sequence_input[i, t:t + missing_len,[map_col['holiday'],map_col['weather_main'],map_col['weather_description']]] = -1
时间: 2023-11-08 13:04:26 浏览: 22
This code snippet sets the values in a specific portion of the 3-dimensional array `sequence_input` to -1.
The portion being modified is determined by the values of the `i` and `t` variables, which are used to slice the array. The `missing_len` variable is used to determine the length of the slice.
The values being modified are specified by the list `[map_col['holiday'],map_col['weather_main'],map_col['weather_description']]`, which contains the indices of three columns in the array.
By setting these values to -1, the code is likely indicating that there is missing data in these columns for the specified sequence and time step.
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sequence_input[:, :,[map_col['holiday'], map_col['weather_main'],map_col['weather_description']]] += 1
This line of code sets the values of certain columns in the sequence_input array to 1. Specifically, it sets the values in the columns corresponding to the 'holiday', 'weather_main', and 'weather_description' features to 1.
The sequence_input array is likely a multi-dimensional array that represents a dataset of some sort. The first dimension likely represents individual data points or observations, while the second dimension represents the features or variables for each observation. The third dimension is not immediately clear from this line of code, but it may represent additional information or metadata associated with each feature.
Setting the values in these columns to 1 could indicate that these features are binary or categorical in nature, where a value of 1 represents the presence of a certain condition or category. For example, the 'holiday' column may have a value of 1 for days that are holidays and 0 for all other days. Similarly, the 'weather_main' and 'weather_description' columns may have different values of 1 for different types of weather conditions.
Overall, without more context about the dataset and the purpose of this code, it is difficult to determine exactly what this line is doing or how it fits into a larger analysis pipeline.
for i in range(sequence_length, len(data)):
这段代码是使用 for 循环结合 range 函数来遍历一个列表中的元素。其中,sequence_length 是一个整数,表示要跳过列表中前 sequence_length 个元素,从第 sequence_length 个元素开始遍历。len(data) 返回列表 data 的长度,即要遍历的元素总数。
具体地,range(sequence_length, len(data)) 返回一个迭代器,它会依次生成 sequence_length, sequence_length+1, ..., len(data)-1 这些整数。因此,for 循环会遍历列表 data 中从第 sequence_length 个元素开始的所有元素,对于每一个元素,都执行循环体中的代码块。
需要注意的是,变量 i 在循环中表示当前遍历到的元素的下标,从 sequence_length 开始计数。因此,我们可以通过列表的下标操作来访问和修改列表中的元素。例如,可以使用 data[i] 来访问当前遍历到的元素。