An awesome tool for indexing matrices. propose a new concept “single index” (as in matlab) to index the elements from matrices. exchange python-style index(begin with 0) with matlab-style index(begin with 1)
Project description
Introduction
Abstract
An awesome tool for indexing matrices. propose a new concept “single index” (as in matlab) to index the elements from matrices. exchange python-style index(begin with 0) with matlab-style index(begin with 1)
Keywords
Index, Matrix, Single Index, Style of Index
New feature:
fix some bugs
Feature:
propose single index
change to (back from) matlab-style index
arithmetic of the index
Content
Classes:
SingleIndex: wrapper of int, list, slice Index: array of SingleIndex
Interface:
Arith: arithmetic of index
function:
irange: interval-like index
Grammar
Basic grammar
import:
import pindex # python for index
Example:
ind = SingleIndex([1,2,3]) # construct a single index s = ind('helloworld') # index(array) == array[index] print(s) A = np.array([[1,2,6],[3,4,5]]) B = ind(A) print(B) # index matrix with single index as in matlab ind.py2matlab() # change to matlab style s = ind('helloworld') print(s) # output: hel ind = Index([1,2,3]) # for 1dim array, Index == SingleIndex ss = ind('helloworld') print(ss) ind = Index(([1,2],[3,4])) # construct multi-index try: ss = ind(['hello', 'world']) print(ss) except: ind.py2matlab() ss = ind(['hello', 'world']) print(ss)
Attention:
ind = SingleIndex([1,2,3]) A = [[1,2,6],[3,4,5]] B = ind(A) # pindex.py thinks A is a list (of lists, with length 2) instead of matrix ind = Index(([0,1],[0,1])) # this is ok, since you use multi-index
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