Answered
combining many RGB images into one image
You can display a cell array of images using <http://www.mathworks.com/matlabcentral/fileexchange/22387-imdisp imdisp>. imdi...

6 years ago | 0

Answered
In mex files, where does output to stdout and stderr go?
In a C++ mex file you can output std::cout to the command line, by putting the following code somewhere in your mex file: c...

6 years ago | 2

Answered
scatter plot with 4 different background color
figure; im = rand(2, 2, 3); image([0 1], [0 1], im); hold on a = rand(10,1); b = rand(10,1); scatter(a, b); The...

6 years ago | 0

Answered
How to optimize this matlab code?
Use <http://www.mathworks.com/matlabcentral/fileexchange/8773 multiprod> as follows: y = reshape(multiprod(multiprod(W_matr...

6 years ago | 0

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Answered
How to determine the MATLAB version when compiling C/C++ mex files
matrix.h contains the following: #define MX_API_VER 0x07040000

6 years ago | 0

Question


How to determine the MATLAB version when compiling C/C++ mex files
MATLAB's C/C++ mex interface changes from time to time, with new releases of MATLAB. Functionality can be added, removed or chan...

6 years ago | 4 answers | 1

4

answers

Answered
Which MATLAB operations/functions need speeding up?
CROSS It is shameful how slow this basic function is. I wrote my own (still in standard MATLAB), and it was 5 times faster. B...

6 years ago | 2

Answered
What features and improvements do you hope to see in HG2?
Texture mapping of arbitrary meshes. See <http://www.mathworks.com/matlabcentral/answers/183980-how-can-i-texture-map-an-arbitra...

6 years ago | 0

Question


How can I texture map an arbitrary mesh
Surf() and surface() allow me to texture map a regular quadrangular mesh. How can I texture map an irregular triangular mesh, of...

6 years ago | 0 answers | 0

0

answers

Question


Fastest way to compute J' * J, where J is sparse
I have a sparse rectangular matrix, J, for which I want to compute: >> H = J' * J; It's a bit slow (transpose is taking ...

7 years ago | 2 answers | 1

2

answers

Answered
What features and improvements do you hope to see in HG2?
Some volume rendering capabilities, similar to <http://www.voreen.org/ voreen>.

7 years ago | 0

Answered
What features and improvements do you hope to see in HG2?
Support for all fonts, not a limited subset, in vector graphics export.

7 years ago | 1

Answered
What features and improvements do you hope to see in HG2?
Support for transparency and lighting in vector graphics export.

7 years ago | 0

Answered
What features and improvements do you hope to see in HG2?
MUCH faster rendering. For example, MATLAB renders a million points of different colors incredibly slowly. I reckon some well...

7 years ago | 1

Answered
What features and improvements do you hope to see in HG2?
Anti-aliased graphics.

7 years ago | 1

Answered
What features and improvements do you hope to see in HG2?
Set a colormap per axes instead of per figure. This would make it much simpler to use multiple colormaps in the same figure.

7 years ago | 2

Question


What features and improvements do you hope to see in HG2?
For a long time now, MATLABers have been calling for an improved graphics pipeline. MathWorks have made it clear in the past few...

7 years ago | 18 answers | 0

18

answers

Question


Equivalent of inputname() for output variables
Say I have a function: function B = myfun(A) disp(inputname(1)) disp(outputname(1)) B = A; If I call it from th...

7 years ago | 1 answer | 4

1

answer

Answered
Is it possible to set watchdogs (memory, exec time) in MATLAB?
I use timers to check certain things, then exit MATLAB if things go wrong. E.g. the following timer function: function kill...

7 years ago | 0

Answered
Determine if using HG2
I've ended up using the undocumented function, graphicsversion(): function tf = ishg2(fig) try tf = ~graphicsvers...

7 years ago | 0

| accepted

Answered
Determine if using HG2
Currently I'm using the version checking approach: function tf = ishg2() try tf = ~verLessThan('matlab', '8.4'); ...

7 years ago | 2

Question


Determine if using HG2
How can I determine if MATLAB or the current figure is using the new graphics pipeline, HG2? I need a function tf = ishg2(...

7 years ago | 6 answers | 4

6

answers

Answered
Forward CUDA printf output to the MATLAB console
There might be a way to redirect output from stdout in a mex file ( <http://www.mathworks.co.uk/matlabcentral/answers/132527-in-...

7 years ago | 0

| accepted

Question


In mex files, where does output to stdout and stderr go?
If I link an external library to a mex file, and this library sends text output to stdout or stderr, what does MATLAB do with th...

7 years ago | 3 answers | 3

3

answers

Question


Forward CUDA printf output to the MATLAB console
I am wrapping CUDA code in a mex file. I have printfs in my CUDA kernel, and I want to see the output from those printfs, ideall...

7 years ago | 1 answer | 0

1

answer

Question


Linking mex files to boost libraries
Boost libraries have awkward names. They depend on all sorts of things: compiler version, library type, boost version, etc. E.g....

7 years ago | 0 answers | 0

0

answers

Answered
how to get RGB color?
You can use the <http://www.mathworks.com/matlabcentral/fileexchange/16233 sc> toolbox, from the File Exchange. In your case, tr...

7 years ago | 0

Answered
Jacobian of scalar matrix
gradient() computes partial derivatives approximately, using finite differences. It can't compute the exact partial derivatives ...

7 years ago | 0

Answered
Possible to apply filter2 to only values above a limit?
Compute the filtered version for all pixels, and simply replace the pixels above a certain value with their filtered value: ...

7 years ago | 0

| accepted

Answered
Can classes be made unsaveable
No. When a class object is saved, the saveobj method for that class gets called, if it exists. If this method throws an error, i...

7 years ago | 0

| accepted

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