# All Questions

299 views

### High memory use while exporting a BMP

Something mysterious is going on when exporting images. I'm using Mathematica 9.0.1 on Windows 7 (64 bit), and find that the memory use is excessive when exporting to a bmp. But it doesn't happen ...
820 views

### Using a different R version with RLink

I wish to use a different version of R than what is provided by Mathematica 9. For example, I want to use the Macports version of R, where R_HOME is ...
923 views

### Higher order SVD

Does anyone know how to do a higher order SVD in Mathematica ? A good reference seems to be here http://www.sandia.gov/~tgkolda/pubs/pubfiles/SAND2007-6702.pdf but I don't understand their formalism ...
468 views

### How to recompute the layout of a Graph?

I asked a question about changing Graph properties in a similar way to how Show can change ...
398 views

### How to separate paths from the output of EdgeDetect?

I have been trying to find a way to separate the various closed paths that can be output by EdgeDetect. For example, taking the output of: ...
178 views

### Manipulate not working inside DialogInput

Some controls do not appear to work with Manipulate inside a DialogInput. For example: ...
480 views

### Does anyone have experience with performing symbolic regression using Mathematica?

I understand that there is at least one Mathematica package, DataModeler commercially available for symbolic regression. I'm seeking any observations with this or any other similar tool. I'm ...
493 views

### WaveletScalogram in polar coordinates

For given dataset data = Re[Zeta[1/2 + I Range[0, 100, 0.01]]]; It is nice that Mathematica can plot data in both Cartesian and Polar coordinates. ...
430 views

### Putting ticks with values on a parametric plot

I need to plot ticks with values on the following ParametricPlot[] The ellipse can be obtained by ...
252 views

### Why is my rasterized graphic blank?

Bug introduced in 7.0 or earlier, and persisting through 10.0.2 or later (OSX 10.10.2) Consider the following code: ...
708 views

### Simplify assumes Boolean 1 and 0 in logical expressions

Per this chat discussion and this previous question where I encountered the strange behaviour: ...
774 views

### Second level depth pure function?

I have the following working construction: Select[ln125, # == Nearest[ln125, 551.748][[1]] &] Here, ln125 is a one ...
732 views

### How to improve this code for solving the “Mr.S and Mr.P” puzzle?

Mr.S and Mr. P puzzle — "Formalization of two Puzzles Involving Knowledge", McCarthy, John (1987) We pick two numbers $a$ and $b$, such that $a\geq b$ and both numbers are within the range ...
2k views

### Reshape vectors exactly like in MATLAB

This gives a 64×1 column vector in Mathematica: ...
424 views

### Saving a notebook as a $\LaTeX$ file, with syntax highlighting preserved

How can I save a notebook as a $\LaTeX$ file, while preserving the syntax highlighting (such as input/output boxes)?
1k views

### Adapt ticks in plot and font in legend

Some of my 2-dimensional data are displayed with a code similar to this: ...
342 views

### Arranging connector lines

Heike gave an absolutely wonderful answer to my question about arranging subplots around a main plot and including connector lines. This is the result: Starting from Heike's answer, what is the ...
99 views

### Reading from a socket stream

I noticed an undocumented socket package (SocketLink) in Mathematica (Using version 10, not sure when it was actually added) and wrote a barebones HTTP responder ...
390 views

### Map of United States as a 3D histogram

By combining the state data from here and the extrusion code from here I have managed to make prisms of the various US states such as However, the extrusion method looses information about the ...
518 views

### Are there tools for getting Mathematica 9 Notebooks working in Mathematica 10?

As often happens with Mathematica updates, nearly all of my notebooks no longer work as they did with the previous version. The upgrade from 9 to 10 has changed the appearance or introduced errors ...
528 views

### How to pick increasing numbers from the list

How to pick increasing numbers from the list. lst = {5, 3, 6, 2, 7, 4, 8}; out: {5,6,7,8} So many interesting ...
508 views

### “Reset” Button for Manipulate

I want to distribute a .cdf to my students wherein they manipulate 5 locators on a graph to define various shapes. The .cdf opens with the locators in a "nice" position, but of course it is very hard ...
309 views

### Clever use of DownValues, or failure to understand the “Mathematica Way.”

I needed to look at the changes in the values of about 4000 items from one year to the next. I have a table with identifiers and values for each year. Not all of the items are in each list. The ...
1k views

### Write C/C++ programs calling Mathematica functions

I need to write a C/C++ program and call some functions in Mathematica especially those like Solve or NDSolve. The problem is ...
380 views

