Re: expression form
- To: mathgroup at smc.vnet.net
- Subject: [mg101007] Re: expression form
- From: mark mcclure <mcmcclur at unca.edu>
- Date: Sat, 20 Jun 2009 04:02:09 -0400 (EDT)
- References: <h1hbj7$s2$1@smc.vnet.net>
On Jun 19, 8:47 pm, Haibo Min <yshdf... at gmail.com> wrote:
> Suppose a={a1,a2,a3},P={{p11,p12,p13},{p21,p22,p23},{p31,p32,p33}}.
> I want to get the explicit expression of a'Pa, where a' is the transpose
> of vector a.
One approach is represent a as a column vector. For example:
a = {{a1}, {a2}, {a3}};
P = {
{p11, p12, p13},
{p21, p22, p23},
{p31, p32, p33}
};
Transpose[a].P.a
Note that Transpose[a] can also be entered as a\[Transpose] to
nicely typeset working transpose operator.
Mark McClure