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# Jos (10584)

1,297 total contributions since 2006

Professional Interests: neuroscience, physics, mathematics

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linear fit of data
help polyfit

13 hours ago | 0

Is it possible to do this without for cycle?
% data Y = [1 1 3 2 3 1 1 2] % M = numel(Y) K = 3 % engine T = double((Y(:) - (1:K))==0)

16 hours ago | 0

Submitted

nextperm(V, K)
Next (lexicographic) permutation of values

Add zeros to matrices same as length of another matrix
To pad an matrix A with zeros to match a larger or same-sized array B, you can use this: A = magic(3) B = ones(3, 5) ...

5 days ago | 0

how do I convert a cell array of different size cells to a matrix
An easy job for padcat :) c = {{1 2}; {1 2 3};{4 5 6};{10 11 12 12 14}} % rather awkward cell array of cell arrays of n...

6 days ago | 0

How to eliminate zeros from array
a(~logical(a)) = []

6 days ago | 0

How to convert string to number and process underscores? (e.g. '57_77_' to 57.77)
all in one go: a = '12_23_' v = str2num(strrep(a(1:end-1), '_', '.'))

6 days ago | 1

hi everybody , i'm a beginner and don't know how can i convert ascii to a string
A = [51 48 56 ; 73 48 71] str = char(A) % conversion from ascii to character string

8 days ago | 0

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find max value within set parameters of matrix
If you want to mask out elements of a vector for finding the max, without disrupting the location within the vector, you might c...

8 days ago | 1

Array indexing for moving IQR
When N (= number of elements in A) and K (= number of elements to use) are not too large you could create an intermediate (N-K+1...

8 days ago | 0

Split a matrix at specific row
Use *mat2cell*: M = randi(20, 105,4) ; V = [11 12 11 11 12 12 13 11 12] ; C = mat2cell(M, V , size(M,2)) ;

8 days ago | 0

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How to find minimal distance between elements?
Without creating a possibly large intermediate N-ny-N matrix or using a possibly slow sort V = [1 8 6 4 2 10] ; W = ncho...

11 days ago | 0

Submitted

nchoose2(X)
all combinations of two elements

How to find minimal distance between elements?
By definition the minimum distance is zero because v(i)==v(i) for any element i of the vector v. But I assume you want the mi...

11 days ago | 0

assign values from logial vector to a new matrix with the same size
function B = functionA(A) B = A B(~(A>0)) = 0

12 days ago | 0

Compare segments of a vector
A = [2 2 2 2 2 3 6 3 4 5 1 1 1 1 1 2 3 4 5 6] AA = reshape(A,5,[]) dA = diff(AA,[],2) ix = all(dA>0) ix = 2*fin...

12 days ago | 0

Structs fields indexing issue
Parent.Child1.field_1 = [1 2 2 3] ; Parent.Child2.field_1 = [1 3 3 2 3 2] ; Parent.Child3.field_1 = [2] ; A = str...

13 days ago | 0

How to choose all other indices than ones I know?
Here are two options a = [11 12 13 14 15] i = [2 3] b1 = nan(size(a)) b1(i) = a(i) b2 = a i2 = setdi...

13 days ago | 1

Average distance of nonzero diagonal to the main diagonal for sparse matrix
In your example, you do not need to check the diagonals at all, just the first row and column of the matrix! A = [0 5 0 1 ...

13 days ago | 0

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Average distance of nonzero diagonal to the main diagonal for sparse matrix
Use the second argument of diag? A = sparse(cumsum(triu(ones(5)),2)) diag(A,1)

13 days ago | 0

How to Return two Matrix of dimension (T,N)
function [G, H] = MyInput(T,N) % do not name this function input, as this is already used by ML !!! G = zeros(T,N) ; % p...

13 days ago | 1

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How to find sampling rate from a signal vector and a time vector?
The sampling rate is the number of samples collected per second. In most typical cases, this is (roughly) a fixed (single) value...

13 days ago | 0

Reordering data based on a separate cell array
B = {'Si','W','Ou','In','We','Ru','Cy','El','St','Jo', 'In'} % example data Collections = { {'Si','St','W'},{'Ou','Jo','R...

13 days ago | 0

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How to place NaN at diagonal position in cell array?
a={[],-1,-1,0.8,-0.7,[],[]; [],[],0.9,1,[],-0.9,0.6; -1,[],[],0.9,0.2,[],0.8} sz = size(a) out = repmat({NaN}, sz + [0 1...

13 days ago | 1

How to place NaN at diagonal position in cell array?
Put NaNs on the diagonal: tf = eye(size(a))==1 a(tf) = {NaN}

13 days ago | 0

Move all NaN to end of matrix columns.
10+ years ago, I submitted the function *sortlind* to the Matlab File Exchange, which returns linear indices (rather than sub in...

13 days ago | 0

Submitted

sortlind(A, varargin)
sorts input and returns linear indices for parallel sorting

difference between normalization -1 to 1 and 0 to 1
The differences include the min, max, range, mean, median, variance, and many more properties of the normalised data.

14 days ago | 0