subtraction ele by ele
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Offroad Jeep
am 5 Apr. 2015
Kommentiert: Image Analyst
am 6 Apr. 2015
hi all,
consider any two matrix A and B of 3X3 . i want to subtract every element of A from each element of B one by one. kindly tell the command please.
1 Kommentar
Stephen23
am 6 Apr. 2015
MATLAB allows you to do this all at once using vectorized code, rather than one-by-one. This is faster, neater, and much less buggy code!
>> A = rand(3);
>> B = rand(3);
>> A - B
ans =
-0.15016 -0.043791 0.13661
0.74818 0.14698 0.12512
-0.84361 -0.70274 0.041771
Akzeptierte Antwort
Image Analyst
am 5 Apr. 2015
Not sure what you mean so I'll offer the two possibilities:
result = A - B;
or
A = randi(100, 3, 3)
B = randi([1,9], 3, 3)
aVector = A(:)
bVector = B(:)
loopCounter = 1;
for k1 = 1 : length(aVector);
for k2 = 1 : length(bVector);
result(loopCounter) = aVector(k1) - bVector(k2);
loopCounter = loopCounter + 1;
end
end
% Print to command window
result
2 Kommentare
Image Analyst
am 6 Apr. 2015
So, was it the second chunk of code (which is completely different than doing A-B) that did what you want?
Weitere Antworten (1)
David Young
am 5 Apr. 2015
1 Kommentar
Star Strider
am 5 Apr. 2015
@4 X 4 —
David Young’s answer isn’t blank but maximally laconic. It is the ‘minus’ sign that will work for equally-sized matrices.
Siehe auch
Kategorien
Mehr zu Creating and Concatenating Matrices 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!