3
votes
1answer
182 views

Namespaces in Mathematica

In many programming languages one can define a namespace with namespace abc How can the similar be done in Mathematica? The ...
10
votes
0answers
643 views

Using TetGen in Mathematica to get 3D Voronoi diagram

In this post, the use of TetGen for 3D Voronoi tesselation has been briefly discussed. However there is still no info about the use of TetGen to generate a 3D Voronoi diagram. The TetGen documentation ...
10
votes
2answers
310 views

Filling Fill incomplete in ListLinePlot

...
4
votes
0answers
86 views

JewishNewYear date limitation

The documentation for the function "JewishNewYear" in the "calendar" package declares that the year argument must be between 1900 and 2100. No explanation is given for this limitation. The function ...
8
votes
1answer
169 views

Quickly selecting for points in a set that are within a critical distance of points in another set

Imagine two lists of two-dimensional coordinates: listA = RandomReal[{0,100},{202,2}]; listB = RandomReal[{0,100},{97,2}]; I'm attempting to quickly generate a ...
14
votes
4answers
1k views

What is the most elegant way to display multiple graphs with a common title?

I often seek to display two graphs, side by side, with a common label over them. There is no option for adding a label to GraphicsRow, which means, I think, that I ...
3
votes
1answer
133 views

Use URLFetch in init.m

I'm not able to use URLFetch in my $UserBaseDirectory/Kernel/Init.m as it always returns ...
4
votes
2answers
219 views

CMYK colours changing

If I draw a coloured diagram like Graphics[{CMYKColor[0, 0.83, 1, 0], Rectangle[{0, 0}], CMYKColor[1, 0, 0, 0], Rectangle[{0.5, 0.5}]}] and select the red ...
4
votes
1answer
165 views

Can I compile a function containing ArcTanh?

Can I compile a function that contains ArcTanh[]? The following doesn't work Needs["CCodeGenerator`"] c = Compile[ {{x}}, ArcTanh[x]^2]; c[2.5] Mathematica gives ...
0
votes
0answers
44 views

Eigenvalues of a matrix, rhombus/hash sign [duplicate]

I wanted calculate the eigenvalues of A = {{0, 1, 0, 0}, {a, b, c, 0}, {0, 0, 0, 1}, {d, 0, e, f}} Then assigned the parameters a value ...
2
votes
1answer
176 views

Fraction Alignment in Plot Export to JPG [duplicate]

I've produced some plots that have fractional tick labels on the horizontal axis and they look fine. ...
0
votes
0answers
34 views

Custom FrameTicks not working [duplicate]

I would like to have a custom ticks on x-axis on my ListPlot, but nothing is showing, what am I doing wrong? ...
5
votes
1answer
234 views

Embedding StreamPlot in Graphics3D

I am trying to visualise the action of the infinitesimal generator of a Lie group on the solution of a 2-ODE system drawn in the 3D space (t,y1,y2): t is time and y1,y2 are the two dependent ...
1
vote
1answer
179 views

Input text field GUI [duplicate]

Is there a way to input multiple rows of text and save it as a variable? Like an InputField, but with multiple rows? I would like to make a simple text redactor, so that I could enter a text and then ...
7
votes
2answers
163 views

Can I Print to a different notebook? (within the context of the same kernel)

Please imagine a simple loop: For[i=1,i<=100,i++, Print[i]; ]; We can ask Print[] to output $(1,2,3,4,...)$ to a ...
7
votes
1answer
102 views

Why does Rescale performance vary significantly based on the real number values in a list?

I have a list of the form: testList = Table[{Flatten[RandomReal[{-200, 200}, {1, 2}], 1], RandomReal[{-200, 200}, {69, 2}]}, {i, 1, 100}]; And I would like to ...
3
votes
2answers
123 views

Creating a trigger to update a previous ListPlot output with new data

Imagine I'm running a loop that's manipulating and changing elements in an array. Is it possible for me to create a ListPlot output in my notebook that updates on ...
6
votes
0answers
155 views

Finding hidden treasure (aka finding undocumented functions) [duplicate]

I was searching for a way to determine if a point is within a polygon and stumbled upon rm -rf's answer. (actually, I really wanted to find a point within a ...
6
votes
1answer
608 views

How do I calculate Standard Deviation confidence intervals in Mathematica?

I have a series of simulation results and I would like to demonstrate how the confidence interval for the mean and standard deviation decrease as the number of results increases. I have done this for ...
2
votes
1answer
709 views

How to show factorial in expanded form with variables

When evaluating the following (Factorial[n + 1]/Factorial[(n + 1) - (k + 1)]) with Mathematica 9, the result is sent to output as ...
5
votes
2answers
1k views

How to find the non-differentiable point(s) of a given continuous function?

For example, the non-differentiable point of the function $f(x)=|x|$ is at $x=0$. How to find the non-differentiable points of a continuous function that is defined numerically?
4
votes
2answers
671 views
9
votes
1answer
585 views

Example program for calling Mathematica from C

I want to call Mathematica from a C program. Suppose I have two numbers x =2 and y=3. I want to define the x, y in a C program and call Mathematica and I want Mathematica to do the sum and return me ...
8
votes
3answers
446 views

Create sine function with random increase in phase

I am trying to simulate a signal that randomly increases its phase, so far I have tried two thing but neither worked. I usually use matlab but I want to learn some Mathematica so I thought I would try ...
11
votes
1answer
332 views

Can Manipulate controls have the option Appearance -> “Labeled” by default?

