MaplePrimes - answers and comments on Question, Contourplot with 3d Points

listcontplot

Carl Love — Sat, 23 Mar 2013 19:18:04 Z

The command is plots:-listcontplot(M, contours= [$1..20]). But you need to lay out your points in a grid form, which involves some sorting and approximating. I vaguely recall seeing a tool for this a many years ago. I will look for it.

The Matrix should only contain the z-values

Carl Love — Tue, 26 Mar 2013 20:18:08 Z

This is rather tricky to do and even to describe: The Matrix that you pass to listcontplot should only contain the z values. The x and y values are determined implicitly by the position in the Matrix. I see that you have 1116 data points. Since 1116 = 36 x 31, I will suppose (just for the sake of exposition, here) that you have 36 x values and 31 y values. In that case your Matrix should have dimensions 31 x 36.

If you post your matrix of (x,y,z) data, I will work on putting it into the required format.

Thanks alost. But still it doesnt work like

DaGu — Tue, 26 Mar 2013 15:10:54 Z

Thanks alost. But still it doesnt work like i want it to do.

Here is the result i get atm:aand a shot set of entries in "l"

hum well i got 1116x3 Data points:) Should

DaGu — Tue, 26 Mar 2013 22:08:40 Z

hum well i got 1116x3 Data points:) Should be a bit "long".

So 1116 x values, 1116 y values and 1116z values. What i'am thinking about is to detmine the highest x and y value in my list multiply it by 100 ( so i have like 1220 instead of 12.20) after have done that, i could create a matrix with "highest x value *100" columms and "highest y value*100" rows and then that i could sort my z value into that matrix (do i have to write a 0 everywhere i dont got a value?)

But somehow it feels like a "hard" workaround for something simple :/