Element by Element Subtraction
107 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Sanim Rahman
am 10 Dez. 2017
Kommentiert: anuforo peter
am 7 Mär. 2020
I am trying to do element by element subtraction like the following:
a= [1,2,3,4,5] b= [-1,-2,-3]
I would like my output to be "a" to be subtracted by the first element of "b" then by the second element and so on. The output "c" should look like: c=[2,3,4,5,6,3,4,5,6,7...]
I understand that if I simply do "c=a-b" will not work because the dimensions do not agree. Would something like this require a loop?
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 10 Dez. 2017
Try this:
a= [1,2,3,4,5]
b= [-1,-2,-3]
c = a' - b;
c = c(:)'
You get
c =
2 3 4 5 6 3 4 5 6 7 4 5 6 7 8
in R2016b (I believe) or later that has automatic expansion capability.
3 Kommentare
Weitere Antworten (1)
Kaushik Lakshminarasimhan
am 10 Dez. 2017
minus operator in Matlab can inherently handle this, so you don't need a loop. Checkout >> help minus. For your case, something like this will work.
a= [1,2,3,4,5]; b= [-1,-2,-3];
c = reshape(a'-b,1,numel(a)*numel(b));
0 Kommentare
Siehe auch
Kategorien
Mehr zu Loops and Conditional Statements 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!