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MarkMcMullan1-Visitor
1-Visitor
June 28, 2011
Solved

Parametric Plotting Problem

  • June 28, 2011
  • 3 replies
  • 6902 views

Hi,

I am a Mathcad beginner, and would like to plot a function against one of the 4 variables it depends on. (I have attached my calc file, the plot I would like is on page 19.) I am able to get a point on the plot, but not a line. I can add another trace, and enter the variable value manually, but this only gives a second point. I know this must be very simple, but I just can't figure it out. I have tried to change Dp to a range (i:1,1.5..4) but with no joy.

Any help greatly appreciated!

Mark

Best answer by MikeArmstrong

I now have Mathcad Prime avaiable, see attached. Works with a range variable.

Mike

3 replies

M
MikeArmstrong1-Visitor
1-Visitor
June 28, 2011

Firstly I will have to apologise because I currently do not have access to Prime.

I am a Mathcad beginner, and would like to plot a function against one of the 4 variables it depends on.

If I'm getting you right, you want to plot hg against V.ru, t.g, D.p and delta.h, is this correct?

If so, these will need to be ranges. Can you save the file down to M15 format?

Mike

M
MarkMcMullan1-VisitorAuthor
1-Visitor
June 28, 2011

Hi Mike, I want Dp on the x-axis, and hg(Vru,tg,Dp,delta_h) on the y-axis, with Dp varying from 2-4m. I don't seem to have the ability to save in any other formats than xmcd or xps i'm afraid. I have attached a pdf if that is any use.

Thanks

Mark

M
MikeArmstrong1-Visitor
1-Visitor
June 28, 2011

I have attached a pdf if that is any use.

Not really.

I don't seem to have the ability to save in any other formats than xmcd or xps i'm afraid.

Do you mean mcdx?

You can try the following steps and see if you can get it to work. The function below and attached can be used to create a range vector instead of a range variable. Try defining D.p with the function and then use the vectorize built in function over hg, that should work.

Clipboard01.jpg

Mike

Message was edited by: Mike Armstrong

R
RichardJ19-Tanzanite
19-Tanzanite
June 28, 2011

You must be entering the range variable incorrectly. See the attached.

M
MikeArmstrong1-Visitor
1-Visitor
June 28, 2011

You snuck that one in there while I wasn't looking

Mike

M
MikeArmstrong1-Visitor
1-Visitor
June 28, 2011

On another note. Why are you making most of your variables functions of other variables. IMO your worksheet becomes very complicated later on.

Mike

M
MarkMcMullan1-VisitorAuthor
1-Visitor
June 28, 2011

I agree, it's horrendous! At this early stage I have them all in, but I hope to settle on some figures and remove them later on. Thanks for all the help - no doubt it won't be long until my next question - i'd be lost without it!

Mark

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