topic min function bug in Mathcad

min function bug

ifomenko — Fri, 06 Jul 2018 05:34:31 GMT

A very simple task to find min of each column of a matrix but something strange happening.

Re: MatrixCol.min function problem

Werner_E — Thu, 05 Jul 2018 13:43:30 GMT

I would call this a strange bug.

I have no idea why it would occur. All I can do is provide a simplified example and some observations in case you intend to bring this bug to PTCs attention (good luck).

The bug shows up if the matrix has more than 1 column and is seen in all columns which include at least one text entry.

A crude workaround could be to always call the routine with MatrixCol.min(stack(...)) instead of just MatrixCol.min(...).

Indeed a very strange bug.

BTW, don't put M <-- stack(M) as first line in your program as if you do it will fail in any case when text is involved.

Re: MatrixCol.min function problem

Werner_E — Thu, 05 Jul 2018 13:53:56 GMT

Here's a better workaround.

Don't ask me why it works. Of course its still a bug.

Re: MatrixCol.min function problem

ifomenko — Thu, 05 Jul 2018 16:12:08 GMT

Thank you for your time and efforts. I`ve created some min.str.f() function to work around this bug.

Re: min function bug

VladimirN — Wed, 22 Aug 2018 16:12:42 GMT

1. What service release of Mathcad are you using?

2. Please send your issue for PTC's technical support: https://support.ptc.com/apps/case_logger_viewer/auth/ssl/log

Re: min function bug

ifomenko — Wed, 22 Aug 2018 19:06:52 GMT

15 M045