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[mathcad] Contouring irregular data

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[mathcad] Contouring irregular data
Author: Rob Beale    Posted: Thu, 24 Jul 2008 10:49:17 +0100
I have data in the form of x,y and z coordinates which is bounded by a rectangular region from a set of experimental data. As the data is not defined over a regular grid is there any way that Mathcad can produce contour plots of the data? I look forward to hearing fro you Robert Beale --- The Mathcad List - Discussion, Support & News Contributions: /> Hosted by: Adept Scientific http://www.adeptscience.com List Archive: http://lists.adeptscience.co.uk/ --- Would you like this to come to a different email address? --- Simply leave the mailing list (see below) and re-join by sending a blank email from the new address to: or --- You are currently subscribed to mathcad as: /> To unsubscribe send a blank email to />

Re: [mathcad] Contouring irregular data
Author: William J Marshall    Posted: Thu, 24 Jul 2008 09:52:21 -0400
I can't help you on this question, Rob. But while we're on the subject of contour plots, I have not succeeded in placing (overlaying) a single data point on a contour plot. Does anybody have a hint? The Help page "Graphing Multiple 3D Plots" says you can add additional matrices to form additional plots, but it's not clear to me what the result would be for contour plots (interfering contours might require careful color choices, etc.). I tried adding a simple 3-element vector [x0, y0, z0] for my isolated 2nd point, but this didn't work. I see elsewhere in Help that "A plotted matrix must have at least two rows and two columns" so I'm going to try forming a triangle on the plot surface by expanding my vector to a 3x3 matrix with neighboring x and y values and identical z values. Mathcad might then recognize this as a dataset for which a contour can be defined. - Bill P.S. It looks like I may have answered my own question while typing a description of the problem. Well, that happens sometimes. Rob Beale 07/24/2008 07:41 AM Please respond to /> To /> cc Subject [mathcad] Contouring irregular data I have data in the form of x,y and z coordinates which is bounded by a rectangular region from a set of experimental data. As the data is not defined over a regular grid is there any way that Mathcad can produce contour plots of the data? I look forward to hearing fro you Robert Beale --- The Mathcad List - Discussion, Support & News Contributions: /> Hosted by: Adept Scientific http://www.adeptscience.com List Archive: http://lists.adeptscience.co.uk/ --- Would you like this to come to a different email address? --- Simply leave the mailing list (see below) and re-join by sending a blank email from the new address to: or --- You are currently subscribed to mathcad as: /> To unsubscribe send a blank email to /> --- The Mathcad List - Discussion, Support & News Contributions: /> Hosted by: Adept Scientific http://www.adeptscience.com List Archive: http://lists.adeptscience.co.uk/ --- Would you like this to come to a different email address? --- Simply leave the mailing list (see below) and re-join by sending a blank email from the new address to: or --- You are currently subscribed to mathcad as: /> To unsubscribe send a blank email to

RE: [mathcad] Contouring irregular data
Author: Stuart Bruff    Posted: Thu, 24 Jul 2008 22:35:15 +0100
Bill, You can add a single point if you plot it as a data point. See attached. Stuart -----Original Message----- From: William J Marshall Sent: 24 July 2008 2:52 PM To: /> Subject: Re: [mathcad] Contouring irregular data I can't help you on this question, Rob. But while we're on the subject of contour plots, I have not succeeded in placing (overlaying) a single data point on a contour plot. Does anybody have a hint? The Help page "Graphing Multiple 3D Plots" says you can add additional matrices to form additional plots, but it's not clear to me what the result would be for contour plots (interfering contours might require careful color choices, etc.). I tried adding a simple 3-element vector [x0, y0, z0] for my isolated 2nd point, but this didn't work. I see elsewhere in Help that "A plotted matrix must have at least two rows and two columns" so I'm going to try forming a triangle on the plot surface by expanding my vector to a 3x3 matrix with neighboring x and y values and identical z values. Mathcad might then recognize this as a dataset for which a contour can be defined. - Bill P.S. It looks like I may have answered my own question while typing a description of the problem. Well, that happens sometimes. --- The Mathcad List - Discussion, Support & News Contributions: /> Hosted by: Adept Scientific http://www.adeptscience.com List Archive: http://lists.adeptscience.co.uk/ --- Would you like this to come to a different email address? --- Simply leave the mailing list (see below) and re-join by sending a blank email from the new address to: or --- You are currently subscribed to mathcad as: /> To unsubscribe send a blank email to
Attachments:  adept - single point over a contour plot 01.mcd

Re: [mathcad] Contouring irregular data
Author: Tom Gutman    Posted: Thu, 24 Jul 2008 22:00:15 -0700
When you have multiple plots in a graph each one can be a different type. Usually you would not have more than one contour plot, which will occupy the X-Y plane. To plot points over a contour plot they would usually be plotted the usual way you would plot points -- as scatter plots. Tom Gutman ----- Original Message ----- From: "William J Marshall" /> To: /> Sent: Thursday, July 24, 2008 6:52 AM Subject: Re: [mathcad] Contouring irregular data >I can't help you on this question, Rob. But while we're on the >subject of > contour plots, I have not succeeded in placing (overlaying) a single > data > point on a contour plot. Does anybody have a hint? > > The Help page "Graphing Multiple 3D Plots" says you can add > additional > matrices to form additional plots, but it's not clear to me what the > result would be for contour plots (interfering contours might > require > careful color choices, etc.). I tried adding a simple 3-element > vector > [x0, y0, z0] for my isolated 2nd point, but this didn't work. I see > elsewhere in Help that "A plotted matrix must have at least two rows > and > two columns" so I'm going to try forming a triangle on the plot > surface by > expanding my vector to a 3x3 matrix with neighboring x and y values > and > identical z values. Mathcad might then recognize this as a dataset > for > which a contour can be defined. > > - Bill > > P.S. It looks like I may have answered my own question while typing > a > description of the problem. Well, that happens sometimes. > > > > > Rob Beale /> > 07/24/2008 07:41 AM > Please respond to > /> > > > To > /> > cc > > Subject > [mathcad] Contouring irregular data > > > > > > > I have data in the form of x,y and z coordinates which is bounded by > a > rectangular region from a set of experimental data. As the data is > not > defined over a regular grid is there any way that Mathcad can > produce > contour plots of the data? > > I look forward to hearing fro you > > Robert Beale > > --- > The Mathcad List - Discussion, Support & News > Contributions: /> > Hosted by: Adept Scientific http://www.adeptscience.com > List Archive: http://lists.adeptscience.co.uk/ > --- > Would you like this to come to a different email address? > --- > Simply leave the mailing list (see below) and re-join by > sending a blank email from the new address to: > or > --- > You are currently subscribed to mathcad as: > /> > To unsubscribe send a blank email to > /> > > > > > --- > The Mathcad List - Discussion, Support & News > Contributions: /> > Hosted by: Adept Scientific http://www.adeptscience.com > List Archive: http://lists.adeptscience.co.uk/ > --- > Would you like this to come to a different email address? > --- > Simply leave the mailing list (see below) and re-join by > sending a blank email from the new address to: > or > --- > You are currently subscribed to mathcad as: > /> > To unsubscribe send a blank email to > --- The Mathcad List - Discussion, Support & News Contributions: /> Hosted by: Adept Scientific http://www.adeptscience.com List Archive: http://lists.adeptscience.co.uk/ --- Would you like this to come to a different email address? --- Simply leave the mailing list (see below) and re-join by sending a blank email from the new address to: or --- You are currently subscribed to mathcad as: /> To unsubscribe send a blank email to />

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