October 2021
Intermediate to advanced
289 pages
8h 31m
Chinese
Content preview from 数据科学中的实用统计学(第2版)
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wt <- ifelse(full_train_set$outcome=='default',
1 / mean(full_train_set$outcome == 'default'), 1)
full_model <- glm(outcome ~ payment_inc_ratio + purpose_ + home_ +
emp_len_+ dti + revol_bal + revol_util,
data=full_train_set, weight=wt, family='quasibinomial')
pred <- predict(full_model)
mean(pred > 0)
[1] 0.5767208
多数
scikit-learn
方法可以在
fit
函数中使用关键字参数
sample_weight
来指定权重：
default_wt = 1 / np.mean(full_train_set.outcome == 'default')
wt = [default_wt if outcome == 'default' else 1
for outcome in full_train_set.outcome]
full_model = LogisticRegression(penalty="l2", C=1e42, solver='liblinear')
full_model.fit(X, y, sample_weight=wt)
print('percentage ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.