Python 入门练习--读取数据，并将某几列的数据赋值给变量
There are many commands that can load data into Python. Here I use genfromtxt and loadtxt as example.
1 import numpy as np 2 my_data = np.genfromtxt('name_of_the_data', skip_header=10) # skip the first 10 rows of the data, and the true data is loaded from line 11
or
1 import numpy as np 2 my_data = np.loadtxt('before.dump',skiprows=10) # skip the first 10 rows of the data, and the true data is loaded from line 11
1 x = my_data[:,3] # extract x from data, assign data we need to x 2 y = my_data[:,4] # the colon represents all values. [:,4] means all the values of column 5 3 z = my_data[:,8] # [3,:] means all the values of row 4
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1 # Get help of these two commands 2 help(np.loadtxt) 3 help(np.genfromtxt)
