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[mathcad] Contouring irregular data
| [mathcad] Contouring irregular data |
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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
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| Re: [mathcad] Contouring irregular data |
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Author: William J Marshall
Posted: Thu, 24 Jul 2008 09:52:21 -0400
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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 "rgbeale"
07/24/2008 07:41 AM
Please respond to
"mathcad"
To
"mathcad"
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
|
| RE: [mathcad] Contouring irregular data |
|
Author: Stuart Bruff
Posted: Thu, 24 Jul 2008 22:35:15 +0100
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Bill,
You can add a single point if you plot it as a data point. See attached.
Stuart
From: William J Marshall "mailto:William_J_Marshall"
Sent: 24 July 2008 2:52 PM
To: "mathcad"
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.
|
|
Attachments:
adept - single point over a contour plot 01.mcd
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| 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
From: "William J Marshall" "William_J_Marshall"
To: "mathcad"
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 "rgbeale"
> 07/24/2008 07:41 AM
> Please respond to
> "mathcad"
>
>
> To
> "mathcad"
> 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
>
> Contributions: "mathcad"
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> Contributions: "mathcad"
> Hosted by: Adept Scientific http://www.adeptscience.com
> List Archive: http://lists.adeptscience.co.uk/
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