# All Questions

0answers
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### Annoying window. How to remove it?

Bug introduced in 10.0 and persisting through 10.1.0 or later How do I remove this window from my Mathematica? Unchecking the Debugger menu item as described in How to close the (local) Debug ...
1answer
305 views

### To solve Cylinderical PDE

I want to solve this PDE. I have tried to solve it with NDSolve but found error 'Boundary values may only be specified for one independent variable. Initial ...
2answers
304 views

I have a point in an image which I can locate by right clicking and using my mouse. Call this point $p = (100,100)$. I'd like to use ImageTake to grab an image, centered on this spot $p$ with $k = ... 1answer 271 views ### Output precision I've solved some equations using FindRoot and then computed some values. Now when I print the output, I only get a certain precision {{0.01, 496.983, 61.3147, ... 3answers 2k views ### Mathematica slope fields I would like to make a slope field. Here is the code ... 2answers 118 views ### recurrence equation, result members don't contain the number 5 [closed] print the first 5 members of the array a[n+1]=3*a[n]+7 which don't contain the number 5. a1=6. so a[2]=3*6+7=25, but 25 has the number 5 so we go to a[3]. a[3]=25*3+7=82 <--- this is OK... and ... 2answers 738 views ### Classification of a linear system of equations with a parameter I need to get every possible value of k that returns infinite number of solutions or no solution to this system: ... 1answer 354 views ### Reverse after ImageData? [duplicate] Why should we do a Reverse on the image data after an ImageTake ? For example: ... 2answers 381 views ### Difference In Eigenvectors When running my program in both Mathematica and MathCad, I end up with the same eigenvalues, but different eigenvectors. The ones in MathCad are normalized, which the documentation for Mathematica ... 1answer 454 views ### What is the correct way to use NIntegrate inside the FindMinimum function? I'm having minor issues with the FindMinimum function when using NIntegrate inside. The functions work perfectly well but I get ... 1answer 159 views ### Slow Dynamic Button Does Not Print [duplicate] Possible Duplicate: Why do buttons with ChoiceDialog freeze the front end? Why is SystemDialogInput failing to return a save file path? Evaluation inside Button stops after some seconds I ... 2answers 38k views ### Help find a bright object on Mars! In today's news, scientists found a bright object on one of Curiosity's photos (it's near the bottom of the picture below). It's a bit tricky to find - I actually spent quite some time staring at the ... 1answer 1k views ### DumpsterDoofus's captivating generative art How can I render these beautiful images that DumpsterDoofus posted? 4answers 3k views ### How to visualize 3D fit I have a data set of x,y,z values and I fit a function of x,y to the data. This works, but I can't come up with a nice way to ... 9answers 8k views ### Generating a Sierpinski carpet I am trying to draw a Sierpinski_carpet. I have code that works, but I think there is a more elegant way to do than my way. Maybe I couls use Tuples or ... 1answer 1k views ### Finding areas of beings in microscopic image I've got lots of images of diatoms. I need to get a list of their equivalent radii. It's not crucial to get them all, as long as those missed don't mess with the radius distribution (as would ... 3answers 536 views ### What bug fixes can be implemented in init.m? In comments on this question, Mr. Wizard suggested a community wiki to share the bug fixes/workarounds (or possibly other tricks) people load in their init.m. I ... 3answers 1k views ### Getting serious about Mathematica programming I'm at a point in my Mathematica journey where I need to be a little bit more strategic about my coding. Presently, I have a bunch of notebook files organized using the filesystem of the OS and ... 2answers 2k views ### Image segmentation and object separation in 3D using Mathematica I currently work on an image segmentation scenario to detect cell nuclei in 3D using Mathematica. The data I have are image stacks in the TIFF file format. I would like to keep the sequence of image ... 5answers 5k views ### How can this image (optical illusion) be created with Mathematica? I came across this image the other day: and liked the sensation of it pulsing. I was wondering if anyone would know how to create something similar with Mathematica (without the Pink Floyd Dark ... 3answers 2k views ### Changing color of an object in an image Consider the following image: How can I change all red colors in this image into (for example) blue. 4answers 2k views ### Remove image background of headshot in Mathematica? For example, using ExampleData[{"TestImage", "Girl2"}]: what's a general way to make the background transparent? I've tried various combinations of ... 2answers 8k views ### 3D heatmap density plot I have a set of data that looks like {{x1, y1, z1}, {x2, y2, z2}, ...} so it describes points in 3D space. I want to make a heatmap out of this data. So that points ... 5answers 2k views ### Factorisation diagrams Here is a way to visualize the factorisation of natural numbers. How do we get this or a similar kind of output using Mathematica? See the list of images generated for number from 1 to 36: 3answers 1k views ### Implementing hexagon binning in mathematica Hexagon bin plots are a useful way of visualising large datasets of bivariate data. Here are a few examples: With bin frequency indicated by grey level... ..and by glyph size There are packages ... 2answers 3k views ### Joining and interpolating data points I wonder what is the best practice for interpolating curves? Usually I'm using BSplineCurve and adjusting SplineWeights so it ... 6answers 4k views ### How to plot Venn diagrams with Mathematica? How does one plot Venn diagrams with Mathematica? I've searched quite a bit and I've found one source at MathWorld which provides the source code for doing them. But I don't understand this code, can ... 5answers 1k views ### Voronoi diagrams for generators other than points Any suggestions how to determine Voronoi diagram for sites other than points, as e.g. in the picture below? Input is a raster image. 2answers 2k views ### How do you deal with very large datasets in Mathematica? This question is in two related parts. The first is about dataset size, the second data wrangling. Part 1: I've built a naive Bayesian classifier on Mathematica. It uses ... 8answers 9k views ### How can I improve Mathematica's resolution on a macbook retina display? Mathematica 9.0 looks a bit fuzzy on the retina screen, how can I increase the resolution? Here another screenshot showing a direct comparison between the browser and Mathematica 1answer 1k views ### Constructing election cartograms? I found this pretty neat page showing cartograms for the US elections and I don't really know how to get started doing these graphics in Mathematica. For those who don't know, a cartogram is a map in ... 2answers 1k views ### Is Mathematica comparable to C++ for creating standalone applications? At my university, I have a yearly essay. I'm allowed to use any technology for implementing it. I've been coding it in C++ with Qt. I thought of about Wolfram Mathematica because I have some ... 1answer 1k views ### How to compare power towers in Mathematica? First I tried it directly, but it overflowed: ... 2answers 730 views ### Parallelize evaluation of function with memoization I have a complicated function that I need multiple times, so I want to memoize it and have the first evaluation done in parallel. Unlike in my example below it's not a continuous function, so ... 2answers 1k views ### How can I pack circles of different sizes into a spiral? Given a list of circles of different areas, I need to arrange them tangentially in order of increasing area and spiraling outward. An example of the type of packing I'm attempting is shown by the ... 8answers 1k views ### How do I get my equation to have the form$(x-a)^2 + (y-b)^2 + (z-c)^2-d = 0\$?

