Custom Unit of Measure

Forum|Forum|1 year ago
April 22, 2025
2 replies
2317 views

Good morning to all,

for my calculation I've to deal with badly conditioned matrices. The matrices includes terms with its own unit of measure. The bad conditioning is coming (also after some simple numerical tests) from the very different order of magnitude of the terms and it could be reduced introducing, new, custom unit of measures (such as for example MegaNewton for example). I know how to introduce custom unit of measures in input. BUT what I want is that for an entire spreadsheet (or even a region) a custom unit system is used; said differently I want that the results are in the custom unit of measures: how can I do? Many thanks in advance

Mathcad Usage

Best answer by Werner_E

As far as I know things like default custom units are planned by PTC for some future version.

At the time being such a feature is not available and you would have to manually change the units of your results, which, unfortunately is also not possible to do if a matrix contains values of different dimensions.

BTW, using custom units like MN would not affect the bad conditioning because internally Prime will always calculate with values in the default SI unit.

T

terryhendicott

21-Topaz II

Hi,

Are you making structural stiffness matrices?

Cheers

Terry

F

FB_10795922

Author

5-Regular Member

....close to it....transfer matrix for modal analysis...

W

Werner_E

Answer

25-Diamond I

As far as I know things like default custom units are planned by PTC for some future version.

At the time being such a feature is not available and you would have to manually change the units of your results, which, unfortunately is also not possible to do if a matrix contains values of different dimensions.

BTW, using custom units like MN would not affect the bad conditioning because internally Prime will always calculate with values in the default SI unit.