Simulate an N-dimensional region with one or more peaks.
Parameters :
shape : tuple of ints
Shape of region.
lineshapes : list
List of lineshapes by label (str) or a lineshape class. See
fit_NDregion() for additional documentation.
params : list
P-length list (P is the number of peaks in region) of N-length lists
of tuples where each each tuple is lineshape parameters for a given
peak and dimension.