Question:Given an array update the second column by the square root of those values.
Answer:As rafaelc suggested, you can use np.sqrt on a specific column.
a = np.array([[1.,2.,3.],[1.,2.,3.]]) a[:,1] = np.sqrt(a[:,1])
ahas two rows and three columns.
a[:,1]is the second column.
If you have better answer, please add a comment about this, thank you!