This is a nice video about concept of ridge regression and principle components:
https://www.youtube.com/embed/onwOXVv8sks?rel=0
+ نوشته شده در یکشنبه بیست و سوم مهر ۱۳۹۶ساعت 11:1  توسط vitru |
Ridge regression
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Training and Test Error as A Function of Model Complexity
Fit of a model improves with the complexity of the model, i.e. as more predictors are included in the model the R2 value is expected to improve. If predictors truly capture the mادامه مطلب
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نویسنده: محمد یزدانی
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نویسنده: محمد یزدانی
However, similar biases can occur when your linear model is missing important predictors, polynomial terms, and interaction terms. Statisticians call this specification bias, and it is caused by an underspecified model.
+ نوشته شده در سه شنبه بیست و پنجم مهر ۱۳۹۶ساعت 13:17  توسط vitru |
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نویسنده: محمد یزدانی
Accuracy and ExplainabilityModel performance is estimated in terms of its accuracy to predict the occurrence of an event on unseen data. A more accurate model is seen as a more valuable model.
Model interpretability provides insight into the relationادامه مطلب
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نویسنده: محمد یزدانی
https://www.youtube.com/watch?v=azXCzI57Yfc
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نویسنده: محمد یزدانی
creating a vector:
c(1, 2,3)
this is a vecotr include 1,2,3
c('a','b')
this is a vector includes a and b
seq(5,9)
creates sequence of data from 5 to 9
5:9
is like the above code
seq( 5, 9, 0.5) create a vector from 5 to 9 with .5 interval
+ نوشته شده در دوشنبه بیست و چهارم مهر ۱۳۹۶ساعت 13:38 توسط vitru
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نویسنده: محمد یزدانی
However, similar biases can occur when your linear model is missing important predictors, polynomial terms, and interaction terms. Statisticians call this specification bias, and it is caused by an underspecified model.
+ نوشته شده در سه شنبه بیست و پنجم مهر ۱۳۹۶ساعت 13:17 توسط vitru
|
برچسب:
نویسنده: محمد یزدانی
Training and Test Error as A Function of Model Complexity
Fit of a model improves with the complexity of the model, i.e. as more predictors are included in the model the R2 value is expected to improve. If predictors truly capture the main feادامه مطلب
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نویسنده: محمد یزدانی
E[MSE] = σ2 + (Model Bias)2 + Model Variance
The first term, σ2, is the irreducible error and caot be eliminated by modeling. The second term is the squared bias of the model. This reflects how close the functional form of the model is to the
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نویسنده: محمد یزدانی
This is a nice video about concept of ridge regression and principle components:
https://www.youtube.com/embed/onwOXVv8sks?rel=0
برچسب:
نویسنده: محمد یزدانی