Community Profile # Lukas Bystricky

Last seen: 5 Monate ago Active since 2015

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MXCREATEDOUBLEMATRIX memory overflow error
I have a mex file which calls MXCREATEDOUBLEMATRIX, for example PLHS(1) = MXCREATEDOUBLEMATRIX(100,1,0) At this line Matlab...

mehr als ein Jahr ago | 0 answers | 0

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Question

Compiling mex with gfortran
I'm trying to compile some Fortran files into a mex file. I'm using an existing makefile, and I'm having issues linking the corr...

mehr als ein Jahr ago | 0 answers | 0

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Question

Make transparent contourf plot
I'd like to overlay a contourf plot on top of a map of the world. To do this the contourf will need to be transparent. Following...

fast 6 Jahre ago | 2 answers | 1

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Another slightly irritating issue is that you can't call rank(A) on a sparse matrix. Yes I know you can use sprank instead, but ...

mehr als 6 Jahre ago | 0

Question

Assign separate handles to function outputs
I have a function that returns two outputs, the function value and its derivative. I'd like to create separate handles to the fu...

mehr als 6 Jahre ago | 1 answer | 0

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Counitng the number of scatter points above a surface
Can your surface be expressed as z = f(x,y)? If so for every scatter point (at position (x0,y0, z0)), you can do: h = z0 -...

mehr als 6 Jahre ago | 0

I haven't gone through all the answers so it's possible this has already been addressed, but there are a couple things that both...

mehr als 6 Jahre ago | 0

How to make sure each column in a matrix sums exactly to 1?
It's because you're calculating the column sums and then setting the diagonal entries to 0. If you calculate the sums after you ...

mehr als 6 Jahre ago | 0

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Given i have multiple csv files in a folder, how can i access it and read them?
Try something like this files = dir('*.csv'); num_files = length(files); results = cell(length(files), 1); for...

mehr als 6 Jahre ago | 0

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Matrix Multiplication column and vector
Try B*A where A is a row vector and B is a column vector (you may need to transpose them to get them in this form). T...

mehr als 6 Jahre ago | 0

Where can i get the mathematical form/formulaes for all the techniques used in image processing toolbox?
Matlab typically provides references for each function at the bottom of the documentation page. See for example the reference...

mehr als 6 Jahre ago | 0

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shifting plot of signal from right to left
Assuming you're plotting x vs. t, instead of plot(t,x) try plot(t - 8, x) (or something close to 8) to shift...

mehr als 6 Jahre ago | 3

Meaning of the symbol '' \ ''
That's actually a backward slash. J\F is equivalent to solving the system J dx = F for dx, where J is a matrix (probably a Jacob...

mehr als 6 Jahre ago | 1

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Question

I'm new to Simulink Coder and I'd like to find out the differences between the various system target files in the code generatio...

mehr als 6 Jahre ago | 0 answers | 0

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Question

How does Simulink/MATLAB decide on the precision of its output?
<</matlabcentral/answers/uploaded_files/33754/difference_32.jpg>> I'm in the process of doing a comparison between a simple S...

mehr als 6 Jahre ago | 1 answer | 0