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DJF16-Pearl
16-Pearl
October 8, 2021
Solved

Prime 5-7 plotting bug - temperatures

  • October 8, 2021
  • 3 replies
  • 5345 views

This seems to be a bug.  Prime 7 won't plot degree C or F on the x-axis of a plot.  (Kelvin and Rankine work fine).  And degree C/F seem to work fine on the y-axis.  (I know degrees are technically functions and not units in mathcad, but this worked in version 4.  )  Is this a bug or a quirk?  any workaround (besides using absolute temp - which isn't very practical)  

 

Prime 4 file attached.  open in 5-7 and refresh and you should see the error.  

 

Thanks,

Best answer by DJF

PTC provided a workaround for now.  But should be fixed in 8.0  

2021-12-21_12-14-04.png

To enter the equation do the following:

Type T

Add the Scaling operator (Ctrl-Shift-u) or via operators menu

Add Parenthesis (Note:  DO NOT use the unit parenthesis that are in the plot)

Add degree F unit from Units menu

Add -1 exponent

 

Should look like this: (Note little dot after T and the exponent is located lower than normal.

equation.png

3 replies

L
LucMeekes23-Emerald IV
23-Emerald IV
October 8, 2021

Don't see the problem. Opened your file with Prime 7:

LucMeekes_0-1633716005909.png

Success!
Luc

S
StuartBruff23-Emerald V
23-Emerald V
October 8, 2021
@LucMeekes wrote:

Don't see the problem. Opened your file with Prime 7:

 

Success!
Luc

Did you Calculate the worksheet? 

 

I saw the problem in Express 7, even when I created a new Plot.

 

2021 10 08 D.png

 

Stuart

L
LucMeekes23-Emerald IV
23-Emerald IV
October 8, 2021

Yeah,  forgot to re-calculate.

Now I can confirm it's OK in Prime 4, broken as of Prime 5.

 

Luc

M
MSheykman5-Regular Member
5-Regular Member
October 12, 2021

We have a similar issue logged in our bug tracking system. Hope we will get to it sooner rather than later.

If you are a paying customer you can report this problem to tech. support.

V
24-Ruby III
VladimirN24-Ruby III
24-Ruby III
October 12, 2021

"Case Logger": https://www.ptc.com/en/support/case-logger

D
DJF16-PearlAuthorAnswer
16-Pearl
December 21, 2021

PTC provided a workaround for now.  But should be fixed in 8.0  

2021-12-21_12-14-04.png

To enter the equation do the following:

Type T

Add the Scaling operator (Ctrl-Shift-u) or via operators menu

Add Parenthesis (Note:  DO NOT use the unit parenthesis that are in the plot)

Add degree F unit from Units menu

Add -1 exponent

 

Should look like this: (Note little dot after T and the exponent is located lower than normal.

equation.png

    M
    MSheykman5-Regular Member
    5-Regular Member
    January 2, 2022

    It is fixed in Mathcad Prime 8. You will see the fix when it will be released.

      J
      JeffH116-Pearl
      16-Pearl
      May 11, 2022

      Confirmed.

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