How do i retrieve a specific value from a 2D matrix?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
David van Nederpelt
am 4 Jun. 2018
Beantwortet: Star Strider
am 4 Jun. 2018
Hello,
I've a matrix from which I want to get a specific value based on earlier calculations. So I want the value of B matched with A based on earlier calculated values (Thus the value of B which belongs to A)
earliercalculatedvalue = value from a certain function
if true
A = [0, 2.5, 5, 7.5, 10, 12.5, 13.5, 15];
B = [0.0433512251001877, 0.043577394493621, 0.0439878459898567, 0.044652541077113, 0.0450839697675535, 0.0458295673490097, 0.0461248505159152, 0.0465317879404617];
Matrix = [A;B];
Wantedvalue=Matrix(A==earliercalculatedvalue,:);
end
Thanks very much in advance!
2 Kommentare
Adam
am 4 Jun. 2018
And what is wrong with your code specifically? What are you getting as Wantedvalue?
Akzeptierte Antwort
Star Strider
am 4 Jun. 2018
One approach:
earliercalculatedvalue = 5;
Wantedvalue = B(A == earliercalculatedvalue) % Simplest
Wantedvalue = interp1(A, B, earliercalculatedvalue,'linear','extrap') % More Robust
give the same result for both:
Wantedvalue =
0.043987845989857
Wantedvalue =
0.043987845989857
0 Kommentare
Weitere Antworten (1)
Siehe auch
Kategorien
Mehr zu Logical 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!