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A
Anonymous
September 2, 2016
Question

auto scale function for a 2D plot is not working??

  • September 2, 2016
  • 3 replies
  • 1788 views

I created a 2D plot for two dependant variables and one independant variables.  The plot is for dowel bearing strengths of wood loaded parallel and perpindicular to grain.  The actual values loaded parallel to the grain vary from 3400 psi to 9000 psi and those perpindicular to grain vary from 1500 psi to 6250 psi.  The mathad plot  shows them as 10,000,000 to 40,000,000 psi

3 replies

W
Werner_E25-Diamond I
25-Diamond I
September 2, 2016

Its always better to attach the worksheet rather than just posting a picture.

What you see is the pressure in the standard unit Pa. It has nothing to do with "autoscale".

If you plot entities with units you can devide by the unit you would like to see.

At the ordinate write  F.e(...) / psi.

Here some examples. If you don't divide by units yourself you see the result in Mathcads standard units (here m^2 and Pa):

WE

V
VladimirN24-Ruby III
24-Ruby III
September 6, 2016

Please attach your Mathcad worksheet.

S
StuartBruff23-Emerald V
23-Emerald V
September 6, 2016

Werner's point is so key to understanding units in Mathcad that it bears repeating.

Mathcad calculates internally using SI units.

Although Mathcad (15 and below) has the ability to work in different quantity systems (such as CGS and US), the results may not always be what is expected due to how derived units are represented.

Look at these two examples:

Stuart

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