numpy recarray最小差异

Question

I have a numpy recarray I want to find record where difference of 1st element and last element of record is maximum.

can someone suggest a way to do this.

Answer 1

Set up:

import numpy
ra = numpy.recarray((10,), 'int,int,int')

Find the index of the maximum of the difference between first field and last field.

idx = numpy.argmax(ra['f0']-ra['f2'])

Retrieve the record using that index

print ra[idx]