Question

ranking of vector with non-unique elements

I need to perform fast ranking of the vector with non-unique elements, like in the following example: F = [10.1 31.0 20.5 20.5 ...

ungefär 5 år ago | 1 answer | 0

Question

vector of integers modification

I have vector of positive integers which I need to modify into vector of consecutive integers with the same ordering. Example: ...

ungefär 5 år ago | 1 answer | 0

Question

vectorised code is terribly slower

Why is the vectorized version of simple local maxima detection code significantly slower (~2-3 times) than its for-loop version?...

ungefär 5 år ago | 0 answers | 0

Question

ischange in stream or moving window regime

I would like to compute change points (or linearlly segmented signal) from input data stream via moving window. Is there any eff...

ungefär 5 år ago | 0 answers | 1

Answered

Is I5 9400f processor is sufficient for deep learning, performing models,Monte Carlo simulation and other heavy works on Matlab

All MC methods are in general extremely CPU consuming. So, soon or later you always reach limits of your computer. From this poi...

Is I5 9400f processor is sufficient for deep learning, performing models,Monte Carlo simulation and other heavy works on Matlab

All MC methods are in general extremely CPU consuming. So, soon or later you always reach limits of your computer. From this poi...

mer än 5 år ago | 1

| accepted

Answered

Replace elements in binary matrix

% B original binary matrix % B_ new binary matrix B_ = ~B;

Replace elements in binary matrix

% B original binary matrix % B_ new binary matrix B_ = ~B;

mer än 5 år ago | 0

| accepted

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...

mer än 5 år ago | 0 answers | 0

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; ...

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; ...

ungefär 6 år 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 ...

ungefär 6 år ago | 3 answers | 0

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...

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...

ungefär 6 år 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...

ungefär 6 år ago | 3 answers | 0

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 ...

ungefär 6 år ago | 1 answer | 0

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...

mer än 6 år ago | 0 answers | 0

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...

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...

mer än 6 år ago | 0

Submitted

Fast unique random permutations

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

mer än 6 år 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...

mer än 6 år ago | 0 answers | 0

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))...

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))...

mer än 6 år 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 ...

mer än 6 år ago | 3 answers | 0

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...

mer än 6 år ago | 1 answer | 0

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 = ...

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 = ...

nästan 7 år 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...

integer strings decoding ... speed optimization

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

nästan 7 år 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...

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...

nästan 7 år 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...

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...

nästan 7 år ago | 2

| accepted

Answered

Function calculates wrong value

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

Function calculates wrong value

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

nästan 7 år 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: ...

nästan 7 år ago | 2 answers | 0

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)...

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)...

ungefär 7 år 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((...

ungefär 7 år ago | 2 answers | 0

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...

ungefär 7 år ago | 1 answer | 0

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...

ungefär 7 år ago | 0 answers | 0

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...

ungefär 7 år ago | 4 answers | 0