3D run forever when plotting 3D ParametricRegion

when working with 2D, RegionPlot works fine with ParametricRegion as can be seen in this example: ...
2answers
302 views

How to plot several functions without jumping? (multiple eigenvalues of a system as functions of 2 parameters)

I've been working on this research problem for months with some success by no global/proper solution to the problem. So I have square, Hermitian matrices of various sizes ($8,20,38$ dimensions) with ...
2answers
361 views

Distorted graphics when using custom ticks and AspectRatio -> Full

I am having a problem using custom tick specifications along with AspectRatio -> Full. The problem affects both Ticks and ...
0answers
47 views

Hyperlinks not preserved when saving in PDF format in MMA V10

I usually create my course contracts in Mathematica and then save them in PDF format. The notebooks include hyperlinks and these have transferred to PDF without problem over the last several versions ...
4answers
587 views

“Indexing” a vector

I need to "index" a vector according to the first occurence of its distinct elements. I have written ...
1answer
38 views

DateListPlot does not accept PlotRange or GridLine specifications using DateObject

This doesn't work... ...
1answer
35 views

Importing additional custom data in DIMACS format

I have graphs in DIMACS format, with vertex colors specified. The vertex colors are denoted by lines n u c, where u is the ...
3answers
179 views

Manipulate crashes after running 4 minutes

The following code generates the familiar 3D-plot: ...
0answers
38 views

I need to code/write a Vector Autoregressive Model VAR(p) as a function of the parameters. There is no estimation, nor Data involved, this is a "population" exercise: Marginal autoregressions $... 4answers 224 views Mismatch between numerical and analytic evaluation of an integral I evaluated the following integral NIntegrate[Sqrt[r] Abs[Cos[(k + 1/2) Pi r]], {r, 0, 1}] getting as a result 0.413232 for ... 2answers 291 views Mapping data on Archimedes' spiral [duplicate] I would like to map my data on Archimedes' spiral and preserve the distance between points on the curve. The test data consists of 20 evenly spaced {x,y} ... 5answers 2k views Generating evenly spaced points on a curve In the KnotData package a simple command such as points = Table[KnotData[{3, 1}, "SpaceCurve"][t], {t, 0, 2 Pi, 0.1}]; will ... 2answers 234 views How to Rasterize in “Printout” style I am trying to ascertain how large a justified text block will be when printed by rasterizing it in the "Printout" style environment. However, ... 0answers 30 views Retrieve style definitions [duplicate] How can I retrieve the style definitions of a certain style within a cell, notebook or stylesheet? For example how can I retrieve the FontColor and ... 1answer 28 views Package function not called from button in a DockedCell expression Consider the following minimal example package: ... 2answers 485 views Faster way to test if an expression equals zero I want to test if expressions (mix of variables, functions and numbers) are zero valued, as fast as possible, and PossibleZeroQ is sometimes very slow. One solution ... 3answers 1k views Create triangular mesh from random list of points I have a list of points. I would like to take these points and create a mesh of triangles from them, making sure triangles don't overlap. So here's a list of points: ... 1answer 124 views Strange behavior of BoundaryMeshRegion BoundaryMeshRegion is new function of version 10. I am not familiar with the function. I want to decide whether a point is inside or outside in the Boundary using ... 2answers 305 views Why does this integral have a complex component? I wanted to find the probability of my normally-distributed random variable being at least 15, so I set up this integral: ... 0answers 27 views Labelling arrayplot - Tried using transpose, doesn't work [on hold] A section of my code generates a table of values, where the arrayplot can be found. I tried to label them but it doesn't work: ... 0answers 62 views Boundaries of graphical objects not displayed correctly I have encountered two situations where Mathematica 10 is mishandling the outer pixels of plainly simple objects. I input this: ... 2answers 75 views Can't solve equation having complex coefficients Why can't Mathematica solve$\quad\quad\frac{1-i}{\sqrt{2}}=e^{i \alpha } \tan \left(\frac{\beta }{2}\right)$with the restrictions$\alpha \in [0, 2 \, \pi)$and$\beta \in [0,\pi]\$: ...

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