[mathcad] RE: Mathcad bug or programming error?

Author: Pergande, Albert N Posted: Mon, 28 Jan 2008 15:03:25 -0500

Your problem seems to be in assigning "phi s" to "phi super s". Every
time you make the assignment with a new values of S, you create a new
phi with a single column vector. I suggest you do phi <-- augment (phi,
phi s) You will need to create a dummy vector phi, or handle the column
0 case as an exception.

Al Pergande
Senior Radar Engineer
Lockheed Martin Missiles and Fire Control
MP 200
5600 Sandlake Road
Orlando, Fl 32819

Voice 407-356-5169
Fax 407-356-0933
"albert.n.pergande"
for personal mail - "al"

________________________________

From: "Andy.Spragg" "mailto:Andy.Spragg"
Sent: Monday, January 28, 2008 8:11 AM
To: Mathcad Discussion List
Subject: [mathcad] Mathcad bug or programming error?

Hi folks,

The attached v11 worksheet contains two versions of a program, that I
believe to be trivially different. The output from the two versions is
utterly different. I spent altogether too long trying to find the error
of my ways in one version, before scraping the barrel of reformulation
and finding it not to be empty after all.

I seek opinions on whether the difference in output is due to Mathcad
bug or programming error. If the former is the case, it is a pretty
toxic bug (which may of course have long since been squashed). Can
anyone please either point out my error, or test these programs in the
current version of Mathcad?

Andy

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