如何將數字與我的列表中的科學記數法表示的每個元素相乘？

Question

我有一個data.txt中爲：

1.30000E+01 7.49106E+01 

1.40000E+01 7.24673E+01 

...

我要乘以2的第一列這裏是我的代碼：

with open("data.txt") as f: 
data = f.readlines() 

xtemp = [row.split()[0] for row in data] 
y = [row.split()[1] for row in data] 
x = [i * 2 for i in xtemp] 

錯誤信息

eError: invalid literal for float():1.30000E+011.30000E+01

Answer 1

從a讀取的數據文件的類型是字符串。你需要轉換爲浮動繁殖：

x = [float(i) * 2 for i in xtemp] 

---

import io 

filedata = """1.30000E+01 7.49106E+01 
1.40000E+01 7.24673E+01""" 

data = [i.strip("\n") for i in io.StringIO(filedata).readlines()] 

xtemp = [row.split()[0] for row in data] 
y = [row.split()[1] for row in data] 
xtype = [type(i) for i in xtemp] # [str,str] <-- here is your problem 
x = [float(i) * 2 for i in xtemp] 


x 

返回你的輸入線

[26.0, 28.0]