3D Plot - Z Axis Out of Scale

Hans-Bernhard Broeker — Wed, 12 Dec 2018 21:21:09 -0000

The z surface plot does not configure the way you would expect.

On the contrary, it plots exactly the way I would expect it. But that's probably because I understand the commands you used better than you do ;-)

The real key here is that (at least the given subset of) the data does not actually form a z surface. Your use of 'set dgrid3d' turns it into a surface --- but not the one you actually wanted. If you really do have a surface dataset, you shouldn't need, nor use, dgrid3d on it. If you don't, you need to read more of "help dgrid3d" to understand what it does.

3D Plot - Z Axis Out of Scale

J Kelly — Wed, 12 Dec 2018 12:20:38 -0000

Hello,

I am running a simple 3D graph with x, y, z. The z surface plot does not configure the way you would expect. For example take this csv data:
rpm, Nm, time
600, -200, 0
600, -150, 0.01
600, -100, 0.02
600, -50, 0.03
600, 0, 0.04
600, 50, 0.05
600, 100, 0.06
600, 150, 0.07
600, 200, 0.08
600, 250, 0.09
600, 300, 0.1
600, 700, 10.00

When using autoscale the z plot does not plot up to the highest value of 10. Rather only to 4 as shown in the attachement. Any suggestions on what I am missing here.

I am using the following script to plot:

reset
cd 'file'
set title 'Transientness Plot'
set xlabel "RPM"
set ylabel "Nm"
set zlabel "Time (s)" rotate
set datafile separator ','
set autoscale
set zrange [0:50]
set surface
set palette
set grid
set dgrid3d
set key off
set pm3d
set zrange [0:10]
splot "transientness_data.csv" using 1:2:3 with pm3d

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