# All Questions

430 views

### Combining and aligning “chart” type graphics with regular plots

Is there an easy (recommended) way to align regular plots (e.g. ListPlot or Plot) with chart type graphics (...
476 views

### How to create a multi-selectable setterbar with colored buttons

Background: consider the following code-snippet. ...
333 views

### Why can't D[] be used in place here? [duplicate]

Possible Duplicate: General::ivar is not a valid variable when plotting - what actually causes this and how to avoid it? Beginner question: Why can't I use ...
378 views

### Revert FullForm-ed text to prettyprinted

Sometimes strings in a notebook/package file end up garbled due to some unknown/unintentional conversion of the expression/cell/notebook. I could not find a way to revert such unreadable text to its ...
102 views

### Mathematica with MongoDB database

I try connect mathematica with my database NOSQL mongoDB but I have problem with create collection. I have Mathematica 10.2 and I download driver .net version 2.2 from this website a link! I unpacking ...
485 views

### Random sampling of multiple integers with constant sum

I want to build a model of 40 geological layers, assuming each layer has equal chance to be one of the four types of rocks and the four types of rocks have equal chance to appear in any layer. The ...
206 views

### Mathematica-exported PDFs placed in Illustrator documents keep disappearing

This question is regarding interoperability between Adobe Illustrator and Mathematica. Illustrator has a File → Place... function which can insert complete figures inside Illustrator documents. ...
150 views

### How to specify frame tick labels without modifying the Automatic tick marks? [duplicate]

I have the following: ...
363 views

### Removing gutter shadows from scanned pages

I am new to image processing, and I was hoping someone might set me in the right direction. I am trying to create a simple toolkit for personal use for digitizing scanned book images into a database. ...
261 views

### How can I stop Mathematica from re-arranging formulae in TraditionalForm?

Let's say I have a sample formula, for example (Abs[x]/(-(2 - \[Kappa]) - 5))/(Binomial[a, b]/4) or something like that. I can of course typeset it to a limited ...
325 views

### What is shorthand way of Reap list that may be empty because of zero Sow

Sometimes because of conditionals, you cannot guarantee that Sow will be called at least once. Reap[Sow[1]][[2,1]] results in ...
239 views

### Simplify 2D polyhedral Regions like Interval

I don't think there's a built in "RegionSimplify" for polyhedral Regions and derived akin to how Interval automatically simplifies its argument expression: ...
208 views

### Weird output of DistributionChart

I have a larger data set and want to display it using DistributionChart. ...
149 views

### Choppy curves with Manipulate [duplicate]

While manipulating the slider in Manipulate[], I experience choppy curves. These do however render correctly after letting go of the slider. The same phenomenon occurs when pressing the + or - button ...
153 views

### Return value of Reap when using tags

I've noticed a behaviour of Reap that I don't quite understand yet. Suppose I want to Sow several values during a computation. ...
153 views

### Fractions formatting in Column / Grid

Fractions are squished in GridBox: ...
271 views

### How to deal with too much recursion

I have put together a very simple climate model based around four equations which define the state at time t based on time t-1, ...
167 views

### How to simplify my expression to the style of “a+b*I”?

How to simplify my expression to the style of "a+b*I"? Expand[(E^(I θ) (-1 + E^(I n θ)))/(-1 + E^(I θ))] ...
351 views

### Sort a list of coordinates by frequency from first component of each coordinate

The situation is that I have a List like this: ...
370 views

### How to add a graphics frame to an image without resampling

Using Inset to place an image inside a Graphics expression with Frame -> True provides a ...
240 views

### How can I use Pick to select items in one list when a value in a corresponding list is $\leq$ some value?

Imagine I have two lists: List1 = {0, 1, 0.6, 0.5, 1.2, 0.4}; List2 = {"a", "b", "c", "d", "e", "f"}; How can I use Pick to ...
277 views

### Generate regularly spaced points from the surface of simplexes

I need to generate regularly spaced samples (points) from the surface of unit simplexes with 2 or greater vertices or end points. I can generate random samples pretty straightforwardly: ...
361 views

### String pattern search and replacement — it works, but produces error messages only the first time it is called

I defined a function in Mathematica to process a pre-generated string. More specifically, I'd like to process some parts of C codes generated from MMA. Basically what my function does is to expand the ...
408 views

### Why do I get empty graph when adding 'Abs' function?

Can someone be so nice to provide some help for this particular situation? I try to plot a graph of a derivative which contains modulus. Without it the graph is drawn correctly: But when I wrap the ...
414 views

### How can I find if the number of subsets for a list is very large?

I'm trying to find the following; Subsets[Range[2, 2300], {4}] but my computer gave the following error: ...
578 views

