# All Questions

3 views

### read and process hundreds of files txt

This short code is the one that broke my head for a while, are 11 variables that must meet a very specific condition, their difference must be 1. either can take the 11 values, hence all permutations, ...
10 views

### why Accumulate performs siginificantly different for two data sets with the same structure and length

I used Accumulate to calculate partial sum for two lists of vectors. These two lists have the same dimension (same number of vectors, and each vector has three ...
5 views

### Make a time IntervalSlider in Mathematica 10

Need to make a time intervalslier which start point is (10:00:00 Mar. 8 2015, 12:30:00 Mar. 8,2015) and varied from 00:00:00 Mar. 8 2015 to 252:30:00 Mar. 8,2015 for every 5 Minute. By using ...
28 views

### How to integrate Mathematica with other software

Mathematica is a fantastic platform for Mathematical analysis, physics, quantitative finance and most realms of scientific work. However, it doesn't serve well for general purpose programming, in ...
14 views

### How can i get the Style of a CellObject?

I want to work on a notebook programmatically with CellObjects. lets create a notebook for example: ...
14 views

### find initial condition for NDSolve

I have a complicate second order differential equation to solve numerically (too complicate to be posted). Unfortunately I do not know the behavior of the solution $\theta(r)$ near $r=0$ and I am not ...
26 views

### Is the letter “s” special in Mathematica? [duplicate]

I'm finding that the two versions of the expression below evaluate differently: ...
34 views

### Coordinates of MeshPoints

The output of a set of differential equations solved with NDSolve produces a series of curves and I need to obtain the spacing between these curves at a given level ...
28 views

### What is the exhaustive list of categories and properties that ImageIdentify can output?

I'm looking for a complete list of ImageIdentify's outputs. I'm seeing entities like the one below, so I'm wondering what all possible classes are if they have ...
456 views

I need to get the DateValues of the last 30 days (starting from yesterday, not today!) excluding saturdays and sundays. I want that the dates are german time (GMT ...
18 views

### Dialog-type notebook

I have the following dialog to calculate the product of a and b: ...
80 views

### How can I get from a list of characters representing a permutation to graphics showing the cycles?

I am trying to graphically represent cycles in various permutations of the alphabet, and have a question in two parts. I have ...
38 views

### Plot a parametric equation in cylindrical coordinates

I'm looking for a way to plot this parametric equation on cylindrical coordinates. r = e^t theta = t+1 z = e^2t Any help would be appreciated
33 views

### How can I increase plotting resolution with RegionPlot3D?

I am trying to plot a region with RegionPlot3D, but I have some problems. Here's the code I use: ...
15 views

### same variable name is persevered as different variables in to different places in single code

So I am writing a simple strait forward code and it seems as if Mathematica is perceiving the same variable as to different ones. The code is this: ...
69 views

### Poisson PDE in a rectangular domain

I found a solution for this problem, but this is in Scilab and I never use Scilab. Can anyone can help me to translate it in Mathematica? Here is the Link:http://imechanica.org/files/TorqueR.pdf I ...
138 views

### How to check if two nested lists have the same structure?

How can I check if nested lists like these have the same structure: ...
25 views

### Function for importing and plotting data from excel spreadsheet

I know this must be a very basic question, but I could not find any answers. I need to create a function that: 1) imports data from an Excel Spreadsheet, 2) assign specific information from this xlsx ...
31 views

### Multivariate Exponential Distribution in Mathematica

Is there a way to define a multivariate exponential distribution based on independent univariate exponential distributions (Akin to multinormal distribution): ...
28 views

### How can I translate ExpIntegralEi (Mathematica function) in Matlab? [on hold]

after integration process Mathematica provided results that include the ExpIntegralEi[z] function. How can I translate this function in Matlab for $z>0$? Or ...
26 views

### numerical integration with parameter

Now I'm trying to integrate a function numerically. But it shows always an error message. x=y is not a valid limit of integration I know that this function ...
32 views

### Plot a partition of the sphere given vertices of polygons

I saw in this question that Mathematica can draw spherical triangles. I guess something similar can be done to plot a spherical polygon. I am interested in something similar: I have a set of ...
41 views

### SameTest issue?

Folks, I am trying to construct and algorithm which finds all of the remaining groupings (of three items, in this case) from a list of items for which no two items are in groups that have previously ...
97 views

### How to make a time slider like Manipulate[n,{n,1,20,1}]?

I want to make a time slider varied from 12:00:00 Jan 1,2015 to 22:30:00 Jan 1,2015 for every 5 minute. So like using Manipulate[n,{n,1,20,1}], ...
32 views

64 views

### interactively replace pixel value

I am trying to develop an "Eraser" tool for imagery as is available in other image editing programs so I can interactively clean up minor defects in imagery by simply mousing over them to set them to ...
23 views

### How to add pattern or write numbers on a cylinder? [duplicate]

I want to draw several cylinders in Mathematica. In order to distinguish them in a grey-style print, I should write a visible number on or add a different pattern (dotted, lines, stripes, etc.) to ...