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Michal Kvasnicka


45 total contributions since 2015

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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...

1 month ago | 0 answers | 0

0

answers

Answered
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...

2 months ago | 0

Submitted


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

3 months ago | 1 download |

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...

3 months ago | 0 answers | 0

0

answers

Answered
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))...

3 months ago | 0

| accepted

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 ...

3 months ago | 3 answers | 0

3

answers

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...

5 months ago | 1 answer | 0

1

answer

Answered
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 = ...

9 months 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...

9 months ago | 0

| accepted

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...

9 months 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...

9 months ago | 2

| accepted

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

9 months 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: ...

9 months ago | 2 answers | 0

2

answers

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)...

10 months 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((...

10 months ago | 1 answer | 0

1

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...

10 months ago | 1 answer | 0

1

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...

10 months ago | 0 answers | 0

0

answers

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...

10 months ago | 4 answers | 0

4

answers

Question


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

1 year ago | 1 answer | 0

1

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...

1 year ago | 1 answer | 0

1

answer

Answered
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...

1 year 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"?

1 year ago | 1 answer | 0

1

answer

Answered
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.

1 year ago | 0

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

1 year ago | 0

Answered
is MATLAB support AMD RADEON?
MATLAB use for GPU computing CUDA technology, which is supported only by NVIDIA cards.

1 year ago | 2

Question


additional findchangepts function output
I have two questions regarding function "findchangepts" (DSP Toolbox): 1. How to effectively create additional output vector ...

1 year ago | 3 answers | 1

3

answers

Solved


Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

3 years ago

Solved


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

3 years ago

Solved


Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

3 years ago

Solved


Is my wife right?
Regardless of input, output the string 'yes'.

3 years ago

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