Sort single column numpy arrays using another numpy array in Python

Question

Consider that I load columns from a text file using:

x, y, z = np.loadtxt(myfile, unpack=True)

What would be the syntax to sort x, y and z by increasing values of x ?

Answer 1

You want to use numpy.argsort

argsortx = np.argsort(x)
x, y, z = x[argsortx], y[argsortx], z[argsortx]