MATLAB: Create a vector/matrix with .jpgs

vector matrix images

Hi!

I would like to create a vector or a matrix with .jpgs, that is, that there is a .jpg in each cell.

Later I would need to make matlab to present those jpgs randomly.

Can any of you help me?

Thanks! María

Best Answer

Just assign the cells

ca{1} = image1;
ca{2} = image2;

etc.

Then use randperm

numberOfCells = size(ca);
randomOrder = randperm(numberOfCells);
for k = 1 : numberOfCells 
  indexToDisplay = randomOrder(k);
  imshow(ca{indexToDisplay});
end

Related Solutions

MATLAB: How to perform multiplication in cells

First option: how about merging the numeric arrays together? Doing this would make these kind of calculations much easier! Read about vectorization to know why.

So assuming that for whatever reason your data absolutely cannot be converted to simple numeric arrays, then why not use arrayfun and cellfun to get the job done. This is a working example of how you could go about doing this:

>> A = {{[0,1],[1,1],[0,0]},{[1,1],[1,0],[0,0]},{[1,1],[0,1],[0,1]}}; %fake data
>> fun = @(C) arrayfun(@(c,n)c{1}*2^(7-n), C(1:2),1:2, 'UniformOutput',false);
>> out = cellfun(fun, A, 'UniformOutput',false);

I simplified your arrays down so that A has three cells, and each cell contains one sub-cellarray which contains three numeric vectors of size 1x2. The required function is defined by c{1}*2^(7-n), and it is preformed only on the contents of the first two cells of each of the sub-cellarray due to the indexing C(1:2),1:2.

But the best solution is to convert your data to simple numeric arrays.

MATLAB: Print content of a double to a table

A column in MATLAB's table can hold data of a single type. If you want to use all values, then you cannot have the first row with char arrays. Try this

b_1 = [1, 2, 5, 17, 25];
c_1 = numel(b_1);
D = cell(1, c_1);
for k = b_1
    tmp = sprintf('Scan %g', k);
    D{k} = tmp;
end
D = D(~cellfun('isempty',D));
u = sprintf('Scan %g', 1);
    T{1} = u;
Scans = [T , D; {rand(222,1)}, {rand(222,1),rand(222,1),rand(222,1),rand(222,1),rand(222,1)}]; %Time (1x1 cell and Dynamics (1xc_1 cell) both contain 222×1 doubles
Scans = array2table([Scans{2,:}]); 
display(Scans);

Best Answer

Related Solutions

MATLAB: How to perform multiplication in cells

MATLAB: Print content of a double to a table

Related Question