[Gnuplot-info] Contour graph: how add points and clip

[robertom <rob...@un...>]

Hi,

I'd like to obtain with gnuplot a graph like this:

http://old.nabble.com/file/p29553317/moz-screenshot.jpeg 

using  a 3D dataset like that shown by the red points.


Now I obtain a contour graph with the following option:

set pm3d interpolate 8,8
set dgrid3d 8,45,20
set palette maxcolors 100
set view map
splot "KH.dat" using 1:2:3 with pm3d;

I have two question:

    * A) How can I add the real points (not the grid!!) on the graph?
because if I use this option (splot "KH.dat" using 1:2:3 with pm3d,\
"KH.dat"    using 1:2:3 w points palette ps 1 pt 4;) I draw the grid points
on the contour graph, but not the real points...
    * If possible, how can I clip the grid3d? I'd like to obtain a contour
graph only when I have the real data (see the figure1) and not "extrapolate"
anything. 


Thanks for the attention!

Roberto


Here attached, a  3d example dataset:

 # x 	z 	Density of current[Re]
45 	-15 	-3.182
60 	-15 	-19.381
75 	-15 	43.782
90 	-15 	22.177
105 	-15 	-31.759
120 	-15 	7.625
135 	-15 	-22.805
150 	-15 	-42.79
165 	-15 	38.199
180 	-15 	52.525
195 	-15 	60.093
210 	-15 	21.255
225 	-15 	-27.971
240 	-15 	23.938
255 	-15 	-74.669
270 	-15 	-98.24
285 	-15 	-9.867
300 	-15 	17.152
315 	-15 	30.979
330 	-15 	7.646
345 	-15 	18.718
360 	-15 	7.106
375 	-15 	17.715
390 	-15 	-0.75
405 	-15 	-2.039
420 	-15 	-8.993
435 	-15 	-25.078
90 	-30 	15.666
105 	-30 	37.538
120 	-30 	-40.039
135 	-30 	-38.69
150 	-30 	12.286
165 	-30 	23.028
180 	-30 	70.035
195 	-30 	52.557
210 	-30 	30.41
225 	-30 	31.778
240 	-30 	-76.756
255 	-30 	-63.216
270 	-30 	-67.121
285 	-30 	-67.721
300 	-30 	16.801
315 	-30 	35.805
330 	-30 	30.623
345 	-30 	-5.963
360 	-30 	22.293
375 	-30 	20.595
390 	-30 	25.933
135 	-45 	-31.461
150 	-45 	6.237
165 	-45 	48.476
180 	-45 	23.709
195 	-45 	71.678
210 	-45 	97.939
225 	-45 	-30.632
240 	-45 	-66.418
255 	-45 	-92.299
270 	-45 	-42.569
285 	-45 	-34.905
300 	-45 	-55.369
315 	-45 	31.355
330 	-45 	44.209
345 	-45 	56.547
180 	-60 	42.678
195 	-60 	48.503
210 	-60 	8.012
225 	-60 	-4.586
240 	-60 	-32.172
255 	-60 	-30.978
270 	-60 	-74.704
285 	-60 	-38.047
300 	-60 	-29.84
225 	-75 	-14.471
240 	-75 	31.208
255 	-75 	-0.483



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