### How do I seamlessly migrate from the older Units package to Mathematica 9's Quantity objects?

I have several notebooks that make use of the Units package and would like to be able to work simultaneously with the older units and ...
535 views

### Dynamic graphics are less responsive inside a Manipulate

I have some code which displays a GraphPlot and allows the user to click on any vertex in the graph to display some information about that vertex in a popup window. ...
886 views

### Load a Mathematica Package via .Net code

I'm using C# to pass data to Mathematica and return graphs: ...
1k views

### Import[ ] drops leading zeros from data when importing a CSV file

I need to load data from the CSV file shown below. Import[ ] drops the leading zeros in column 3 when it imports the CSV file, but they are security identifiers, and I need them. ReadList[ ] ...
991 views

### How could I add arrows to the axis of a figure?

It is easy for me to add arrows to the axes of the a figure by taking advantage of AxesStyle -> Arrowheads[] when the differences between the horizontal and ...
530 views

### Assessing argument type in set delayed function definitions

I'm wondering how to properly assess the type of arguments passed to functions defined with :=. I want my functions to be the most efficient, unambiguous and clear ...
580 views

### What's the most “functional” way to do Cholesky decomposition?

I can do Cholesky in a procedural style, such as: ...
263 views

### Old values are not freed/garbage collected when you re-evaluate an assignment

For this code: (* Cell 1 *) generate := Module[{x}, x = Range[100 * 1000 * 1000]; x]; (* Cell 2 *) g = generate[]; MemoryInUse[] If I evaluate cell 2 ...
2k views

### Combination and Permutation

How could I obtain the list of all the groups of 5 numbers taken from Range[12] such that the 2 lists have an empty intersection : ...
88 views

### Unexpected pattern matching behaviour: PatternSequence vs. Optional

Consider the following pattern-matching expressions: ...
227 views

### Is there a way to control V10's undo length?

This may be a duplicate (if so I will remove this), but I was having trouble finding the relevant bit of documentation to fix it. I noticed that my FrontEnd memory ...
385 views

### Converting structured data to a dataset

A Dataset seems perfect to represent structured data. Has anyone already thought about how to convert as efficiently/elegantly as possible an XML or JSON file to a Dataset in Mathematica 10 ?
480 views

### How to visualize the interior of a complicated 3d plot

I have an external data file (can be downloaded here: link 1 or link 2) which contains a dense grid of initial condition in the (x,y,z) space. I read it with Mathematica and plot these initial ...
437 views

### How can I access the internal function that plots a molecule from a formatted XYZ file?

Mathematica has the ability to plot a molecule using the data contained in an XYZ file. This is a simple text file, of which this is an example. The molecule is plotted using the Import command. ...
680 views

### How can I Flatten this List with Inner List of Lists?

Given the following List ...
169 views

### Are formal characters like \[FormalA] to be used differently than other symbols?

I noticed that Mathematica has a set of special 'Formal' characters such as \[FormalA], \[FormalB] , etc.. In the front end, it ...
611 views

### How to send output of Information[] command to a text file?

I am having little hard time sending output of Information[] command to a text file. related question How to write output to an external text file in addition to ...
456 views

### How to use pattern matching to assign values to Subscript[f,x_]?

I want to define two subscripted functions Subscript[f,1] and Subscript[f,2]. To keep the assignments local, I would like to ...
251 views

### Strange results while nesting scope constructs?

I did a handful of tests with Block, With, and Module and had a couple of new surprises. ...
830 views

Is it possible to avoid this unreadable situation with label crowding when using PieChart's RadialCallout and ...
692 views

### Count consecutive positions with the same value

I want to program a function that counts the successive positions with the same value: In[]= ConsecutiveValues[{1, 1, 1, 1, 2, 2, 1, 0}] Out[]= {4, 2, 1, 1} In ...
251 views

### Encoding format used by GraphicsData?

I am trying to extract some graphics stored in PICT format from a Mathematica notebook, using a platform that doesn't support PICT. If I look at the .nb file in a ...
458 views

### Mathematica Source-Code Control for CDF files in multi-user scenario

Q: I'm putting together a strategy on how its best to maintain cdf documents with multiple users in a source code repository. Ideally I wish for users to create (unit tested) cdf's with data and ...
5k views

### subscripts in plot axis labels

Superscripts can be included in axis labels by the use of the caret symbol (e.g., Plot[x^2, {x, -1, 1}, AxesLabel -> {x, x^2}]). How does one include subscripts ...