Python output numpy array to csv

1 Function Detailsnumpy.savetxt

store the array in a text file

numpy.savetxt(fname, X, fmt='%.18e', delimiter=' ', newline='\n', 
header='', footer='', comments='# ', encoding=None)
***参数***
# fname：文件名
# X：1维或者2维数组
# delimiter：用于分割列的字符/字符串
# newline：于分割行的字符/字符串
# header：写入开头的字符串
# footer：写入结尾的字符串
# comments：将在页眉和页脚字符串前加前缀的字符串，以将它们标记为注释。默认值：“#”
# encoding：用于对输出文件进行编码的编码
# fmt：字符串输出格式
# %[flag]width[.precision]specifier

Detailed explanation of fmt format
%[flag]width[.precision]specifier

• flags:
  
• width:
  
• precision:
  
• specifiers:
  

2 Save numpy array as csv file

Precautions:

1. The file extension is csv
2. delimiter is set to ","

import numpy as np
np.savetxt('test.csv',data,delimiter=",")

Learning link:

• official link
• How to save numpy array as .csv file