Python Program Examples

Example 1:

The following Python example shows how to extract a particular column or row from the central data matrix "dl.dstore" and assign it to a vector. The vector x becomes a copy of column 13, the vector y becomes a copy of the row 4 (please note that array indexing in Python is 0-based, while in DataLab and in DLabPascal it is 1-based; thus the 13th column has the index 12 in Python): import datalab as dl from datalab import * x = dl.dstore[:,12] # extract column 13 y = dl.dstore[3,:] # extract row 4 print (x) print (y)

Example 2:

The following Python example shows how to square the values of the first column of the data matrix: import datalab as dl from datalab import * import numpy as np dl.dstore[:,0] = np.square(dl.dstore[:,0])