Return a copy of the array collapsed into one dimension.
Parameters:
order{‘C’, ‘F’, ‘A’, ‘K’}, optional
‘C’ means to flatten in row-major (C-style) order.
‘F’ means to flatten in column-major (Fortran-
style) order. ‘A’ means to flatten in column-major
order if a is Fortran contiguous in memory,
row-major order otherwise. ‘K’ means to flatten
a in the order the elements occur in memory.
The default is ‘C’.
Returns:
yndarray
A copy of the input array, flattened to one dimension.
