Hello,
I need to create a contour plot based on 3 dimensional free data but I'm having issues. I've created a matrix with my data:
and try to do a contour plot but it does not graph it properly. I think the data must be defined on a grid of some sort but I'm not sure how to use CreateMesh since this is free data and not a function. FYI the data is the matrix is (frequency, tuning sensitivity, phase noise.)
I've also tried doing it as a 3-D plot and the data points show up correctly but I need it displayed in a contour format.
I'd appreciate any help.
Thanks,
Matt
You are correct, columns 0, 1, and 2 represent the x, y, and z data. Here is what my contour plot currently looks like:
which is obviouly not correct. If I try to put anything into the units placeholder it tells me "this variable is undefined" When you say (Mat<0>, Mat<1>,Mat<2>) is Mat short for Matrix?
matt eckdahl wrote:
You are correct, columns 0, 1, and 2 represent the x, y, and z data. Here is what my contour plot currently looks like:
which is obviouly not correct.
What I get (in Mathcad 11, I don't have Prime 2.0) is
If I try to put anything into the units placeholder it tells me "this variable is undefined"
I meant the plot component placeholder (the black square (or whatever Prime has) where you type the data to be plotted.
When you say (Mat<0>, Mat<1>,Mat<2>) is Mat short for Matrix?
Yes, sorry about that, I have a function in my library call Matrix so I shortened your variable name by reflex! 
matt eckdahl wrote:
I wish I had access to an older version of Mathcad.
If you've got Prime 2.0, you should either have, or be able to download, Mathcad 15
matt eckdahl wrote:
That is exactly what I'm looking for but I'm not able to get it to work in Prime. ... When I try entering what you show I get "unknown error: bad%_application"
There's an alternative format that works in M11 and M15, it might be worth trying - M is a 3x1 vector. The plot below shows a contour, surface and scatter plot of the same data.
What does Prime Help say about the input format for a contour plot?
I will look into the possibility of getting/using Mathcad 15 (which I would prefer to Prime) but in the meantime Prime help says (regarding input data):
So I think the issue I'm running in to is "the data matrix cannot contain free (x,y,z) data"
I tried to do the vector and for some reason it doesn't like that either. When I tried to plot Mat<0>,Mat<1>,Mat<2> earlier, as soon as I hit the comma it forces me to enter in the X,Y...Z format because it thinks I'm trying to enter a variable range. Man I'm not a fan of Prime so far.
