How to perform mathematical operation between all elements of arrays with unequal numbers
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Saeid
am 24 Mai 2019
Kommentiert: Saeid
am 24 Mai 2019
I have two arrays A & B, being a nXm and a pXq array, repsctively. I want to take A(i,j) and multiply it in or subtract it from all elements of B. Then I will take the next element of A and so on. is it possible to do without using a loop on all elements?
0 Kommentare
Akzeptierte Antwort
John D'Errico
am 24 Mai 2019
Bearbeitet: John D'Errico
am 24 Mai 2019
A = rand(2,3);
B = rand(4,5);
C = A + reshape(B,[1,1,size(B)]); % Addition
C = A - reshape(B,[1,1,size(B)]); % subtraction
size(C)
ans =
2 3 4 5
D = A .* reshape(B,[1,1,size(B)]); % multiplication
D = A ./ reshape(B,[1,1,size(B)]); % division
size(D)
ans =
2 3 4 5
This is possible as long as you have MATLAB release 2016b or later. Earlier releases will need to use bsxfun instead.
help bsxfun
Note that you use .* and ./ for elementwise multiplication/division, not the * or / operators.
Siehe auch
Kategorien
Mehr zu Operators and Elementary Operations finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!