python3绘图示例3（基于matplotlib：折线图等）

#!/usr/bin/env python# -*- coding:utf-8 -*-from pylab import *from numpy import *import numpy

# 数据点图-数据点平滑处理def moveing_average(ineterval,window_size):    window=ones(int(window_size))/float(window_size)    return convolve(ineterval,window,‘same‘)

t=linspace(-4,4,100)y=sign(t)+randn(len(t))*0.1plot(t,y,‘k.‘)

y_av=moveing_average(y,10)plot(t,y_av,‘r‘)

xlabel(‘time‘)ylabel(‘value‘)grid(True)show()

# 图2-一个为曲线图 一个为折线图windows=[‘flat‘,‘hanning‘,‘hamming‘,‘bartlett‘,‘blackman‘]

def smooth(x,window_len=11,window=‘hanning‘):    if x.ndim!=1:        print(‘ere‘)

if x.size<window_len:        print(‘ee2‘)

if window_len<3:        return x

if not window  in windows:        print(‘4‘)

s=numpy.r_[x[window_len-1:0:-1],x,x[-1:-window_len:-1]]

if window==‘flat‘:        w=numpy.ones(window_len,‘d‘)    else:        w=eval(‘numpy.‘+window+‘(window_len)‘)        y=numpy.convolve(w/w.sum(),s,mode=‘valid‘)    return y

t=linspace(-4,4,100)x=sign(t)xn=x+randn(len(t))*0.1

y=smooth(x)

ws=31subplot(211)plot(ones(ws))

for w in windows[1:]:    eval(‘plot(‘+w+‘(ws))‘)    axis([0,30,0,1.1])    legend(windows)    title(‘smoothing‘)

subplot(212)plot(x)plot(xn)for w in windows[1:]:    plot(smooth(xn,10,w))I=[‘original ‘,‘noise‘]I.extend(windows)legend(I)

title(‘signal‘)show()

原文地址：https://www.cnblogs.com/NiceTime/p/10125218.html