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我有一个交互式 perl 脚本,它使用来自 mysql 的数据通过 Chart::Gnuplot 包生成许多图。有时图形大小会因过多的图而超载。
我会选择生成仅包含图例(无图形)的 gnuplot 图像。
我不知道这是否会有所帮助,但是...
plot [0:1] [0:1] NaN title "Hello" #Just the label in the legend.
或者...
plot sin(x),NaN title "Boo" #Plots sin(x) (properly labelled) and a second label "Boo"
当然,这还是有边界之类的。您可以取消设置这些...unset border和unset tics
unset border
unset tics