Subtraction matrixes with different dimensions

I have 2 massives C<32768x3> Al<20000x3> in which columns are (x,y,z). I need to find out all distances between C and Al. I try:

sqrt(((Al(:,1)-C(:,1))^2)+((Al(:,2)-C(:,2))^2)+((Al(:,3)-C(:,3))^2))

But I got error:

??? Error using ==> minus
Matrix dimensions must agree.

Answer 1

[dpb]

D = pdist2(X,Y);

See

doc pdist2  % note size of result will be length(X)*length(Y)

Answer 2

[Image Analyst]

distances = pdist2(C, Al);

pdist2 is in the Statistics and Machine Learning Toolbox. It gives the distance of every point in C to every point in Al.

Answer 3

[Jan]

Without the Statistics Toolbox and Matlab >= 2016b:

D = sqrt(((Al(:,1) - C(:,1).') .^ 2) + ...
         ((Al(:,2) - C(:,2).') .^ 2) + ...
         ((Al(:,3) - C(:,3).') .^ 2));

Answer 4

[Miroslav Zaharov]

It works! Thanks to all!