MATLAB: How to add NaNs to each of a set of vectors of different lengths to make them all the same length please

uneven vectors

I have 13 columns that I'd like to put into a matrix, but they are different lengths. I can add NaN to them to make them the same length; if the max length is say 5000, how do I add NaNs to the others to make them all 5000 please?

Best Answer

Matrix = nan(5000,13);
Matrix(1:length(FirstVariable), 1) = FirstVariable;
Matrix(1:length(SecondVariable), 2) = SecondVariable;

and so on.

If the values were in a cell array then there would be other methods available as well.

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MATLAB: Handling audio files

Check this out:

% v1, v2 - two vectors are given
len1=length(v1);
len2=length(v2);
%
LEN=min(len1, len2);
V1=v1(1:LEN);
V2=v2(1:LEN);
% V1, V2 are vectors with same length

MATLAB: How to find the start and end points of overlapping intervals in one array

a = [ 1.5000 95.5000; 82.5000 150.5000; 141.5000 197.5000; 191.5000 357.5000; 400.5000 438.5000; 415.5000 481.5000; 519.5000 667.5000];
b =  reshape(a',1,[]);
ii = strfind(sign(diff(b)),[-1 1]);
out = b;
out([ii,ii+1]) = [];

add

b =  reshape(a',1,[]);
x = all(tril(bsxfun(@lt,b(:),b(:)'))==0,2);
i0 = strfind(x(:)',[1 0]);
x(i0) = false;
out = b(x);

add2

a = [ 4.5000   58.5000
    4.5000   58.5000
   65.5000  118.5000
   65.5000  118.5000
  140.5000  277.5000
  140.5000  277.5000
  206.5000  223.5000
  206.5000  223.5000
  284.5000  295.5000
  284.5000  295.5000
  360.5000  422.5000
  360.5000  422.5000
  449.5000  454.5000
  449.5000  454.5000
  449.5000  532.5000
  449.5000  532.5000
  532.5000  574.5000
  532.5000  574.5000]
a1 = unique(a,'rows');
out = a1(1,:);
for jj = 2:size(a1,1)
    if out(end,2) > a1(jj,1) && a1(jj,2) > out(end,2)
        out(end,:) = [out(end,1) a1(jj,2)];
    elseif out(end,2) <= a1(jj,1)
        out(end + 1,:) = a1(jj,:);
    end
end

a1 = unique(a,'rows');
for jj = 2:size(a1,1)
    if a1(jj-1,2) > a1(jj,1) && a1(jj,2) > a1(jj-1,2)
        a1(jj,1) = 0 ;
        a1(jj-1,2) = 0;
    elseif a1(jj-1,2) >= a1(jj,2)
        a1(jj,:) = 0;
    end
end
out = a1';
out = reshape(out(out>0),2,[])';

Best Answer

Related Solutions

MATLAB: Handling audio files

MATLAB: How to find the start and end points of overlapping intervals in one array

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