I want Mathematica to express the equation $$-11 - 2 x + x^2 - 4 y + y^2 - 6 z + z^2=0$$ in the form $$(x - 1)^2 + (y - 2)^2 + (z - 3)^2 - 25=0$$ How do I tell Mathematica to do that?
2answers
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### How can I detect a rectangular region of interest in a picture?

Here is a downsampled input image I converted to greyscale. To select the rectangular region of interest we first preform preprocessing: ...
5answers
2k views

### Can the banner in the Home Edition be removed?

The Mathematica Home Edition shows a banner at the top of every notebook: Is there a way to (permanently) get rid of it, without violating the EULA? Edit Yesterday, I sent this message to WRI ...
2answers
498 views

### How to implement FittedModel like objects

In the course of making some RLink wrappers I want to have some richer containers like Mathematica does with its FittedModel ...
5answers
9k views

### Custom arrow shaft

Inspired by Sjoerd C. de Vries' nice answer to this question, and the desire to pimp a Graph I did with Mathematica recently I would like to know if there are ways to customize the arrow's shaft ...
6answers
13k views

### How to find the position of elements in a list satisfying criteria

Say I have a list x={2,4,6,8,10} and I want to find out the positions of the elements that are greater than 7. ...
1answer
528 views

### How to write documentation in Wolfram Style?

Rather than craft my own stylesheets for documentation, I'd like to emulate (copy? ape? borrow?) the Wolfram style. Here is a very small example (type this in the help-box, which you get by pressing ...
3answers
1k views

### How to detect crosses and circles in 60x60 raster images?

I have hand-written 60 pixel times 60 pixel squares. I need to detect whether they are empty, x or circle. TextRecognize function fails. Is there some other function to process this kind of raster ...
1answer
455 views

### What are SparseArray Properties? How and when should they be used?

A strange undocumented form of SparseArray is increasingly used in answers on this site: ...
2answers
965 views

### Generating schedules/timetables in Mathematica

I've always used MS Excel to create my school schedules, and I've always been happy with the results. Is there a similar GUI way to generate schedules/timetables in Mathematica or a third-party ...
3answers
973 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 ...
1answer
1k views

### Is it possible to customize the Suggestions Bar?

I'd like to be able to customize the Suggestions Bar in v9.0 to provide recommendations of my own. Possible example: when doing unit calculations, I'd like it to suggest converting the answer to ...
1answer
2k views

### How to construct a treemap using non-rectangles?

I've written the standard version of a tree map (a graphic that shows nested data) and I'm looking to improve on this layout by switching to different types of polygons or perhaps circles. Can anyone ...
2answers
2k views

### Animating a Voronoi Diagram

edit: Excellent answers have been provided and I made an animation which is suitable for my use, however, all the examples rely on bitmap/rasterized data; is there a vector based approach? I would ...
1answer
2k views

### Finding the likeliest path in a Markov process

With Mathematica 9, we have the addition of various processes, among which the discrete Markov process. Given a transition probability matrix m, such a process is ...

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