在Python中使用savefig，名称中包含字符串和迭代索引 [英] Use savefig in Python with string and iterative index in the name

问题描述

我需要在Python中使用"savefig"来保存while循环的每次迭代的图，并且我希望我给该图赋予的名称包含文字部分和数字部分.这是从数组中得出的，或者是与迭代索引关联的数字.我举一个简单的例子:

I need to use the "savefig" in Python to save the plot of each iteration of a while loop, and I want that the name i give to the figure contains a literal part and a numerical part. This one comes out from an array or is the number associated to the index of iteration. I make a simple example:

# index.py

from numpy import *
from pylab import *
from matplotlib import *
from matplotlib.pyplot import *
import os

x=arange(0.12,60,0.12).reshape(100,5)
y=sin(x)

i=0

while i<99
  figure()
  a=x[:,i]
  b=y[:,i]
  c=a[0]
  plot(x,y,label='%s%d'%('x=',c))

  savefig(#???#)      #I want the name is: x='a[0]'.png
                      #where 'a[0]' is the value of a[0]

非常感谢.

推荐答案

好吧，应该就是这样:

savefig(str(a[0]))

这是一个玩具示例.为我工作.

This is a toy example. Works for me.

import pylab as pl
import numpy as np

# some data
x = np.arange(10)

pl.figure()
pl.plot(x)
pl.savefig('x=' + str(10) + '.png')

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