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我试图创建一个三维表面图，看起来像这样： 
gnuplot的 - 三维曲面图
而是绘制方程，我试图绘制我自己的一套包含在data.tsv数据文件采用推荐的网格格式。
8417 5128 4661
7284 4940 3373
5220 3597 4088
为了清楚起见，上面的数据的XYZ表示为：
rec/s mb/s latency
640000 1024 5220
640000 2048 3597
640000 4096 4088
320000 1024 7284
320000 2048 4940
320000 4096 3373
160000 1024 8417
160000 2048 5128
160000 4096 4661
，我使用以获得所需的输出的gnuplot的脚本是：
set term postscript eps enhanced color
set output '|ps2pdf - outputfile.pdf'
set bar 1.000000 front
set style circle radius graph 0.02, first 0.00000, 0.00000
set style ellipse size graph 0.05, 0.03, first 0.00000 angle 0 units xy
set style textbox transparent margins 1.0, 1.0 border
unset logscale
set samples 51, 51
set isosamples 21, 21
set style data lines
unset paxis 1 tics
unset paxis 2 tics
unset paxis 3 tics
unset paxis 4 tics
unset paxis 5 tics
unset paxis 6 tics
unset paxis 7 tics
set title "3D gnuplot demo"
set xlabel "X axis"
set xlabel offset character -3, -2, 0 font "" textcolor lt -1 norotate
set xrange [ 160000 : 640000 ] noreverse nowriteback
set ylabel "Y axis"
set ylabel offset character 3, -2, 0 font "" textcolor lt -1 rotate by -270
set yrange [ 1024 : 4096 ] noreverse nowriteback
set zlabel "Z axis"
set zlabel offset character -5, 0, 0 font "" textcolor lt -1 norotate
set paxis 1 range [ * : * ] noreverse nowriteback
set paxis 2 range [ * : * ] noreverse nowriteback
set paxis 3 range [ * : * ] noreverse nowriteback
set paxis 4 range [ * : * ] noreverse nowriteback
set paxis 5 range [ * : * ] noreverse nowriteback
set paxis 6 range [ * : * ] noreverse nowriteback
set paxis 7 range [ * : * ] noreverse nowriteback
set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 front noinvert bdefault
x = 0.0
# Last datafile plotted: "$grid"
splot 'data.tsv' using 1:2:3
然而，上面的脚本给我以下错误：
"3d.gp", line 37: warning: No usable data in this plot to auto-scale axis range
splot 'data.tsv' using 1:2:3
^
"3d.gp", line 37: All points z value undefined