vectors from array

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

Answer 1

[David Young]

vector = array(:, column_number)

[Gary]

Thanks. How do I use a for loop to create three vectors from a n array with three colums.

[Paulo Silva]

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]

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]

How can I get separate vectors such as V1, V2 and V3. Thanks

[Paulo Silva]

see my Answer and http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

Answer 2

[Paulo Silva]

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