UCI-HAR数据集的处理

import numpy as np
import pandas as pd
from collections import Counter


DATASET_PATH = "./UCI_data/raw/UCI HAR Dataset/"

INPUT_SIGNAL_TYPES = [ #文件前半部分公共名
    "body_acc_x_",
    "body_acc_y_",
    "body_acc_z_",
    "body_gyro_x_",
    "body_gyro_y_",
    "body_gyro_z_",
    "total_acc_x_",
    "total_acc_y_",
    "total_acc_z_"
]

def load_x(X_signals_paths):
    X_signals = []

    for signal_type_path in X_signals_paths:#外面的for是赋文件路径然后分别进行内for操作
        with open(signal_type_path, "r") as f:#里面的for就是 从打开的文件中加载行 然后对加载的行作两空格‘  ’代替1空格‘ ’的操作 然后删除头尾空白 然后通过单空格分离数据
            X_signals.append(                      #将分离的数据组成新的list  最后serie从list中取数据组成数组
                [np.array(serie, dtype=np.float32)  #创建一个serie数组
                 for serie in [row.replace(' ', ' ').strip().split(' ') for row in f]]
            )      #从打开的文件中加载行 然后对加载的行作两空格‘  ’代替1空格‘ ’的操作 然后删除头尾空白 然后通过单空格分离数据
                   #将分离的数据放进X_signals

            #print(np.array(X_signals).shape) #(1,7352,128) (特征数,样本个数,时间步长)

    return np.transpose(X_signals, (1, 2, 0))   #0轴是第一个方括号代表序号 1轴是第二个方括号代表样本量 2轴是第二个方括号代表序列数据采样量
            #（样本个数，时间步长，特征数）         #然后transpose由0,1,2换成了换成样本量，采样量，序号  1，2，0


def load_y(y_path):
    # Read dataset from disk, dealing with text file's syntax
    with open(y_path, "r") as f:
        y = np.array(
            [elem for elem in [row.replace(' ', ' ').strip().split(' ') for row in f]],
            dtype=np.int32
        )

    y = y.reshape(-1, )
    # Substract 1 to each output class for friendly 0-based indexing
    return y - 1    #y从1开始的

#数据文件的路径
train_x_signals_paths = [
    DATASET_PATH + "train/Inertial Signals/" + signal + "train.txt" for signal in INPUT_SIGNAL_TYPES
]       #用signal遍历train 9个文件名
test_x_signals_paths = [
    DATASET_PATH + "test/Inertial Signals/" + signal + "test.txt" for signal in INPUT_SIGNAL_TYPES
]
#标签路径
train_y_path = DATASET_PATH + "train/y_train.txt"
test_y_path = DATASET_PATH + "test/y_test.txt"

#数据处理
train_x = load_x(train_x_signals_paths) #对9个文件名做load操作,做完一个操作后train_x是三维的
test_x = load_x(test_x_signals_paths)

#print(train_x_signals_paths)
# print("train_x.shape", train_x.shape)
#print("test_x.shape", test_x.shape)

#标签处理
train_y = load_y(train_y_path)
test_y = load_y(test_y_path)

# train_y_matrix = np.asarray(pd.get_dummies(train_y), dtype=np.int8) #先进行one-hot编码
# test_y_matrix = np.asarray(pd.get_dummies(test_y), dtype=np.int8) #然后转换成一数组
                                                                    #这里就没用one hot
#print(train_y, Counter(train_y))
#print(test_y, Counter(test_y))

#print(train_y_matrix)

np.save("./UCI_data/np/x_train.npy", train_x)
np.save("./UCI_data/np/y_train.npy", train_y)
np.save("./UCI_data/np/x_test.npy", test_x)
np.save("./UCI_data/np/y_test.npy", test_y)