# All Questions

82 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 ...
783 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 ...
2k 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 ...
289 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 ...
222 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 ...
510 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 ...
909 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 ...
7k 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 ...
509 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 ...
163 views

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 ...
392 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.
1k views

I have a large Excel .xls file. Miniature version shown below: (formatting should appear as two columns...) ...
340 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 ...
684 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 ...
419 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 ...
908 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 ...
226 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 ...
949 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 ...
276 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 ...
694 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 ...
338 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 ...
169 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 ...
2k 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 ...
822 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 ...
948 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 ...
465 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: ...
2k 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 ...
522 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 ...
658 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 ...
112 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 ...
121 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: ...
324 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 ...
504 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 ...
463 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 ...
456 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, ...
335 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 ...
319 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 ...
3k 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 ...
967 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 $\dot{x}=f(x), \quad \dot{y}=g(x,y)$ ...
254 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 ...
282 views

### What does “EquationalLogicFindCounterexample[]” 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 ...
278 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 $n$ ...
427 views

### Simple countdown timer in Mathematica

I dug around a bit and did not find a simple and clear implementation of countdown stopwatch in Mathematica. I am looking for a function that takes as an input a certain integer and then counts down ...
204 views

### How can Time be made to go backwards?

I would like to make a countdown timer, but cannot find a reliable method to make the DateList[] function reverse. The not so robust code for the Digital Clock with the display of seconds follows: ...
177 views

### Programmatically opening a palette from the Palettes menu

How can I programmatically open a palette from the Palettes menu? Is there a Front End token for this? Motivation: Certain settings for the palettes that are installed into standard locations and ...
2k views

### Using Export[] sends the file where?

I am trying to use the Export command to convert a list of plots into a *.gif file, and the command runs and executes well, but I can't find the file! Where is it ...
444 views

### How do I display imported images at actual size?

I know that this is an extremely basic question, but I am having a lot of trouble finding the answer in the documentation. When I import an image (for example, ...
82 views

### How safe are ReadProtected and Locked symbols? [duplicate]

Possible Duplicate: How to distribute proprietary Mathematica code I suspect that there is a way to expose the down values of such symbols with an attack along these lines: ...