This code snippet processes a sequence of data (`scaled_data`) and...
This code snippet processes a sequence of data (scaled_data
) and organizes it into input-output pairs (x_data
and y_data
), often used for machine learning purposes, particularly in time series prediction.
Here's a breakdown of what the code does:
-
Iterates through the data:
The loop indexi
begins atLOOPBACK
and ends at the length ofscaled_data
. -
Extracts input data (
x_data
):
For each iteration, a slice ofscaled_data
from(i - LOOPBACK)
toi
is appended to thex_data
list. This slice represents a window of sizeLOOPBACK
of sequential past data points leading up to indexi
. -
Extracts output data (
y_data
):
For each iteration, the current data point at indexi
inscaled_data
is appended to they_data
list. This represents the target value corresponding to the input window.
Use case:
- Typically, this structure is used for creating datasets suitable for training supervised machine learning models to predict the next value in a time series.
x_data
contains sequences of past data with a length determined byLOOPBACK
.y_data
contains the actual value that follows the respective sequence inx_data
.
Example:
If scaled_data = [1, 2, 3, 4, 5, 6]
and LOOPBACK = 3
, the process works as follows:
- On the first iteration (
i = 3
),x_data.append([1, 2, 3])
andy_data.append(4)
. - On the second iteration (
i = 4
),x_data.append([2, 3, 4])
andy_data.append(5)
. - On the third iteration (
i = 5
),x_data.append([3, 4, 5])
andy_data.append(6)
.
After the loop, x_data = [[1, 2, 3], [2, 3, 4], [3, 4, 5]]
and y_data = [4, 5, 6]
.