StandardScaler
If the dataset is standardized, it will have a good optimization effect for many machine learning algorithms. To get standardized data you have to use the next formula:
Here we have the following values:
- x_scaled - standardized feature element,
- x - unnormalized feature element,
- mean - mean value,
- std - standard deviation value.
There is a function in the sklearn library that normalizes data according to the formula given above: MaxAbsScaler(). In order to work with this function, it must first be imported in such a way:
The main property of standardized data is that this data: mean = 0 and standard deviation = 1.
1from sklearn.preprocessing import StandarsScaler
This function works like the previous two, namely MinMaxScaler, MaxAbsScaler, and it works in a similar way. So, in this chapter there is no example of using StandartScaler function. You will use it on your own in the below task.
Let's try! If you have some difficulties, please, use hints.
Swipe to start coding
You have wine dataset, we have worked with it recently. Please, standardize this data. To check, if StandardScaler function works correct, please dispay the mean and standard deviation. Pay attention: mean will be equal to 0 and std to 1.
Lösning
Tack för dina kommentarer!
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If the dataset is standardized, it will have a good optimization effect for many machine learning algorithms. To get standardized data you have to use the next formula:
Here we have the following values:
- x_scaled - standardized feature element,
- x - unnormalized feature element,
- mean - mean value,
- std - standard deviation value.
There is a function in the sklearn library that normalizes data according to the formula given above: MaxAbsScaler(). In order to work with this function, it must first be imported in such a way:
The main property of standardized data is that this data: mean = 0 and standard deviation = 1.
1from sklearn.preprocessing import StandarsScaler
This function works like the previous two, namely MinMaxScaler, MaxAbsScaler, and it works in a similar way. So, in this chapter there is no example of using StandartScaler function. You will use it on your own in the below task.
Let's try! If you have some difficulties, please, use hints.
Swipe to start coding
You have wine dataset, we have worked with it recently. Please, standardize this data. To check, if StandardScaler function works correct, please dispay the mean and standard deviation. Pay attention: mean will be equal to 0 and std to 1.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanTack för dina kommentarer!
Awesome!
Completion rate improved to 12.5single
