| a.ndim |
returns the num. of dimensions or the rank |
| a.shape |
returns the num. of rows and colums |
| a.size |
returns the num. of rows and colums |
| arange(start,stop,step) |
returns a sequence vector |
| linspace(start,stop,steps) |
returns a evenly spaced sequence in the specificed interval |
| dot(a,b) |
matrix multiplication |
| vstack([a,b]) |
stack arrays a and b vertically |
| hstack([a,b]) |
stack arrays a and b horizontally |
| where(a>x) |
returns elements from an array depending on condition |
| argsort(a) |
returns the sorted indices of an input array |