# All Questions

587 views

### How to impose custom style to the edges of a graph

We construct a graph as the following. ...
1k views

I have been working on picking expressions apart using Head and Part and encountered a little mystery. Consider the canonical ...
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### Effective matrix power like algorithm

First example Suppose you want to calculate the 6th power of some matrix $A$. The brute force attempt of doing this is considering $$(((AA)A)A)A)A$$ which requires a total of 5 matrix ...
893 views

### Lexicographic ordering of strings in Mathematica

I recently realized that Mathematica seems incapable of comparing strings in the "normal" expected lexicographic order. Indeed, for some simulations, I need to process text directly, without fiddling ...
1k views

### Function to calculate and plot sample variogram

I'm trying to create a function that calculates and plots the sample variogram for a time series. It should take two arguments: data, a time series, essentially a list of reals; k, an integer greater ...
367 views

### Locators and Table within a Manipulate are not behaving

I am putting together a Manipulate on vector addition for my intro physics class and everything works well except when I include a Graphics that has a Table within. The code is below. There are three ...
796 views

### Selective blurring of areas of image to make seamless tiles

I'm trying to make seamless tiles - images that can be repeated on a grid without it being obvious where the joins are. So far, I've followed the classic strategy of getting the edges working ...
834 views

### How to solve for an Z-Score of a T-Distribution?

I'm looking for the Z-Score for a distribution, where the integrated area sums up to 0.90. Unfortunately I always get an error from Mathematica, ...
3k views

### Delete duplicate elements from a list

If a list contains duplicate elements, for example list = {a, 1, 5, 3, 5, x^2, x^2}, how can the duplicate elements be removed? The result would be ...
442 views

### Problem when defining variable in Mathematica

I'm trying to run this: domain := {n, 0, 10}; Plot[n, domain] but it doesn't work. Instead, it generates the message ...
5k views

### Showing the correlation of two variables using a plot

I have a list of $\{x_i,y_i\}$ pairs and I want to show that $x_i$'s and $y_i$'s have positive correlation. The result of ...
671 views

### Adding controls for multiple functions in Manipulate

I am learning Mathematica and the Image Processing functions. I have the following Manipulate procedure which works fine: ...
8k views

### How to specify assumptions before evaluation?

If I request mathematica evaluate an integral for me, I'll often get a more general ConditionalExpression than I want. Example : ...
1k views

### Implicit Interpolating function in Mathematica and its explicit form in small sections

I have a set of points $\{x_i,y_i\}$ that represents a closed curve. I want to find a function $F(x,y)$ such that $F(x,y) = 0$ gives the needed curve and $F(x,y) \ne 0$ outside the curve. For ...
734 views

### Using GRTensorM 1.2 in Mathematica 8.0

I am copying a post from 2009 that didn't get any reply on the Wolfram page, as I am experiencing a similar problem to this at the moment: I was wondering if anyone here knows of a way to force 8.0 ...
998 views

### Nesting Parallel processes

I just attempted to run code that had nested ParallelMap[] functions. It generates the error message: ParallelMap::subpar: Parallel computations cannot be nested; proceeding with sequential ...
2k views

### Poor rendering of fractals

Could someone explain why I get those ugly graphics .. ..trying to use fractals in mathematica 8 ? I'd also like to know if it is possible to draw 2D fractals in Mathematica My configuration ...
2k views

### List all the directories under the current one

I feel like I am forgetting something obvious, and will remember or be ashamed as soon as an answer turns up. However, I cannot for the life of me get all of the directories in the current working ...
441 views

### Data of badly formatted file

Similar as in this question, I have to read in data from a file (exampleFile.txt) which is not so well formatted. Unfortunately, I cannot find a solution by myself. Since it is a bit complicated to ...
2k views

### Mathematica2tikz an equivalent function

Matlab2tikz is script which generates native Latex/Tikz figures from MATLAB. I am looking for an equivalent method/function in Mathematica to generate similar results. Obviously the final script may ...
2k views

### Max of a table/list with indeterminate values

Suppose I have a Table: tab = {1., 2., 3., Indeterminate} When I type Max[tab] I get ...
2k views

### Finding all elements within a certain range in a sorted list

Suppose we have a sorted list of values. Let's use list = Sort@RandomReal[1, 1000000]; for this example. I need a fast function ...
2k views

### How to manipulate web pages on Mathematica?

I wanted to input some data on this page through Mathematica. Then I would press the "buscar" button also through Mathematica coding and get the results on Mathematica. The most similar post I've ...
3k views

368 views

### Brackets in output make unable to use output to identify matrix element

I'm trying to write a code where each matrix element swaps with a randomly selected neighbor (cardinal directions only) to redistribute the matrix. So far I've been able to replace an element with its ...
3k views

### Creating overlapping histogram plots

I am plotting two histograms on the same graph: g1 = Histogram[bc, ChartStyle -> {Red}] g2 = Histogram[bcx] Show[g1, g2, PlotRange -> {{0.1, 0.6}, All}] ...
217 views

### overriding the format of 'copy-as' latex?

In the answer to Bold face formatting for vectors instead of overarrows like latex \mathbf{}? was a nice method of specifying the visual display for a variable, so that I can do something like the ...
290 views

### AbsoluteTiming affected by surrounding code

In the process of simplifying code posted for another question, I noticed AbsoluteTiming returned different results for the same code being timed, ...
982 views

### Numerics with Mathematica

From time to time, I would like to use Mathematica purely numerically, e.g., plotting a function which is defined as an integral which cannot be solve analytically or a solution of a differential ...
6k 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 ...