绘制3D柱状图，其数据格式为，二维数组或三维数组。

from numpy import *

file=open(“C:\Users\jyjh\Desktop\count.txt”,”r”)

arr=[]

for i in file.readlines():

temp=[]

for j in i.strip().split(” “):

temp.append(float(j))

arr.append(temp)

import random

import numpy as np

import matplotlib as mpl

import matplotlib.pyplot as plt

from mpl_toolkits.mplot3d import Axes3D

mpl.rcParams[“font.size”]=10

fig=plt.figure()

ax=fig.add_subplot(111,projection=”3d”)

xs=range(len(arr))

ys=range(len(arr[0]))

for z in range(len(arr)):

xs=range(len(arr))

ys=arr[z]

color=plt.cm.Set2(random.choice(range(plt.cm.Set2.N)))

ax.bar(xs,ys,zs=z,zdir=”y”,color=color,alpha=0.5)

ax.xaxis.set_major_locator(mpl.ticker.FixedLocator(xs))

ax.yaxis.set_major_locator(mpl.ticker.FixedLocator(ys))

ax.set_xlabel(“x”)

ax.set_ylabel(“y”)

ax.set_zlabel(“copies”)

plt.show()

通过设置xs，ys，z可以设定绘制不同维度的数据。