Re: Matrices as operators

*To*: mathgroup at smc.vnet.net*Subject*: [mg123027] Re: Matrices as operators*From*: Simon <simonjtyler at gmail.com>*Date*: Mon, 21 Nov 2011 04:26:12 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jaal4e$12d$1@smc.vnet.net>*Reply-to*: comp.soft-sys.math.mathematica at googlegroups.com

You could use a pure function: {{Cos@#, -Sin@#}, {Sin@#, Cos@#}}&[i] returns {{Cos[i], -Sin[i]}, {Sin[i], Cos[i]}}