Index of points which satisfy a given equation
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hellow everyone,
I am working on a problem in which I have defined following variables:
NodesAlongOneDirection = 10
x1 = 0; x2 = 1; Nx = NodesAlongOneDirection; x = linspace(x1, x2, Nx); dx = x(2) - x(1);
y1 = 0; y2 = 1; Ny = NodesAlongOneDirection; y = linspace(y1, y2, Ny); dy = y(2) - y(1);
[X, Y] = meshgrid(x, y); X = X(:); Y = Y(:); N = length(X);
Now I want to find index of points (index of X, Y) which satisfy any given equation, say, Y = -X +1, which is equation of "secondary diagonal" of square domain.
I have tried following lines:
A = find(Y == -X +1);
But it doesn't contain all the points on secondary diagonal.
Regards,
Ali Baig
2 Kommentare
Walter Roberson
am 3 Aug. 2019
You should not be using floating point equality as it demands bit for bit exact comparisons. You should compare with a tolerance.
Antworten (0)
Siehe auch
Kategorien
Mehr zu Resizing and Reshaping 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!