Re: Transpose[A]*A wrong?
- To: mathgroup at smc.vnet.net
- Subject: [mg41161] Re: Transpose[A]*A wrong?
- From: Torben Winther Graversen <immtwg at remove.student.dtu.dk>
- Date: Tue, 6 May 2003 05:59:33 -0400 (EDT)
- References: <b950vl$r49$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Daniel Lidstrom" <daniel.lidstrom at _delete_home.se> wrote:
: why does Mathematica give the wrong result here?
: In[2]:= Transpose[A]*A
Hi Daniel,
In Mathematica Transpose[A]*A is element-wise multiplication,
multiplication, which is exactly what you have shown. To get
matrix multiplication use "Dot":
Transpose[A] . A
Best regards,
Torben