来自 header 评论的 gnuplot 自动标题矩阵

Question

如果我有带有 header 注释的矩阵数据，我可以将其用作标题吗？数据类似于：

# Information on my plot, the time (t=2.0), for example
1 2 3 4
5 6 7 8
9 0 9 8
7 6 5 4

我试过set key autotitle columheader尝试使用整个注释行作为标题，但没有打印标题。

此外，对于同一文件中的多个数据集，如何实现这一点？

Answer 1

是的。来自文档（在 "help index" 下）

`index '<name>'` selects the data set with name '<name>'.  Names are assigned
 to data sets in comment lines.  The comment character and leading white space
 are removed from the comment line.  If the resulting line starts with <name>,
 the following data set is now named <name> and can be selected.

 Example:
       plot 'file' index 'Population'

 Please note that every comment that starts with <name> will name the following
 data set.  To avoid problems it may be useful to choose a naming scheme like
 '== Population ==' or '[Population]'.

这是一个演示

$DATA << EOD
# Ones
0 1
1 0


#Twos
0 2
2 0


#Threes
0 3
3 0
EOD

set view 77, 330
set ztics 1
set hidden3d nooffset
set key box

splot for [name in "Ones Threes Twos"] \
      $DATA index name matrix with lines lw 3 title name

来自 header 评论的 gnuplot 自动标题矩阵

gnuplot autotitle matrix from header comment

gnuplot