Take specific element value in a matrix

Question

Bui 2011-4-19

How can i take a specific element value inside a matrix? For example; A = [a11 a12 a13 a14; a21 a22 a23 a24; a31 a32 a33 a34; a41 a42 a43 a44]

i want to make V1 = a11, D1 = a12, V2 = a13, D2 = a14.

Any idea? :]

Oleg Komarov 2011-4-19

Why do you want to do that in the first place. Variable proliferation will become a nightmare (not to talk about referencing those values).

Answer 1

Andrei Bobrov 2011-4-19

example

A = randi(160,4)
A1row = num2cell(A(1,:))
[V1, D1, V2, D2] = A1row{:}

or

V1 = A1(1,1), D1 = A1(1,2), V2 = A1(1,3), D2 = A1(1,4)

or

k = 0;
for j = {'V1' 'D1' 'V2' 'D2'}
k = k +1;
eval([ j{:} ' = ' num2str(A(1,k))])
end

and etc

invers problem

VDinput = num2cell(randi(200,1,4))
[V1, D1, V2, D2] =VDinput{:}
A(1,:) = [V1, D1, V2, D2]

Oleg Komarov 2011-4-19

I would avoid teaching people eval...