你能在 gnuplot 中执行一个字符串吗？

Question

在gnuplot中，有没有办法在变量中指定一个命令，比如：

command = "plot x**2 with lines"

然后稍后“执行”该命令，使用类似的东西：

exec command

Answer 1

使用eval:

echo help eval | gnuplot

 The `evaluate` command executes the commands given as an argument string.
 Newline characters are not allowed within the string.

 Syntax:
       eval <string expression>

 This is especially useful for a repetition of similar commands.

 Example:
       set_label(x, y, text) \
         = sprintf("set label '%s' at %f, %f point pt 5", text, x, y)
       eval set_label(1., 1., 'one/one')
       eval set_label(2., 1., 'two/one')
       eval set_label(1., 2., 'one/two')

 Please see `substitution macros` for another way to execute commands
 from a string.

你能在 gnuplot 中执行一个字符串吗？

Can you exec a string in gnuplot?

gnuplot