what is this means dummies.astype(int)
时间: 2024-05-18 17:17:16 浏览: 8
`dummies.astype(int)` is a NumPy method that converts the data type of an array to another data type. In this case, the `dummies` array is converted to an integer data type.
The reason for doing this is because the `dummies` array is initially created with a data type of `float`. However, since the array contains only 0s and 1s, it makes more sense to represent these values as integers rather than floats.
By using the `astype(int)` method, we convert the `dummies` array from a `float` array to an `int` array, which reduces the memory usage and makes it easier to work with the array in some cases.
相关问题
df_dummies.head()什么意思
"df_dummies.head()" 是一个 Pandas DataFrame 对象的方法,用于显示 DataFrame 的前几行。其中,“df_dummies” 是 DataFrame 的名称,".head()" 是方法名。默认情况下,该方法返回前五行,但也可以指定要返回的行数,例如 "df_dummies.head(10)" 返回前十行。
def load_cnn_train(): data = pd.dataest_csv(dataset_path) pixels = data['pixels'].tolist() width, height = 48, 48 faces = [] for pixel_sequence in pixels: face = [int(pixel) for pixel in pixel_sequence.split(' ')] face = np.asarray(face).reshape(width, height) face = cv2.resize(face.astype('uint8'),image_size) faces.append(face.astype('float32')) faces = np.asarray(faces) faces = np.expand_dims(faces, -1) emotions = pd.get_dummies(data['emotion']).as_matrix() return faces, emotions
这是一个用于加载CNN训练数据的函数。它的功能是从给定的数据集路径中读取数据,对每个像素序列进行处理,并将结果存储在一个列表中。然后,它将每张脸的大小调整为指定的宽度和高度,并将结果转换为浮点数类型。最后,它将脸部数据和情绪标签转换为NumPy数组,并返回这两个数组。
请注意,这段代码中使用的一些函数和库需要提前导入,比如`pandas`和`numpy`库以及`cv2`模块。另外,`image_size`变量的值需要在代码中定义。如果您有任何进一步的问题,请随时提问。