spacepy.toolbox.bin_center_to_edges

spacepy.toolbox.bin_center_to_edges(centers)

Convert a list of bin centers to their edges

Given a list of center values for a set of bins, finds the start and end value for each bin. (start of bin n+1 is assumed to be end of bin n). Useful for e.g. matplotlib.pyplot.pcolor.

Edge between bins n and n+1 is arithmetic mean of the center of n and n+1; edge below bin 0 and above last bin are established to make these bins symmetric about their center value.

Parameters:

centerslist

list of center values for bins

Returns:

outlist

list of edges for bins

note: returned list will be one element longer than centers

Examples

>>> import spacepy.toolbox as tb
>>> tb.bin_center_to_edges([1,2,3])
[0.5, 1.5, 2.5, 3.5]