Keywords: gildas-python

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#### Functions

Functions must be imported from `NumPy` module. Among others:

- The `array()` built-in function: returns a `numpy.ndarray` from a list of elements (or list of lists,...), from a tuple (or tuple of tuples,...), or even from any valid `numpy.ndarray`. The array constructor also takes an optional `dtype` (see above), an optional `savespace` argument, and an optional `copy` argument (see below).
  Try also `ones()` or `zeros()` with a tuple containing dimensions as argument to create new arrays.

- The `size()` built-in function: displays the number of elements of the input array.

- The `rank()` built-in function: displays the number of dimensions of the input array (0 = scalar, 1 = vector, etc).

- The `len()` built-in function: displays the number of elements of the input array along the first dimension.

- See also: `reshape()`.