3
votes
1answer
477 views
Methods to speed up numerical NDSolve, NIntegrate,
I am not very used to do numerical simulations on Mathematica. Do you have any ideas how to improve i.e. speed up my code?
...
3
votes
1answer
96 views
Right aligning a button in a dialog
What is the best way to right align a button in a dialog window, regardless of the window's WindowSize?
Here is a resizable window to test on:
...
5
votes
3answers
145 views
How to preserve clipping when exporting a framed histogram with font embedding?
I work with histograms and would like to export it to EPS format. I've noticed that my exported image loses the PlotRangeClipping option that I set up when I export the plot. This is true for at least ...
16
votes
1answer
219 views
Saving my code before cell evaluations: Insurance against front end hanging
I guess my programming working style is not unique. I develop programs one cell at a time, and when I have some confidence about what I did, I put all my mess together refining the code, building up ...
9
votes
1answer
200 views
Possible to import Excel formatted text?
Is it possible to import Excel text markup such as underlines? For example:
Yet
...
4
votes
0answers
75 views
Mathlink and Parallelization [duplicate]
Possible Duplicate:
How to run mathlink external commands in parallel?
Abstract
I have a binary file compiled to work with MathLink. I can install the file and run the component functions ...
11
votes
2answers
600 views
Finding a Concave Hull
I have a 3d clustered data:
Is there any other way to get concavehull of 3D data points?
3
votes
0answers
75 views
AbsoluteOptions of a Histogram with PlotRange [duplicate]
Possible Duplicate:
Mathematica: Retrieving PlotRange from Histogram
I would like to evaluate the AbsoluteOptions of one of my ...
16
votes
4answers
549 views
Create colour with given lightness value
How can I create a colour of my chosen hue with a given fixed lightness level?
For example, how can I create a reddish colour, col, so that ...
25
votes
2answers
1k views
Efficient Langevin Equation Solver
This question is not about good algorithms for solving stochastic differential equations. It is about how to implement simple codes in Mathematica efficiently exploiting Mathematica's programming ...
6
votes
4answers
237 views
Can I stop edges in graphs from drawing on top of the vertices?
Consider the following
testadj = RandomVariate[BernoulliDistribution[0.15], {50, 50}];
AdjacencyGraph[testadj, VertexSize -> Large]
The nodes are almost ...
4
votes
3answers
167 views
Exporting a rasterized Row of Graphics
I'm running some code based on @R.M.'s answer to this question to create a couple plots side by side.
I want to export the plots rasterized to a png. However, when I ...
-2
votes
2answers
319 views
How to write output in TraditionalForm into external text files?
I'd like to write output in TraditionalForm into external text files ofile.txt. I tried to use
...
4
votes
1answer
504 views
Export Table from Mathematica into specific cells Excel
How can I export a table to Excel - to specific cells, e.g. D1-E2?
Background: I want to compare results, and it's easier to have the results on one spreadsheet.
I'm using Mathematica 6.
This is my ...
41
votes
5answers
5k views
How to create hedcut style images?
Yesterday the hedcut style was brought up in chat. How can we create a hedcut-like style automatically in Mathematica, using a photograph as a starting point?
I am looking to create a similar ...
1
vote
4answers
383 views
How to find pixel position in a graph , given two points?
I have a graph where on my Y axis , I have price and on X axis I have period/time.
My range on Y axis is from 10 (lower limit) to 200 (upper limit), so to draw the point on graph I need the Y ...
1
vote
0answers
125 views
Package autoloading not working in CDF and Player Pro
I have made a package
BeginPackage["top`"]
t[x_]:=MessageDialog["This is top"]
t1[x_]:=MessageDialog["This is top1"]
EndPackage[]
and used the code of this ...
0
votes
1answer
263 views
If I know the steady state vector of a stochastic matrix, can i recover the matrix? [closed]
By steady state vector I mean the eigenvector which has an eigenvalue of 1. So is there a way to at least iteratively approximate the entries of the stochastic matrix?
Thanks.
8
votes
3answers
865 views
Excel Headers --> Mathematica
I have a large Excel .xls file. Miniature version shown below:
(formatting should appear as two columns...)
...
24
votes
1answer
305 views
Tool to locate bloat in a notebook?
In developing a notebook, I often find I have created a very boated file that takes a long time to save. I would like to slim it down. It is usually the result of graphics and images, but they may be ...
19
votes
3answers
456 views
Build a refined grid based on intersecting line
I honestly have no idea where to begin with this problem. In summary, I have a 2D coarse grid with an intersecting line. For an easy example, let's assume it's a 4x4 grid.
I wish to pass through ...
5
votes
3answers
215 views
Is there an easy way to put time ticks on a parametric plot?
I have a parametric plot showing a path of an object in x and y (position), where each is a function of t (time), on which I would like to put a time tick, every second let's say. This would be to ...
17
votes
2answers
630 views
Code Readability and Object-Oriented Code
The basic problem I have been running into is making readable code, where in other languages I am more familiar with I might have been using class or struct like objects. For example, you can imagine ...
5
votes
3answers
186 views
Is it possible to snip a certain number of pixels from a specified side of an image, without specifying the image's final width and height?
It seems that ImageCrop allows one to specify the final size of the image. For example, ImageCrop[image, size, spec] crops ...
-2
votes
1answer
118 views
24
votes
5answers
708 views
Create magnified call-out loupe effect on image
I'm trying to create a Mathematica Manipulate that generates a graphical call-out using a 'loupe'-style or magnifying glass enlarger - a possible solution is shown ...
