python常见包（一）之Numpy学习记录

一、基本概念和Narray对象

1、创建narray对象

numpy.empty、numpy.zeros、numpy.ones

2、数据类型对象dtype

3、数组属性

二、basic operations、

三、Indexing, Slicing and Iterating

四、universal functions

NumPy provides familiar mathematical functions such as sin, cos, and exp. In NumPy, these are called “universal functions” (ufunc).

all, any, apply_along_axis, argmax, argmin, argsort, average, bincount, ceil, clip, conj, corrcoef, cov, cross, cumprod, cumsum, diff, dot, floor, inner, invert, lexsort, max, maximum, mean, median, min, minimum, nonzero, outer, prod, re, round, sort, std, sum, trace, transpose, var, vdot, vectorize, where