Addmana的专栏

使用 清华的镜像快很多 conda config –add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/ conda config –set show_channel_urls yes

theano安装的问题

On some systems, waitKey() may return a value that encodes more than just the ASCII keycode. (A bug is known to occur on Linux when OpenCV uses GTK as its backend GUI library.) On all systems, we can

求多维张量（矩阵）所有元素之和。import numpy as npY = np.random.randn(3,4,5)sum_matrix = np.sum(np.reshape(Y,(Y.size,)))技巧就是把Y变为一维向量。

# numpy.power(x1,x2)numpy.power(1,-1)这样做是不允许的，只需把x1 = float(x1)就行

如果matrix 是二维，numpy tile 和 matlab repmat表现一样。 如果是三维张量，那么需要 gg = temp_gg[:,:,np.newaxis] np.tile(gg, (1,1,dimY[n]))改。

from matplotlib import pyplot import scipy as sp import numpy as np from matplotlib import pylab from pandas import Series, DataFrameimport pandas as pdfilename = 'data.txt'data = pd.read_cs

来自https://www.cnblogs.com/bqx619/p/5021458.htmlsudo apt-get remove vsftpd sudo rm /etc/pam.d/vsftpd sudo apt-get install vsftpd 这是因为ubuntu启用了PAM,所在用到vsftp时需要用到 /etc/pam.d/vsftpd 这个文件（默认源码安装的不会有这个文件）