### How to show error messages in current notebook?

I would like Mathematica to print error messages in current notebook together with output. This is default option in Mathematica, but recently I turned it off somehow. Now, I am getting output in ...
436 views

### Variant of the cutting-stock problem in Mathematica

I'm pretty new to Mathematica and am trying to learn to solve problems in a functional way. The problem I was solving was to list the ways in which I could sum elements from a list (with repetitions), ...
354 views

### Is it possible to induce Mathematica to chop off parts of Graphics objects that exist outside of a Frame?

I am running Mathematica 7. In a Graphics environment I am setting Frame -> True (and using ...
287 views

The following doesn't appear to work: DynamicModule[{}, Button["Press Me", ChoiceDialog["OK or Cancel?"]]] When I press the button labelled "Press Me", a dialog ...
707 views

### Evaluate while external command is being run [duplicate]

Possible Duplicate: Computing Many Slow I/O Operations I'm launching an external command with the Mathematica front end that takes two arguments: ...
2k views

### How do I fill in a circle made by ParametricPlot with one solid color?

I have a very simple question but I am new with Mathematica. I made a circle on a parametric plot and I made the line black. I want to make the inside of the circle on the parametric plot red. So the ...
287 views

### Scope within Context

To define some package-wide functions/variables, what approach is recommended? I tried to use contexts with the Begin function, but this failed: ...
356 views

### ArrayPlot with cells labeled by corresponding values

I would like to have ArrayPlot[] also present the value of each cell in it, similar to the LabelingFunction that is available in ...
504 views

### Monochrome PNG (and GIF) Export

Is there a way to Export expressions to a monochrome PNG? I have tried the ColorQuantize function which is mentioned in ...
516 views

### Passing unquoted strings (poor man's enumeration)

I would like to be able to pass an unquoted string as a parameter to a Mathematica function [that I am writing] and have it show up without evaluation if the string happens to be defined. Thus I would ...
160 views

### How to let output and message be print to two separate external files?

How to let output and message be print to two separate external files? Also, I'd like the content print out to have similar look as when it's print inside the notebook, i.e. it should be in ...
1k views

### How to make a dynamic stopwatch?

For some experiments I need some basic timer function. I tried various methods, and neither of them are fully satisfactory. What I need is a button, that starts/stops a timer, resets timer with each ...
497 views

### What does MaxStepFraction do?

I find that with NDSolve[...] while solving a partial differential equation, changing the MaxStepFraction from ...
56 views

### How to define a complicated function inside the body of Compile?

I want to compile a function in a way to keep its memory footprint down. In the example below, I am trying to compile a function f that makes three calls to ...
145 views

### Choosing sets from Subset[list]

Say I have a set, S, and I take Subsets[S] (the power set of S). For example: S={a,b,c} Subsets[S]={{}, {a}, {b}, {c}, {a, b}, {a, c}, {b, c}, {a, b, c}} How can ...
80 views

### Same name for functions in package and Global context

I am using a package that was written for Mathematica 3 while I am now working on Mathematica 8. I have issues with 2 functions in particular, Order and GraphComplement. They are a part of this ...
93 views

### Naming conflicts with Dummy variables in several packages conflicts

I'm using several packages in a notebook. In each packages there is functions defined with dummy variables. When I load the several packages in my session, i've got a warning message: ...
236 views

### adjust the alignment of different legends

I used Show to combine a ListPlot and Plot, and each plot has its own legend. The code is as ...
130 views

### Is it possible to change the precision in Compile?

I'm using Compile to do some numerical calculation and I need high Precision. I was wondering if it is possible to change the ...
201 views

### ArrayPlot with variable width bars

I've been using a DateList plot to visualise property information but I don't think it's the best way display my data. My data is formatted as {time (hours), property} where property is an integer ...
241 views

### How to plot the result of this singular integral?

Please I open a new post here after this one : http://mathematica.stackexchange.com/a/59203/10158 Now I want to plot the function $f(a,b)$ as a function of $b$ for different values of $a$ : $a=0.5$ , ...
147 views

### How to make a case insensitive sorted list and rename the file names of a given folder?

Suppose I had about 500 .JPG and .jpg files in my folder "c:\images\". How to ask ...
570 views

### Apply color function to matrix plot

I want to apply the following color rules to a large table of numbers. I have extracted a part of the table to use as an example. I would like to assign 5 different colors to 5 different ranges of ...
522 views

### Exporting strings without the quotes

I'm trying to export the following string "sep = ," to a CSV-file, as to be able to define the separation symbol. However, when using the following command: ...
237 views

### Isn't it possible to Pack a SparseArray?

I have the following matrix Va: ...

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