MATLAB: Exracting n characters from all elements of cell array

cell arrays

Hi,

I have some data in the following form and would like to extract separate the date and time components, therefore creating two arrays; the first using characters 1:10 and the second characters 12:19.

date_time =

    '01/01/2011 19:47:43'
    '01/01/2011 19:47:43'
    '01/01/2011 21:43:25'
    '01/01/2011 21:07:19'

I'm sure its a trivial problem but I can't quite do it

Best Answer

date1=datestr(date_time,'dd/mm/yyyy')
hour1=datestr(date_time,'HH:MM:SS')

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 p(y(i),:)= X(1:y(i),:)

Is trying to put a y(i) by "n" matrix into a 1 by "n" matrix, which CANNOT work.

 p(y(i),:)= X(y(i),:)

Is trying to put a 1 by "n" matrix into a 1 by "n" matrix, which can work, provided that "y" has enough elements.

If you define y to be a list of the ROWS you want (this is the way round you've got your code, swap the :, and y(i) round for columns):

 p = zeros(size(X)); % or ones, or NaNs, or whatever else as needed.
 y = [1 5 7 8 9 350];
 for i = 1:numel(y)
  p(y(i),:) = X(y(i),:);
 end

MATLAB: How to exract data from a figure and insert x and y values into a .mat file

z = [x(:), y(:)];
save('MatFileName', 'z')

Best Answer

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