希望在numpy ndarray中对数据进行简单的规范化。 特别想要X-mu/sigma。试着使用 我在前面的问题中发现了-keepinggeterror=TypeError 无法使用灵活类型执行reduce。放弃了,尝试了更简单的方法 规范化方法X-mu/X.ptp-得到了相同的错误。你知道吗
import csv
import numpy as np
from numpy import *
import urllib.request
#Import comma separated data from git.hub
url = 'http://archive.ics.uci.edu/ml/machine-learning-
databases/wine/wine.data'
urllib.request.urlretrieve(url,'F:/Python/Wine Dataset/wine_data')
#open file
filename = 'F:/Python/Wine Dataset/wine_data';
raw_data = open(filename,'rt');
#Put raw_data into a numpy.ndarray
reader = csv.reader(raw_data);
x = list(reader);
data = np.array(x)
#First column is classification, other columns are features
y= data[:,0];
X_raw = data[:,1:13];
# Attempt at normalizing data- really wanted X-mu/sigma gave up
# even this simplified version doesn't work
# latest error is TypeError cannot perform reduce with flexible type?????
X = (X_raw - X_raw.min(0)) / X_raw.ptp(0);
print(X);
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终于想明白了。“数据=np.数组(x) “返回了一个包含字符串数据的数组。你知道吗
曾经是: 数据=“np.数组(x) ““
更改为:“np.数组(x) .astype类型(np.浮动)““
在那之后一切都成功了-简单的问题花了我几个小时
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