7
votes
1answer
453 views

RootSum result manipulation/simplification

Consider the sum sum1 = Sum[ k/( k^7 - 2 k + 3), {k, Infinity}] ...
4
votes
1answer
291 views

Upon opening my notebook, I must evaluate cell for code to work properly

I am new to Mathematica. Once I evaluate the cell containing the code, my Manipulate works as desired; however, if I open the file and do not evaluate the cell, the Manipulate goes haywire. Can ...
9
votes
3answers
725 views

How do I remove the top bar and bottom bar from the Mathematica window?

Any idea how to remove the top bar saying "Wolfram Mathematica .... Demonstrations MathWorld Studenforum Help" from the Mathematica main window (see screenshot). It has no use to me and it ...
23
votes
2answers
2k views

How can I create a glass distortion effect in an image?

I'd like to overlay a glass jar onto an image with realistic light bending. Can anyone think of a way to automate this effect? Perhaps this can be done with the raytracing package Rayica / Optica? ...
0
votes
1answer
278 views

how to dynamically change color of setterbar

I have a SetterBar with 3 values. I want that when I hover the cursor on any of the SetterBar value,it changes its color and ...
2
votes
2answers
240 views

Applying a function to list of points and plot the results in ListPlot

Assume there are three groups of 2-dimensional coordinates data = RandomVariate[NormalDistribution[#, .25], {15, 2}] & /@ Range[3]; Is there a way to ...
1
vote
2answers
190 views

Strange integration result

In Mathematica 8, the Integrate command sometimes strangely integrates polynomials yielding unsimplified (and unexpected) fractional results. As an example, the line: ...
4
votes
2answers
952 views

How to store value in a For loop

I am using two For loops. When the inner loop finishes, I don't want to print but I want to store the result from the inner loop in some variable so that I can call ...
5
votes
1answer
203 views

Simulating CoordinatesToolOptions (for CDF) & the Inflexibility of MousePosition

I got two lists of equal lengths, which I show in two ListPlots, arranged in a Column or ...
8
votes
2answers
510 views

How to get the list of defined values for an indexed variable?

I would like a table with rational indexes - thus it would be practical to use a dictionary, which, in Mathematica are implemented with the indexed variables. I would like to be able to do: ...
1
vote
1answer
967 views

Calculation of Jacobians for a finite element method simulation

I'm attempting to calculate symbolic expressions for the (Newton's method) Jacobian of a Galerkin finite element method using Mathematica. It would seem that this is a perfect application for symbolic ...
17
votes
2answers
2k views

Some tutorials on formatting notebook for exporting to pdf

I love the way that Mathematica allows me to type in of formulas. It is really easy to type complicated expressions with shortcuts on the keyboard. It would be great if I could use Mathematica ...
12
votes
1answer
342 views

using MathLink for communication with external program from my C program without Mathematica

I have a compiled program with MathLink. I want to use it from other C program, without Mathematica being involved at all. If i create my program with MathLink and connect to this external program, ...
12
votes
4answers
2k views

Finding elementary cycles of (directed) graphs

I need to enumerate all the simple cycles (i.e. elementary cycles where no vertex is repeated other than the starting) of a graph which has both directed and undirected edges, where we can treat the ...
5
votes
0answers
113 views

Clear Citation Style Cache

How can I clear the "Citation Styles Cache" created when you use the EndNote citation management feature for the first time in Mathematica. The Citation Management tutorial indicates that such a ...
17
votes
2answers
2k views

What is the fundamental difference between ArrayPlot and MatrixPlot?

Suppose I have a matrix called data. It seems that I can plot data using either ArrayPlot or ...
7
votes
1answer
626 views

How to express the original ideal elements in the Groebner basis?

Suppose I call GroebnerBasis[{f1, f2, ...}, {x1,x2, ...}] The output is a list {g1,g2,...} For each $g_j$, there should be ...
3
votes
1answer
288 views

Evaluation of self-defined functions

I defined a function that I call disc which I want to minimize later. The function is defined as ...
1
vote
1answer
741 views

How do I use a matrix that has a variable?

I seem to be getting an error whenever I try running this piece of code. Matrix12[n_] := {{1, 0}, {0, {\[Kappa]1[n]}/{\[Kappa]2[n]}}} I've already defined the ...
9
votes
3answers
662 views

How to ensure that Polygon[list] plots a simple polygon?

Consider the following code which plots a triangle. p = {{0, 0}, {.2, 0}, {0, .2}}; {Cyan, Polygon[Dynamic[p]]} // Graphics Then adding (for example) ...
62
votes
11answers
12k views

How to check if a 2D point is in a polygon?

Background: I use code from An Efficient Test For A Point To Be In A Convex Polygon Wolfram Demonstration to check if a point ( mouse pointer ) is in a ( convex ) polygon. Clearly this code fails for ...
2
votes
1answer
211 views

Orthogonalize method, keeping to binary vectors

The built in function: Orthogonalize[m] where m is a list of vectors returns a orthogonal basis for m. However, I want to stick to the binary field. However, I ...
1
vote
3answers
1k views

Span of a set of vectors over a given field

Could anyone help me find a function that takes as inputs: a set $S$ of vectors and an integer $q$ and outputs: the Span of $S$, where $Span[S]$ is a vector space over the field $F_q$. If its ...
1
vote
2answers
175 views

Using patterns in ReplaceAll to extract elements from tuples at arbitrary depths

Please consider the following: I need to extract from MyList all last parts of each 3-tuple. ...
10
votes
2answers
279 views

Strange results while nesting scope constructs?

