User ihadanny

75 votes

4 answers

163k views

What is the proper usage of scale_pos_weight in xgboost for imbalanced datasets?

asked Oct 30, 2016 at 13:59

25 votes

4 answers

116k views

Why is P(A,B|C)/P(B|C) = P(A|B,C)?

asked Jan 26, 2017 at 22:13

21 votes

1 answer

10k views

Can you give a simple intuitive explanation of IRLS method to find the MLE of a GLM?

asked Sep 24, 2016 at 7:59

15 votes

1 answer

32k views

t.test returns an error "data are essentially constant"

asked Aug 23, 2014 at 5:33

13 votes

2 answers

12k views

Fisher's score function has mean zero - what does that even mean?

asked Aug 6, 2016 at 21:03

9 votes

2 answers

1k views

Why is the variable importance metric suggested by Breiman specific only to random forests?

asked Sep 15, 2015 at 20:33

9 votes

2 answers

5k views

Can you give an intuition behind the FTRL update step?

asked Feb 4, 2016 at 9:58

8 votes

1 answer

3k views

can you explicitly show me the first iteration of newton-raphson and fisher scoring?

asked Sep 23, 2016 at 20:20

7 votes

1 answer

141 views

need intuition: why is there no winning strategy to this game?

asked Mar 26, 2017 at 17:33

7 votes

1 answer

3k views

What's the role of the commitment loss in VQ-VAE?

asked Nov 8, 2022 at 14:14

6 votes

1 answer

705 views

Feature importance for xgboost classification of a sample

asked Jan 4, 2017 at 10:11

5 votes

1 answer

448 views

Should I avoid mixed ARMA models?

asked Sep 27, 2019 at 16:02

5 votes

1 answer

151 views

Can we do hypothesis testing for OLS estimator without assuming normality for the errors?

asked Oct 22, 2016 at 18:19

5 votes

2 answers

515 views

Why is it that when the score variance gets LARGER we get MORE confident about the MLE estimate?

asked Sep 9, 2016 at 12:11

4 votes

1 answer

206 views

In GLM do we try to model E(T(y)) or E(y)?

asked Aug 5, 2016 at 22:01

4 votes

1 answer

3k views

Is it necessary to use warm_start when tracking oob_score in scikit RandomForestClassifier?

asked Mar 20, 2016 at 11:12

4 votes

0 answers

270 views

when fitting a regression model to a time-series, can I use lagged values of the time-series itself?

asked Nov 13, 2019 at 12:46

4 votes

2 answers

518 views

using the test population as an eval_set when doing hyperparameter optimization

asked Jan 23, 2020 at 11:27

4 votes

1 answer

555 views

Latent variable model: why is the marginal probability of data under the model intractable?

asked Oct 1, 2022 at 15:14

3 votes

0 answers

35 views

Why are these 2 ARIMA formulations equivalent?

asked Oct 31, 2019 at 20:39

3 votes

1 answer

1k views

VQ-VAE objective - is it ELBO maximization, or minimization of the KL-divergence between the posterior and its approximation?

asked Oct 19, 2022 at 18:34

3 votes

1 answer

1k views

time series forecasting - predicting the next 24 hours

asked Oct 3, 2019 at 5:42

3 votes

1 answer

562 views

Need intuition - how do they simplify the Q function for gaussian mixture EM?

asked Mar 3, 2017 at 16:01

2 votes

1 answer

1k views

baum-welch parameter estimation numeric example

asked Mar 3, 2017 at 15:23

2 votes

2 answers

256 views

uniform distribution: expectation of sum squared observations

asked Nov 4, 2016 at 21:05

2 votes

0 answers

608 views

LIME - local linear explanations for global black-box models work for LogisticRegression but not for RandomForest?

asked Apr 27, 2017 at 11:25

2 votes

2 answers

472 views

autocovariance for a strict stationary stochastic process

asked Aug 10, 2019 at 7:35

2 votes

1 answer

950 views

Why does the Yule-Walker equation for AR(1) only hold for $k \ge 1$?

asked Aug 24, 2019 at 14:39

2 votes

1 answer

152 views

When developing the Yule-Walker equations, why can we assume $E(X_{t-k} \cdot Z_t) = 0$

asked Aug 24, 2019 at 14:44

2 votes

0 answers

343 views

Interpreting random survival forest mortality

asked Jul 13, 2016 at 18:34

Stack Exchange Network

62 Questions

What is the proper usage of scale_pos_weight in xgboost for imbalanced datasets?

Why is P(A,B|C)/P(B|C) = P(A|B,C)?

Can you give a simple intuitive explanation of IRLS method to find the MLE of a GLM?

t.test returns an error "data are essentially constant"

Fisher's score function has mean zero - what does that even mean?

Why is the variable importance metric suggested by Breiman specific only to random forests?

Can you give an intuition behind the FTRL update step?

can you explicitly show me the first iteration of newton-raphson and fisher scoring?

need intuition: why is there no winning strategy to this game?

What's the role of the commitment loss in VQ-VAE?

Feature importance for xgboost classification of a sample

Should I avoid mixed ARMA models?

Can we do hypothesis testing for OLS estimator without assuming normality for the errors?

Why is it that when the score variance gets LARGER we get MORE confident about the MLE estimate?

In GLM do we try to model E(T(y)) or E(y)?

Is it necessary to use warm_start when tracking oob_score in scikit RandomForestClassifier?

when fitting a regression model to a time-series, can I use lagged values of the time-series itself?

using the test population as an eval_set when doing hyperparameter optimization

Latent variable model: why is the marginal probability of data under the model intractable?

Why are these 2 ARIMA formulations equivalent?

VQ-VAE objective - is it ELBO maximization, or minimization of the KL-divergence between the posterior and its approximation?

time series forecasting - predicting the next 24 hours

Need intuition - how do they simplify the Q function for gaussian mixture EM?

baum-welch parameter estimation numeric example

uniform distribution: expectation of sum squared observations

LIME - local linear explanations for global black-box models work for LogisticRegression but not for RandomForest?

autocovariance for a strict stationary stochastic process

Why does the Yule-Walker equation for AR(1) only hold for $k \ge 1$?

When developing the Yule-Walker equations, why can we assume $E(X_{t-k} \cdot Z_t) = 0$

Interpreting random survival forest mortality