在gnuplot中叠加3D图的向量dgrid3d和pm3d

问题描述：

我正在尝试在Gnuplot中绘制矢量场，将dgrid3d，pm3d和矢量叠加在一起.我可以使dgrid3d和pm3d正常工作，但是当我尝试叠加矢量时，会发生奇怪的事情.

I am trying to plot a vector field in Gnuplot superimposing dgrid3d, pm3d and vectors. I can get dgrid3d and pm3d to work but when I try to superimpose the vectors weird things happen.

我正在尝试以下操作:

set dgrid3d 50,50,2
set pm3d at b
set hidden3d
splot 'v-field.dat' u 1:2:6 w l, "" u 1:2:3:4:5:6 w vectors

数据的格式为:

0.0000000020000000 0.0833272880000000 0 0 0 1.62609277247135e-09
0.5000000020000001 0.5833272880000000 0 0 0 0.965930741599645
0.8749688835000000 0.2083182225000000 0 0 0 0.233003475483508
0.3749688835000000 0.7083182225000000 0 0 0 0.732959928249388
0.7499740065000000 0.3333133385000000 0 0 0 0.612400228894737
0.2499740065000000 0.8333133384999999 0 0 0 0.353562980611359
0.6250021815000000 0.4583253445000000 0 0 0 0.915969987957243
0.1250021814999999 0.9583253445000000 0 0 0 0.0499605601370936
0.2500301575000000 0.0833358625000000 0 0 0 0.183035467628336
0.7500301575000000 0.5833358625000000 0 0 0 0.682946534409448
0.1250311175000000 0.2083182225000000 0 0 0 0.233003477250229

对不起，如果以前有人问过我，我是gnuplot的新手.

Sorry if this has been asked before, I am new to gnuplot.

答

我猜是问题在于 set dgrid3d 和用矢量绘制是不兼容的.gnuplot可能还会尝试对向量进行插值.一种工作方式是将您插入的网格化表面绘制到一个数据块中，然后 unset dgrid3d .好吧，您的向量几乎不可见，并且当您旋转图形时，表面和基部的深度顺序仍然存在问题，而到目前为止我还无法解决.

I guess the problem is that set dgrid3d and plotting with vectors are somehow not compatible. Probably, gnuplot tries to interpolate also for the vectors. A workaroud would be to plot your interpolated gridded surface into a datablock and then unset dgrid3d. Well, your vectors are hardly visible and when you rotate the graph there is still in issue with depthorder of the surface and the base which I couldn't resolve so far.

代码:

# combining dgrid3d and vectors
reset session

$Data <<EOD
0.0000000020000000 0.0833272880000000 0 0 0 1.62609277247135e-09
0.5000000020000001 0.5833272880000000 0 0 0 0.965930741599645
0.8749688835000000 0.2083182225000000 0 0 0 0.233003475483508
0.3749688835000000 0.7083182225000000 0 0 0 0.732959928249388
0.7499740065000000 0.3333133385000000 0 0 0 0.612400228894737
0.2499740065000000 0.8333133384999999 0 0 0 0.353562980611359
0.6250021815000000 0.4583253445000000 0 0 0 0.915969987957243
0.1250021814999999 0.9583253445000000 0 0 0 0.0499605601370936
0.2500301575000000 0.0833358625000000 0 0 0 0.183035467628336
0.7500301575000000 0.5833358625000000 0 0 0 0.682946534409448
0.1250311175000000 0.2083182225000000 0 0 0 0.233003477250229
EOD

set dgrid3d 30,30,2
set pm3d at b 
set hidden3d

set table $Surface
    splot $Data u 1:2:6
unset table

unset dgrid3d

splot $Surface u 1:2:3 w l , \
      $Data u 1:2:3:4:5:6 w vectors lw 2 lc rgb "red"
### end of code

结果:

在gnuplot中叠加3D图的向量dgrid3d和pm3d

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