Re: Re: Summary:Ways to get Odd Columns&Rows of Matrix

*To*: mathgroup at christensen.cybernetics.net*Subject*: [mg1047] Re: [mg715] Re: Summary:Ways to get Odd Columns&Rows of Matrix*From*: Allan Hayes <hay at haystack.demon.co.uk>*Date*: Wed, 10 May 1995 08:35:36 -0400

Count Dracula, <lk3a at kelvin.seas.virginia.edu>, [mg715] Re: Summary:Ways to get Odd Columns&Rows of Matrix Gives the definition odd[tensor_List] := Part[ tensor, Sequence @@ (Range[1, #, 2] &) /@ Dimensions[tensor] ] Since Range has the attribute Listable this can be tidied up to odd2[tensor_List] := Part[ tensor, Sequence @@ Range[1, Dimensions[tensor], 2] ] There is little, if any, effect on the speed. Allan Hayes hay at haystack.demon.co.uk