奇怪,这不是我画的图

demo ,我修改了它以满足我的需要,让它工作,改变了它使用一个函数来绘制两个图形,但现在它根本不工作使用 plt.show() plt.savefig()

import csv
import numpy as np

import matplotlib
matplotlib.use('Agg')

import matplotlib.pyplot as plt
import matplotlib.mlab as mlab

# I converted excel to a csv file
data = [x for x in csv.reader(open('ASS1_Q1.csv'))]

question1 = {}
question1['males'] = []
question1['females'] = []
for x in data:
    if x[0].lower() == "male":
        question1["males"].append(float(x[1]))
    elif x[0].lower() == "female":
        question1['females'].append(float(x[1]))
    else:
        print "Not a valid dataline", x

def plot_graph(data, filename):

    fig = plt.figure()
    ax = fig.add_subplot(111)

    n, bins, patches = ax.hist(np.array(data), bins=13, align='mid', facecolor='#888888')

    ax.set_xlabel('Speed in kph')
    ax.set_ylabel('Amount of Females')

    ax.set_xlim(min(data, max(data)))

    # plt.savefig(filename)
    plt.show()           

plot_graph(question1['males'], "ASS1Q1-males.eps")
#plot_graph(question1['females'], "ASSQ2-females.eps")
print summary(question1['males'])
print summary(question1['females'])