有没有办法为gnuplot中的最后一个条目添加标签? [英] Is there a way to put a label for the last entry in gnuplot?

问题描述

我想使用gnuplot进行实时绘图(将数据附加到用于绘图的文件中，并使用replot进行实时绘图).我还想为绘制的最新条目添加标签.以便了解最新的价值.有办法吗?

I want to use gnuplot for real time plotting (Data gets appended to file which I use for plotting and I use replot for real time plotting). I also want to put a label for the latest entry which is plotted. So as to get a idea what is the latest value. Is there a way to do this?

推荐答案

如果您使用的是unixoid系统，则可以使用tail从文件中提取最后一行，并以所需的任何方式分别对其进行打印.举一个简单的例子:

If you are on a unixoid system, you can use tail to extract the last line from the file and plot it separately in whatever way you desire. To give a simple example:

plot\
"data.dat" w l,\
"< tail -n 1 data.dat" u 1:2:2 w labels notitle

这将用线绘制整个data.dat，并用标签绘制最后一个点，标签描述值.

This will plot the whole of data.dat with lines and the last point with labels, with the label depicting the value.

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