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# Jos (10584)

1 427 total contributions since 2006

Professional Interests: neuroscience, physics, mathematics

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How to change character in multiple cells in to number 0 and 1?
Sex = {'F','M','F','F','M','M','F'} [~, SexNum] = ismember(Sex, {'F','M'}) SexNum = SexNum - 1 % 1 = 'M', 0 = 'F', -1 = other ...

2 jours ago | 0

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load files whith a previus specified name
Didn't you just make a simple typo? % Aplha vs Alpha % | |

2 jours ago | 1

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Using numpad 8 2 6 4 as North South East West
Perphaps my getkey function may be of use to you: https://www.mathworks.com/matlabcentral/fileexchange/7465-getkey

10 jours ago | 0

I keep getting the error message that vectors must be the same length in the plot command
So, apparently the two vectors are not of the same length. You really should learn how to debug your own code. Set a breakpoint ...

16 jours ago | 1

Select random elements from three consecutive columns in a big matrix?
M = magic(5) % input data N = 4 % number of selections nC = 3 % number of consecutive columns % engine szM = size(M) r...

16 jours ago | 0

select random row inside the cell
You want the row, or the row number to be returned? A={[1,4,6;6,5,4;1,2,4],[1,3;5,4],[1,2;1,7;6,8]} rownumber = cellfun(@(c)...

16 jours ago | 0

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Writing a Matrix 6x6 in one line
help reshape

17 jours ago | 0

Vectorizing nested for loops
A = magic(5) d = squareform(pdist(transpose(A))) % transpose to obtain vecnorm between columns pdist and squareform are part ...

18 jours ago | 1

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how to find the element which is greater than or equal to its row and smaller or equal to its column in a matrix
function out = saddle(M) [r, c] = ind2sub(size(M), 1:numel(M)) ; tf = arrayfun(@(r, c) all(M(r, c) >= A(:, c)) && all(M(r, c) ...

18 jours ago | 0

omit same element inside cell
You can convert the elements of each cell to a char array and apply unique on that cell array of chars. A = {[1,2,3,4],[4,2,3],...

18 jours ago | 1

How to store vectors into a matrix that have different sizes?
Next to cell arrays, you can also use struct arrays, which can be more ... euh ... structured than cell arrays ;-) a(1).data = ...

18 jours ago | 0

Repeating or rerunning a loop
Use a while loop, which is more flexible than a for -loop. Something like this might work: seq = [3, 1, 2, 1, 3, 2]; % trial se...

20 jours ago | 0

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Probability of exactly one even number
I suggest you use two counters: one counting the numbers of even values in a single throw, and one counting the number of throws...

21 jours ago | 1

How can I get a infinite loop in matlab?
an infinite loop k = 0 ; while true % useful code here k = k + 1 ; disp(k) end But are you sure you want an...

22 jours ago | 0

How to use varargin: to specify a second input variable with separate output
You cannot compare strings with different lengths using ==. Use isequal or strcmpi instead, for instance: if isequal(lower(vara...

23 jours ago | 1

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Removing a Range of Elements from an array
ix = find(M(:,12) > 750, 1, 'first') % find the row index of the first element in the 12th column of A being larger than 750 M...

24 jours ago | 0

How do i average all result in total loop,if some result in some of loop are NaN
Store each result in an array and average after the loop. An example: c = nan(1,10) ; % pre-allocation for speed for k = 1:10 ...

26 jours ago | 0

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Counting occurrences of a pair of numbers in a logical vector
A vectorised alternative: A = [0 1 0 0 1 0 0 0 0 0 1 1 0 0 1 0 1 ]; % Input vector ix = find(A) ix = ix(2:2:end) B = cumsum(...

28 jours ago | 0

Using range in a vector
I am a little confused by your problem, but here are my thoughts. You might want to use the function ANY, or its sibling ALL, or...

environ un mois ago | 0

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There is an error in exp function but it doesn't tell what the error is?
Use dbstop if error and inspect the contents of the variables! You'll see what is wrong :-)

environ un mois ago | 0

Set up an OR argument for equation
Simpler, without an if-else: v = (xdot_1-xdot_2)).*(sign(x1-x2-gap)+1)/2; fp = (k_inp*(x1-x2-gap) + (v>0) * c_inp * (xdot_1-xd...

environ un mois ago | 0

Set up an OR argument for equation
Can't you use logical indexing? A simplified example v = 10:20 q = v > 13 & v < 18 f(q) = 2*v(q) f(~q) = 30 + v(q)

environ un mois ago | 1

How can I compare two measurements which are composed of matrices such as [0 1 0 0...]
You are looking for a measure of consistency between two measurements which are represented as binary vectors of the same length...

environ un mois ago | 0

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How can I make each cell array consistent in length?
A final attempt to answer this question :-) C = {1:4 1:2 ; 1:5 1:6 ; 1 1:3} % a m-by-n cell array N = cellfun(@numel, C) % old...

environ un mois ago | 1

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split a diagonal matrix
Having a vector V with any number of elements, this does the job: V = [2 1 4] n = numel(V) ; M = zeros(n,n,n) ; M(linspace...

environ un mois ago | 1

Extracting columns from a matrix, corresponding start and end times
The easiest approach is to create a for loop over the events Nevents = nume(EventTimes) R = zeros(64, 250, Nevents) % pre-allo...

environ un mois ago | 0

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How can I make each cell array consistent in length?
C = {1:3 4 ; 5:9 10:12 ; 13:14 15} % a m-by-n cell array N = cellfun(@numel, C) maxN = max(N(:)) padfun = @(v) [v zeros(1, m...

environ un mois ago | 1

replace values with nans
Take a look at logical indexing or the function ind2sub M = randi(10,8,6) % use indices of elements for which condition is tru...

environ un mois ago | 0

Rearranging Array Rows into Multiple Blocks while Maintaining the Old Order
You should learn about indexing, one of the most essential aspects of Matlab: M = randi(4,10,5) ; M(:,1) = 1:size(M,1) % exampl...

environ un mois ago | 1

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