2
votes
1answer
180 views
Manipulating an arbitrary-precision ContourPlot
I have a function, say
minimizeme[ω_][β_][ϵ_] = ϵ^2 ω-Log[2 (Cosh[2 β]+Cosh[2 β ϵ])]/(2 β);
I want to make a high-precision dynamic ...
2
votes
1answer
329 views
Function output from DSolve
I want to get a function as output form DSolve.
For Example :
sol = DSolve[{Q''[t] + 40 Q'[t] + 625 Q[t] == 100*Cos[10*t], Q[0] == 0, Q'[0] == 0}, Q[t], t]
I ...
5
votes
2answers
268 views
Sharp ListDensityPlot
I have some quantity varying with time (horizontal axis of the plot): it first oscillates then it has a jump (larger than the amplitude of the oscillations), then it continues oscillating. I have that ...
0
votes
1answer
128 views
How can I load packages automatically after reopening Mathematica [duplicate]
Possible Duplicate:
Automatically load packages at startup
I have made two packages "Package1" and "Package2". Package2 calls Package1. it works fine.But everytime I am reopening ...
5
votes
3answers
1k views
Mathematica function intersection points with 3D grid
I need to produce a 3-dimensional equispaced grid over a given function in a way, that I can calculate intersection points of the function with the grids edges.
So my first question is how to produce ...
13
votes
3answers
514 views
Creating diagrams for category theory
Lately I've been doing algebra and I have found myself drawing a bunch of diagrams when I attempt to solve a problem. Most of the diagrams are very simple so I thought, I bet I can do this in ...
10
votes
6answers
558 views
How do I check if any element in a list is positive?
As a simple example of what I would like to do, suppose I have a list a of all real numbers. I would like to perform a simple check to see if some element of ...
6
votes
2answers
270 views
How to insert guide-lines in graphics without specifying range?
Is it possible to insert guide lines in Graphics - for example a horizontal line through y=0 coordinate without specifying the range of the line?
Originally I assumed Infinity might do the trick:
...
10
votes
2answers
795 views
How do I make framed plots the same size?
Suppose that I have two plots, plot1 and plot2. The plots have different ranges and different axes. Here is a fictitious ...
3
votes
1answer
316 views
Removing clipping masks from exported PDFs
I usually export graphics from Mathematica as PDFs which I tweak with Adobe Illustrator. When most plots are exported from Mathematica as PDFs they contain a large number of mostly useless clipping ...
4
votes
3answers
314 views
All curves in plot have the same style. Cannot be fixed with Evaluate[]
Usually, when I plot multiple curves in Mathematica
Plot[{x,x^2,x^3},{x,0,1}]
they are given different colors. However, if I try to construct a list inside the ...
4
votes
1answer
90 views
How do I force columns in a Grid to be equally spaced?
Suppose that I have this table tab, which I display using Grid. Is it possible to force the columns to be equally spaced? All ...
3
votes
3answers
92 views
In Grid and using Frame, how can I only frame the header cells?
Suppose that I use Grid to display a table tab. I did the following, which frames all cells:
...
5
votes
3answers
188 views
Proper way to handle free variables in manipulate/plot?
It took me a while today to figure out that Manipulate (used with Plot) requires that the variable I'm manipulating be an actual ...
0
votes
2answers
281 views
How to generate table without comma and bracket or get rid of those?
I want just data without comma and brackets. Even TableForm is not working for me.
For example, the general pattern of my table is
...
15
votes
1answer
369 views
Mouse motion heat map - live visualization and analysis
Mouse motion heat map is an great way to study spatial attention distribution, styles of movement, reaction, etc. I am trying to design a code that visualizes such heat map. The requirements: 1) It ...
21
votes
0answers
299 views
How is pattern specificity decided?
Mathematica has a notion of pattern specificity, which is a partial ordering on patterns.
The rules (e.g. DownValues, ...
7
votes
0answers
254 views
Sensitivity Analysis: Global Sensitivity and Screening
I have a model which accepts several input parameters and now I want to study the sensitivity to certain parameters as described in here:
Cross Validated Answer and in Wikipedia.
There is also a link ...
8
votes
2answers
237 views
MathLink and C++ vector container
The Problem.
I have a C++ class that does some computations, and returns a C++ vector object (the length of which can possibly vary with each run).
I want to store each of these vectors as a list in ...
20
votes
6answers
2k views
Circuit drawing in Mathematica
This past semester I taught an introductory electromagnetism course and had quite a nice time using Mathematica to draw all sorts of figures and diagrams (mostly for problems and etc.). However, I was ...
5
votes
3answers
419 views
How to use results of NDsolve[] for further solving of ODEs?
I have a system of ODEs with 10 eqns. I can solve the first 5 independently. How can I use those results to solve for the remaining 5?
An easy example would be
$\dot{x}=f(x), \quad
\dot{y}=g(x,y)$
...
6
votes
1answer
196 views
Buggy Reduce/Resolve function?
It seems to me that this is a clear-cut case of Mathematica actually producing the wrong answer (with no warnings).
I'm trying to express the fact that for any integer, there exists a factorization ...
18
votes
1answer
267 views
What does “EquationalLogic`FindCounterexample[]” do?
I found the undocumented EquationalLogic`FindCounterexample[] by browsing the lists of available symbols, but I have no clue about its purpose.
The name is ...
3
votes
5answers
221 views
How to extract strings from the list with an additional condition on previous elements?
There are a long list of strings $s$ and two lists of substrings $s1$ and $s2$. I want to take all elements of $s$ which contain a substring from $s2$ and such that before it on no more than $n$ ...
