vectors from array

2011 12 14
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What is the best way to create vectors from columns of an array?

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David Young
David Young 2011-12-14

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vector = array(:, column_number)

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Gary
Gary 2011-12-14
Thanks. How do I use a for loop to create three vectors from a n array with three colums.
Paulo Silva
Paulo Silva 2011-12-14
a=randi(5,5,3) %sample array
for n=1:size(a,2)
b{n}=a(:,n);
end
c=1; %choose the column
v=b{c} %get the vector of that column
David Young
David Young 2011-12-14
In general, how you do this depends on what you are going to do with the vectors. It may be simplest to leave the original array as it is, and simple use array(:, column_number) at the point in your program where you need the vector on its own.
Gary
Gary 2011-12-14
How can I get separate vectors such as V1, V2 and V3. Thanks
Paulo Silva
Paulo Silva 2011-12-14
see my Answer and http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

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Paulo Silva
Paulo Silva 2011-12-14

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a=randi(5,3,5) %sample array
%put all columns of the array in diferent cells
b=arrayfun(@(x)a(:,x),1:size(a,2),'uni',0);
c=1; %choose the column
v=b{c} %get the vector of that column

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