I was wondering if there's a way to tell Mathematica to use the option Appearance -> "Labeled" for all Manipulate commands by ...
4
votes
1answer
194 views

How to change the aspect ratio with drawing tool?

I'm drawing an image in editing an slide show with the drawing tools. But the aspect ratio of the created drawing seems fixed and not changeable with mouse dragging the border and corner as in other ...
6
votes
2answers
3k views

Need 4D plot (3D + color for function) [duplicate]

I have a function f(x,y,z) of three variables and some constants: ...
11
votes
1answer
760 views

Solving Killing equations

Is it possible to solve Killing equations in Mathematica for a general vector? I am looking for a way to create Killing equations and then find what the vectors are, but I have a problem with this. ...
4
votes
1answer
105 views

Error from BoundedDiagram

I cannot understand the meaning of the error BoundedDiagram::notuniq: BoundedDiagram requires that boundary vertices lie in unique Voronoi polygons. >> BoundedDiagram::nobd: Bounded ...
3
votes
1answer
282 views

Vertex Labeling Problem in a Graph

I am using following codes to create a graph. ...
2
votes
1answer
114 views

Can Map operations be compiled or otherwise sped up for large lists?

I'm performing a series of Map operations in the following script: ...
1
vote
1answer
481 views

Custom ticks failing with Frame

I know I can manipulate ticks: ...
14
votes
1answer
493 views

Size distribution of nanoparticles from a transmission electron microscopic image

I have found a research article about Martian sand grain size determination from the image using Mathematica (Figure 2 in the linked article). They have not provided any detail of the methodology. It ...
2
votes
1answer
408 views
6
votes
2answers
640 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, ...
1
vote
2answers
207 views

How to apply function f for each time value t, to each pixel from image, resulting in t images

I have a 2D array of complex values and I want to apply a function to every entry of the array, for every timepoint t in a list. I know how to apply my function to one entry for every time t in a ...
3
votes
3answers
550 views

StreamPlot using NDSolve gives error messages

StreamPlot[{x[0], x'[0]} /. NDSolve[{x''[t] == 1, x'[0] == v0, x[0] == x0}, {x, x'}, {t, 0, 1}], {x0, -2, 2}, {v0, -2, 2}] The above code gives me the errors ...
2
votes
2answers
65 views

Constrain movement of Locator (increased t-value)

Continuing with the code at the end this topic, I am now searching for a way of constraining the movement of the locator so that it doesn't "jump" from one "part" of the graph of f to another. So, if ...
10
votes
2answers
166 views

Can I define new graphics directives?

Is it possible to define new graphics directives? For example, suppose I want to be able to use the following code: ...
2
votes
3answers
263 views

Minimization problem

How could you find the smallest constant $c$ that satisfies $$\frac{3^{3k}e\sqrt{3}}{\pi\sqrt{k}\;2^{3/2+2k}} \leq 2^{\;c\;k}$$ assuming $k\geq 1$ is an integer. You can of course take logs of ...
4
votes
1answer
250 views

Creating a function to simplify WolframAlpha query

When I can't remember an integral I usually just query wolfram and have it show steps. This was my naive attempt at trying to make a simpler function. ...
6
votes
2answers
184 views

Get information about a stack of images, without plotting it

A very long time ago I used Mathematica for a few months and found it very intuitive. Now for my work I use MatLab. I was just trying some stuff out with Mathematica again and there is something I ...
-1
votes
2answers
111 views

Palette for pasting matrix templates into a notebook

How I can build a palette of matrices?. So, I would like a palette with a 3x3 square matrix, a square matrix 4x4, 1x3 row matrix, 1x4 matrix row, column matrix 3x1 and 4x1 column matrix.
2
votes
1answer
118 views

Interaction between two sliders that update the same variable

I'm basing this on the code found in the Introduction to Dynamics. I added one more slider which doesn't use the "round and snap" feature given in the link above: ...
2
votes
1answer
85 views

Constrain movement of Locator

Continuing the discussion started in the thread here, I've tried to recreate the code from scratch. I thus looked to constrain the movement of a locator to the graph defined by ...
7
votes
3answers
300 views
4
votes
2answers
148 views

Speeding up Position for finding the indices of a small number of integer elements in a large matrix

I have a large $100 \times 4000$ element matrix composed of integer elements, testMatrix, and I was to use Position to find the ...
2
votes
2answers
109 views

Extracting variables from Hold expression

For example I have some global assignments x=1;y=2;z=3 and an expression Hold[x*y/z]. How can I now extract variables ...
0
votes
0answers
52 views

Construct matrix B from columns of matrix A? [duplicate]

Starting with Mathematica and working with matrices, I am looking for a way to construct a new matrix B from columns of matrix A. For example, matrix a has 8 columns and 4 rows, I want matrix B to be ...
0
votes
1answer
148 views

Generating an array using list values at indices corresponding to entries in a separate list satisfying some criterion

Imagine one has an array of integer value sets that looks like this: ...

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