Suppsoe I have an array of size 10:
x = np.linspace(0.1, 1, 10)
I have an array of function values at these x's:
fx = np.sin(x)
Now I have a subarray of x
, say, for example,
sub_x = x[::2]
How do I extract the values of fx
at the sub-points in sub_x
? I.e.,
fx[indices of x that are in sub_x]
This does not work: fx[x == sub_x]
.
CodePudding user response:
This should do it:
fx[np.in1d(x, sub_x)]
CodePudding user response:
You can do it with np.isin
as:
fx[np.isin(x, sub_x)]