# emar

Last seen: nästan 3 år ago Active since 2017

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Parallel calculations on matlab
Hello, As discussed in other posts, I understood that some functions are parallelized in Matlab, so they are fast in serial c...

ungefär 7 år ago | 2 answers | 0

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Question

apply arrayfun for a couple of values
Hello, I wrote a syntax that calculate values of a function in different values. For example x1=[1 2 10 11]; x2...

ungefär 7 år ago | 1 answer | 0

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Question

calculate displacement between 2 images
Hello, I would like to ask a question about normalized cross correlation. Indeed,the steps of calculation of normalized c...

ungefär 7 år ago | 0 answers | 0

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Question

Effect of a translation on cross correlation
Hello, To find displacement of a particle, I calculated the cross correlation between two instants (represented by two images...

ungefär 7 år ago | 0 answers | 0

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Question

Maximum of normxcorr2
Hello, I need to calculate the maximum of normalized cross correlation of million of particles. The size of the two parameter...

ungefär 7 år ago | 0 answers | 0

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Question

Efficient use of memory
Hello, If i create a cell with 1000 matrices ( size of each matrix 800*1280), clearing each matrix after using it will speed ...

ungefär 7 år ago | 1 answer | 0

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Question

error " Assignment has fewer non singleton rhs dimensions than non singleton subscripts"
Hello, I have 2 arrays that represent indexes of a matrix, for example idx =[ 1 5 ] and idy = [ 2 3] . When I execute this line...

ungefär 7 år ago | 1 answer | 0

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Question

compare two arrays of different length ( inequality)
Hello, I have two arrays with different length, for example A =[ 2 3 11 0 8 ] and B=[ 2 6 8] ( The data are bigger in the real ...

ungefär 7 år ago | 2 answers | 0

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Question

()-indexing must appear last in an index expression
Hello, I wrote this code i=(find(A)~=0); % find indexes that verify this condition % B is a cell B(i) (end:A(i),en...

ungefär 7 år ago | 1 answer | 0

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Question

load a parallel pool constant
Hello, I built a parallel pool constant from a cell(55,1) which contains large matrix's, and it took 5 minutes. When i don't ...

ungefär 7 år ago | 0 answers | 0

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Question

different result between gpuArray / matrix
Hello, I tried to compare the result between two codes two inputs with the same function: function local_sum_A = local_sum...

mer än 7 år ago | 0 answers | 0

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Question

my code is slower with a parfor loop
Hello, I ran this code in a computer with 44 workers. However, it's slower than the for version. template=cell(31,1...

mer än 7 år ago | 1 answer | 0

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Question

cell as an input argument for normxcorr2
Hello, I want to calculate normalized cross correlation for an image with a lot of templates(31 templates). When I define templ...

mer än 7 år ago | 0 answers | 0