Community Profile # Michal Kvasnicka

51 total contributions since 2015

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Question

specific assignments of vector items
I am looking for suitable algorithm to solve the following problem: For vector v (Nx1, double, single) I need to find assigment...

2 months ago | 0 answers | 0

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Answered
elimination of conscutive regions (generalization: ones with zeros between)
I am still looking for better (faster) solution. Any idea how to improve so far best solution: A = [1 -1 0; ...

8 months ago | 1

Question

elimination of conscutive regions (generalization: ones with zeros between)
I need effectively eliminate (by zeroing) the consecutive "1's" between "-1's" and start/end of column at each column of matrix ...

8 months ago | 3 answers | 0

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Answered
elimination of consecutive regions
good idea (only 1D) is <https://www.mathworks.com/matlabcentral/answers/293926-how-do-i-find-4-or-more-consecutive-zeros-and-rep...

8 months ago | 0

Question

elimination of consecutive regions
I need to effectively eliminate consecutive regions in vector "a" or better in rows/columns of matrix "A" with length of separat...

8 months ago | 3 answers | 0

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Question

how to robustly estimate low and up envelope of signal with trend, few level constant steps and noise
I am looking for robust estimation method of low and up envelope of the signal consisting from smooth trend component, constant ...

8 months ago | 0 answers | 0

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Question

different speed of ODE benchmark with and without MATLAB gui
When I ran matlab benchmark on Linux at MATLAB GUI and at MATLAB command line (without gui) I get the different speed of ODE ben...

10 months ago | 0 answers | 0

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Incompatible gcc version with mex
Frankly speaking I do not understand why TMW choose the "compatible" compiler version on Linux so terribly. On many distribution...

11 months ago | 0

Submitted

Fast unique random permutations
Fast random sample (without replacement) from unique permutations of an integer vector

12 months ago | 2 downloads |

Question

add limit lines to the gplotmatrix figure
How to add to each subplot of gplotmatrix figure (gplotmatrix(x,[],group)) four separate lines corresponding to the two limits v...

1 year ago | 0 answers | 0

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find indices of row subsets
So far best solution: function ind = item2ind_new(item,t) t = t(:); [m,n] = size(item); mct = max(accumarray(t,1))...

1 year ago | 0

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Question

find indices of row subsets
I am trying to find vectorized matlab function ind = item2ind(item,t) to solve following problem: I have a list of row vectors ...

1 year ago | 3 answers | 0

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Question

speedup dsearchn for large data set
I am looking for significant speed up of dsearchn function in a case of large input data k = dsearchn(X,XI) where is no...

1 year ago | 1 answer | 0

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answer

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How can i find the equation of a fitted curve line in the curve fitting tool?
Your problem is already solved. When you are able to plot regression line you must know parameters k and q of line equation y = ...

1 year ago | 0

Answered
integer strings decoding ... speed optimization
Probably fastest and simplest solution, I found so far ... using latest new Matlab (>= R2016b) features, see function insertBefo...

1 year ago | 0

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Answered
How to find water vapour density for gaspl
Just try simple googling with the following keywords: water, wapour, density, table I hope you smart enough to find something...

1 year ago | 0

Answered
Error in implemented function
The double precision (default numerical values class in Matlab) is not enough for this kind of computation!!! You need to use s...

1 year ago | 2

| accepted

Answered
Function calculates wrong value
See ma answer here: <https://www.mathworks.com/matlabcentral/answers/366977-error-in-implemented-function link>

1 year ago | 0

| accepted

Question

integer strings decoding ... speed optimization
I have the following problem: I need decode integer sequences "c" to char string messages "m" by following association: ...

1 year ago | 2 answers | 0

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Answered
how to create symbolic function?
function Z=symZ(N,Thetas,Ndigit) Thetas = sym(Thetas); Zsym = prod((1 - exp(-(N:-1:2).*Thetas))./(1 - exp(-Thetas)),2)...

1 year ago | 0

| accepted

Question

how to create symbolic function?
I need to transform the following function to the symbolic form to evaluate it with arbitrary precision. Z(N,Thetas) = prod((...

1 year ago | 1 answer | 0

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answer

Question

Permutations Inversions Counting ... speed up
Hi, this is my code for permutation inversions counting. Any idea how to optimize it to get some additional speedup for large se...

1 year ago | 1 answer | 0

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answer

Question

Again terrible problem with profiler
I am again facing to terrible profiler problem (under Matlab R2017b). I have two codes doing exactly identical computing (counti...

1 year ago | 0 answers | 0

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Question

Permutations Cycles Counting ... speed up
Hi, this is my code for permutation cycles counting. Any idea how to vectorize it to get some additional speedup for large set o...

1 year ago | 4 answers | 0

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Question

problem with symbolic expression
A have some troubles with conversion of character vector to symbolic expression under R2017a: % character vector e = '(...

2 years ago | 1 answer | 0

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answer

Question

mupad command calling from matlab produce wrong results
I need to evaluate mupad command "discont" from MATLAB. In Mupad notebook the result is correct and looks like: <</matlabcen...

2 years ago | 1 answer | 0

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GPU Computing MacBook Pro (Retina 15'' mid 2014) force computer to use attached Intel iris GPU, give MATLAB access to entire 2GB Nvidia 750M
Your computer has only one Cuda GPU device, not two. Intel graphics is not Cuda enabled device. So, you cannot access to Intel g...

2 years ago | 0

Question

DSP questeion (filter design from estimated transfer function)
Is there any way how to design filter (a,b coeffs) from transfer function estimated by "tfestimate"?

2 years ago | 1 answer | 0

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About plotting Pareto fontier
Pareto front is always represented by convex hypersurface. So, you can use every methods how to visualize surface in 3-D case.

2 years ago | 0

Answered
Matlab function to compare 2 numbers
Just use function MinValue = min(a,b) That is all what you need.

2 years ago | 0

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