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06-28-2011
06:35 AM

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06-28-2011
06:35 AM

Parametric Plotting Problem

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

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06-28-2011
08:41 AM

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06-28-2011
08:41 AM

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

Mike

8 REPLIES 8

06-28-2011
06:54 AM

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06-28-2011
06:54 AM

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

06-28-2011
07:03 AM

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06-28-2011
07:03 AM

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

06-28-2011
07:19 AM

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06-28-2011
07:19 AM

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.

Mike

Message was edited by: Mike Armstrong

06-28-2011
08:41 AM

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06-28-2011
08:41 AM

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

Mike

06-28-2011
08:35 AM

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06-28-2011
08:35 AM

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

06-28-2011
08:42 AM

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06-28-2011
08:42 AM

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

Mike

06-28-2011
08:50 AM

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06-28-2011
08:50 AM

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

Mike

06-28-2011
08:59 AM

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06-28-2011
08:59 AM

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