依赖的包：

1.xlrd

2.matplot

3.numpy

读取excel文件并绘制图表

代码如下：

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1. import matplotlib.pyplot as plt

2. import numpy as np

3. import xlrd

4. import os

5. from StringIO import StringIO

6. if __name__ == '__main__':

7. data = xlrd.open_workbook('D:\\tt.xls')

8. plt.figure(figsize=(8,4))

9. plt.xlabel(u'second')

10. plt.ylabel(u'xxx')

11. x_index=1

12. data.sheet_names()

13. table = data.sheets()[0]

14. table = data.sheet_by_index(0)

15. table = data.sheet_by_name(u'Sheet1')

16. print("Good")

17. COLOR_INDEX=1

18. INDEX_NAME=''

19. ## init data

20. nrows = table.nrows

21. ncols = table.ncols

22. print("nr=%d nc=%d \n"%(nrows,ncols))

23. '''

24. for rownum in range(table.nrows):

25. value = table.cell(rownum,2).value

26. if rownum == 0:

27. print("")

28. else:

29. try:

30. value_int = int(value)

31. x.append(x_index)

32. y.append(value_int)

33. # line = ax.plot(x_index,value_int,label="xx ",color="red",linewidth=2)

34. #plt.plot(x_index,value_int,label="xx ",color="red",linewidth=2)

35. print("index=%d"%x_index)

36. #plt.plot_date(x_index,value_int)

37. x_index=x_index+1

38. except:

39. print("error")

40. plt.plot(x,y,label="xx ",color="red",linewidth=2)

41. '''

42. for colnum in range(table.ncols):

43. x=[]

44. y=[]

45. for rownum in range(table.nrows):

46. value = table.cell(rownum,colnum).value

47. #print("nr=%d nc=%d value=%d \n"%(rownum,colnum,value ))

48. #print(value)

49. #print("rownum=%d colnum=%d "%(rownum,colnum))

50. if rownum == 0:

51. print("")

52. else:

53. try:

54. value_int = int(value)

55. x.append(x_index)

56. y.append(value_int)

57. #plt.plot(x_index,value_int,label=" ",color="red",linewidth=2)

58. #print("index=%d"%x_index)

59. #plt.plot_date(x_index,value_int)

60. x_index=x_index+1

61. except:

62. print("error")

63. if COLOR_INDEX == 1:

64. COLOR_INDEX = 0

65. plt.plot(x,y,color="red",linewidth=2)

66. else:

67. COLOR_INDEX =1

68. plt.plot(x,y,color="blue",linewidth=2)

69. print("==============================>")

70. plt.title("Test")

71. #plt.ylim(10,2000)

72. plt.legend()

73. plt.show()

74. pass

本文转自 chengxuyonghu 51CTO博客，原文链接：http://blog.51cto.com/6226001001/1576059，如需转载请自行联系原作者