selecting a specific range in a matrix and cell array

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AA
AA 2014-12-23
回答： Image Analyst 2014-12-23
I have a large cell array with many matrices. I want to select row 1 and column 16 which has a matrix table. in that matrix table i want to select row 861. How do I do that?
a{1,16:861}

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Image Analyst
Image Analyst 2014-12-23
See the FAQ: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F
% Extract the matrix inside that cell in row 1, column 16
% of the cell array into a regular numerical array.
cellContents = ca{1,16}; % This is a regular normal matrix now
% Now extract row 816 from that matrix:
row861 = cellContents(861, :); % Get all columns of row 861 into row vector.

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Sean de Wolski
Sean de Wolski 2014-12-23
Just use two lines of code. There's no shame in doing this. And since MATLAB passes implicitly by reference anyway, it won't require a memory copy unless you change something.

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