What is ind2sub
71 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Varun Nair
il 19 Lug 2021
Modificato: Walter Roberson
il 23 Lug 2021
This is the code where I had doubt on the syntax of ind2sub
%Parameters
A=0.01; %Wb is the unit of A
B=0.001; %H is the unit of Inductance
I =(0:1:2); %row!
theta=(0:1:45).'; %column!
T = - A .* I .* cosd(theta) + B .* I.^2 .* sind(2*theta);
surf(I, theta, T)
xlabel('I'); ylabel('theta'); zlabel('Torque')
[maxT, idx] = max(T(:));
[r,c] = ind2sub(size(T), idx);
best_theta = theta(r);
best_I = I(c);
fprintf('best torque is %g at theta = %g and I = %g\n', maxT, best_theta, best_I);
0 Commenti
Risposta accettata
Star Strider
il 20 Lug 2021
Modificato: Walter Roberson
il 23 Lug 2021
MATLAB uses linear indexing for arrays, however many arrays are also referred to by subscripts into the rows, columns, and additional dimensions. The ind2sub function converts the linear indices into subscripts.
In this example:
[maxT, idx] = max(T(:));
[r,c] = ind2sub(size(T), idx);
the ind2sub call takes linear index ‘idx’ and converts it to the appropriate subscripts into matrix ‘T’. (It appears to be completely appropriate here.)
.
2 Commenti
Più risposte (0)
Vedere anche
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!