使用gnuplot的sar csv输出图表？

Question

我有一个bash脚本来记录sar输出的cpu加载和内存使用情况，它以csv格式输出记录的统计信息。但是我如何从csv输出创建一个gnuplot图表，并且只在没有交互式命令/输入的情况下从命令行执行？

基本上，我想扩展我的bash脚本以记录sar输出，输出到csv并通过运行bash脚本创建gnuplot图表。

当前

sar cpu load csv output

Time,runq-sz,plist-sz,ldavg-1,ldavg-5,ldavg-15
02:04:36AM,0,171,0.00,0.00,0.00
02:04:37AM,0,171,0.00,0.00,0.00
02:04:38AM,0,171,0.00,0.00,0.00

sar mem csv output

Time,kbmemfree,kbmemused,%memused,kbbuffers,kbcached,kbcommit,%commit
02:11:38AM,1501736,811188,35.07,38852,101808,2628024,49.03
02:11:39AM,1501488,811436,35.08,38852,101808,2628024,49.03
02:11:40AM,1501364,811560,35.09,38852,101808,2628024,49.03

非常感谢任何建议：）

Answer 1

一种方法（也许是最简单的方法）就是使用这种语法：

#!/bin/bash
outputname="output"
gnuplot << eor
 set terminal png
 set output '$outputname.png'
 set datafile separator ","
 plot 'datafile' u 1:2, '' u 1:3 ...
 <other gnuplot commands here>
eor

正如我所示，bash变量名可以在gnuplot命令行中转义。