I did a handful of tests with Block, With, and Module and had a couple of new surprises. ...
-1
votes
1answer
297 views

Speed Up SphericalPlot3D

I was wondering if I could speed up SphericalPlot3D? I tried editing PlotPoints, and ...
1
vote
1answer
148 views

How to switch between different CDFs in CDF Player?

I recently got a Mac. It has CDF Player, but not Mathematica. How do I get CDF Player to switch between different CDFs on OS X Lion? Edit I forgot to mention that I want to know how to switch ...
4
votes
2answers
230 views

Simpler way to repeat an execution with 2D points?

q has the coordinates of quadrilateral. I can get the output below with brute-force but I want to find a simpler solution, perhaps something like f<-q[[1;;2]]. ...
9
votes
3answers
525 views

Compiled function error - nontensor object created

I'm trying to optimize code that uses Position MANY times. The following toy code works: ...
2
votes
1answer
256 views

How can I permute a multiset?

I have a multiset {1, 3, 3, 1, 2} and would like to randomly permute the classes like so: {2, 1, 1, 2, 3} or {3, 2, 2, 3, 1}, what is the simplest and most efficient way to do this? In reality the ...
8
votes
0answers
299 views

Page Break Adjustment In Long Documents

Has anyone else had trouble in relocating page breaks in a long document? In a ~45 page long document I wanted to keep certain things on the same page. The system worked on the first three or four ...
2
votes
2answers
265 views

Evaluation of Notebook chosen by FileNameSetter

Please consider the following: I have created a GUI where I can choose the path of a notebook (which I need for later calculation) via ...
3
votes
0answers
214 views

LeastSquare Solution for the Continuous Time Lyapunov Equation

I have been working with a problem which involves solving the continuous time Lyapunov equation $$A R + R A^\top = G$$ for the symmetric positive definite matrix $R$. Here $A$ is real, invertible ...
1
vote
1answer
565 views

Why is the CTRL + / not working?

I've learned how to use this shortcut to input fractions in the 2D form, it worked nice on my notebook but I can't make it on my desktop. Any tip on what could be happening?
4
votes
1answer
406 views

Mathematica's external controllers?

While reading the Manipulate reference I've noticed this line: What are the available external devices for that? Some months ago I was thinking on what would be needed to use a MIDI Controller ...
3
votes
2answers
988 views

Map a 3D plot into plane

I have a 3D plot like: ...
5
votes
1answer
114 views

How to insert or use the PackageTemplate?

In the system resource file MiscStrings.tr there is a template: ...
5
votes
1answer
201 views

Enhancing GraphUtilities' GraphEdit

One thing I use Mathematica for is building molecular graphs. Until now, I've been content with generating an adjacency matrix from SMILES data, and passing that to ...
11
votes
4answers
646 views

Assessing argument type in set delayed function definitions

I'm wondering how to properly assess the type of arguments passed to functions defined with :=. I want my functions to be the most efficient, unambiguous and clear ...
12
votes
1answer
254 views

Programmatically minimize mathematica?

I can minimize a notebook easy enough with Mathematica code, but how does one minimize all of the Mathematica front end? Just as if you clicked the minimize button on the menu bar? This is for ...
4
votes
1answer
400 views

Importing tabular data that has been exported from Evernote

In Evernote you can embed HTML tables in the note. You can then export them to an xml format with the extension enex. I am trying to get the data from the table imported into Mathematica. Here is the ...
11
votes
3answers
2k views

Drawing outside Plot area

I want to programmatically draw some objects outside the Plot area in my Plot's Epilog, like in this dummy: I found PlotRangeClipping and hoped that would be the ...
10
votes
1answer
154 views

Notebook with a WindowOpacity too small becomes “click-through” for mouse

I created a notebook and was manipulating its WindowOpacity option: ...
7
votes
1answer
196 views

Is this a good way to assign a Solve result to a function?

My code: ...
65
votes
4answers
9k views

Programmatic approach to HDR photography with Mathematica image processing functions

The High dynamic range imaging (HDR or HDRI) direction in photography and image processing became very popular recently. Besides obvious photo art applications (see examples), there are many great ...
10
votes
1answer
4k views

Complex number operations: telling Mathematica variables are real

I want to do Conjugate[a + b*I], but when I do that, the solution is Conjugate[a] - I*Conjugate[b]; when for me, a and b are ...
3
votes
1answer
554 views

How to highlight various parts of a plot

I'd like to show students a graph of a function, say $(x,y)\mapsto\sqrt[3]{x^3+y^3}$, and then highlight its various properties connected with (non)differentiability at certain points etc. Having ...
20
votes
1answer
1k views

Programmatically move the cursor to a desired location on the screen

Is it possible to set/move the mouse pointer's location directly from Mathematica without using external tools like Run["xdotool mousemove x y"]?
14
votes
3answers
756 views

Take screenshot of the entire desktop using Mathematica

Is it possible to get a screenshot of the entire desktop directly in Mathematica? I am on Ubuntu running Mathematica 8. For some reason GUIScreenShot[] fails. But ...
7
votes
1answer
580 views

Very fast way to do a coordinate frame transform

I need a function that rotates and translates a huge amount of line segments. For example, I have a set of line segments in the form {{x0,y0,z0},{x1,y1,z1}} ...

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