Incomplete sheet

This sheet is incomplete and could use some attention. Please submit code snippet suggestions as an issue or PR here.

ND-arrays

ND-array operations

Create

Action	Code	Details
Ensure at least 1D array (vector)	np.atleast_1d(x)
Ensure at least 2D array (matrix)	np.atleast_2d(x)
Ensure at least 3D array	np.atleast_3d(x)
Create 2D array from a list of vectors as columns	np.column_stack([v1, v2])

Extract

Action	Code	Details
Number of elements	x.size
Number of dimensions	x.ndim
Dimension sizes	x.shape
Size of the first dimension	len(x)
Hash	hash(x.data.tobytes())

Derive

Shrink

Action	Code	Details
Drop singular dimensions	a.squeeze()
Drop singular dimensions	np.squeeze(a)

Reshape

Action	Code	Details
Reshape to dimensions d	x.reshape(d)

Convert

Action	Code	Details
Bytes	x.tobytes()	Not sure what difference with data.tobytes() is
Hash	hash(x.data.tobytes())