计算N×M(建议维度大于100*100)的0,1矩阵均匀分布程度,值由0到1表示不均匀到均匀 import numpy as np def make_rand_matrix(side=20): # 制作随机矩阵,用于测试 a = np.random.random((side,side)) for i in range(0,side): for j in range(0,side): if a[i,j]>0.3: a[i,j] = 1 else: a[i,j] = 0 return a def g
用于科学计算的 Python 发行版: 1.Anaconda https://www.continuum.io/ 公司continuum. 有商业版本. Anaconda is the leading open data science platform powered by Python. The open source version of Anaconda is a high performance distribution of Python and R and include
在统计分析中,有时候需要计算矩阵每列非0元素的个数,可以用以下方法: 先用find找到每列不为0的元素index,然后用count计数. 假设有矩阵A[M,N], 结果存在countZeros countZeros=zeros(1,N); for i=1:M countZeros(i)=length(find(A(:,i)>0); end