Question

我正在尝试使用python脚本基于行号划分数据并调用Gnuplot来绘制直方图。但是，出于某种原因，我在运行脚本后没有得到任何输出。有人可以帮我理解我做错了什么吗？谢谢！

我的剧本：

#!/usr/bin/env python
import os
import subprocess
with open("gpu Latency sample 1.txt", "r") as f:
        for lineno, line in enumerate(f, start=1):
                if ( lineno % 2 == 0) :
                        #odd_file = open("odd_file.txt", 'a')
                        with open("even.txt", "a") as even_file:
                            even_file.write(line)
                else :
                        with open("odd.txt", "a") as odd_file:
                            odd_file.write(line)
p = subprocess.Popen(['gnuplot'], shell = True,stdin=subprocess.PIPE )
filename1= open("even.txt","r")
filename2= open("odd.txt","r")
p.stdin.write("set xtics nomirror rotate by -45")
p.stdin.write("set key noenhanced")
p.stdin.write("set style data linespoints")
p.stdin.write("binwidth=1000")
p.stdin.write("bin(x, width)=width*floor(x/width) + binwidth/2.0")
p.stdin.write("plot \"%s\" using (bin((\$1+\$2),binwidth)): (1.0) smooth freq with lines, \"%s\" using (bin((\$1+\$2),binwidth)): (1.0) smooth freq with lines" %(filename1, filename2))
p.stdin.write("pause -1")

Answer 1

你正在写gnuplot的stdin，但是你没有向它发送任何换行符（\n）：所有你的gnuplot命令都在一行中被squesting quashhed，之后甚至没有空格。

尝试在上面的"\n"个来电结束时添加write字符。

从Python调用Gnuplot

1 个答案: