multiplying all the components of rand

Question

Young Chan Jung 2019-6-5

编辑： Matt J 2019-6-5

Hello, this is not really about rand, but since I am using rand...

For example, I want to have 3 sets of 3 different numbers. say A,B,C ; D,E,F ; G,H,I

I want to multiply components from each sets, making the total of final numbers 27. That is, 3*3*3 = 27

The numbers will be A*D*G, A*D*H, A*D*I, A*E*G, ... C*F*G, C*F*H, C*F*I.

obviously it was stupid of me to use the matrix... which will not work.

I also want this to be a array, not a matrix... or 1x27 matrix. not 3x9.

Please help me

Answer 1

Matt J 2019-6-5

编辑：Matt J 2019-6-5

[x,y,z]=ndgrid( [G,H,I] ,   [D,E,F],  [A,B,C]);
result=reshape(x.*y.*z,[],1)

Matt J 2019-6-5

Or, in R2016b and higher,

x=[G;H;I];
y=[D,E,F];
z=cat(3,A,B,C);
result=reshape(x.*y.*z,[],1)