User jjepsuomi

187 votes

10 answers

126k views

Bottom to top explanation of the Mahalanobis distance?

asked Jun 19, 2013 at 12:41

120 votes

2 answers

302k views

Why do we need to normalize data before principal component analysis (PCA)? [duplicate]

asked Sep 4, 2013 at 8:12

33 votes

5 answers

56k views

When should I apply feature scaling for my data [duplicate]

asked Oct 29, 2014 at 9:00

27 votes

2 answers

30k views

What is the intuition of invertible process in time series?

asked Feb 23, 2013 at 11:50

18 votes

3 answers

12k views

Book recommendations for beginners about probability distributions

asked Jul 2, 2013 at 6:58

17 votes

1 answer

10k views

Question about sample autocovariance function

asked Apr 16, 2013 at 10:11

14 votes

4 answers

29k views

Understanding the blue dotted lines in an ACF from R

asked Feb 8, 2013 at 9:58

14 votes

2 answers

3k views

Intuition behind the t-distributions density function

asked Dec 3, 2013 at 7:00

13 votes

2 answers

51k views

How to interpret autocorrelation of residuals and what to do with it?

asked Apr 10, 2013 at 6:14

11 votes

1 answer

8k views

Example of maximum a posteriori estimation

asked Jul 23, 2013 at 6:23

9 votes

4 answers

1k views

Comparing model evaluations of machine learning and statistics

asked Nov 5, 2021 at 14:10

7 votes

2 answers

3k views

What if Markov chain does not converge in a reasonable amount of time?

asked Dec 19, 2017 at 12:26

7 votes

1 answer

7k views

How to handle data normalization in kNN when new test data is received

asked Feb 4, 2015 at 12:13

6 votes

2 answers

3k views

Interpreting 3D scatter plot

asked Sep 20, 2013 at 7:18

5 votes

1 answer

670 views

Help understanding an explanation about minimum description length principle

asked Oct 1, 2013 at 10:34

5 votes

1 answer

3k views

How to deal with mixture of continuous and discrete features when using Naive Bayes classifier

asked Feb 6, 2015 at 12:57

5 votes

1 answer

25k views

Step-by-step example of predicting time series with ARIMAX or ARMAX model?

asked Apr 8, 2013 at 10:11

5 votes

2 answers

6k views

What is meant by effective parameters in machine learning

asked Sep 5, 2014 at 11:54

4 votes

4 answers

7k views

How to deal with unbalanced data

asked Jun 25, 2014 at 10:31

4 votes

1 answer

5k views

Confusion about error term in ARMA-model when predicting future values

asked Apr 10, 2013 at 10:55

4 votes

2 answers

414 views

Help with understanding stationarity

asked Mar 27, 2013 at 17:30

4 votes

2 answers

1k views

How to decide what to do with missing data when doing data analysis?

asked Jan 10, 2013 at 10:40

4 votes

2 answers

11k views

Help interpreting ACF- and PACF-plots

asked Apr 22, 2013 at 7:13

4 votes

2 answers

3k views

How do you sample data from a known distribution?

asked Dec 10, 2015 at 12:17

4 votes

1 answer

222 views

Understanding Dempster et al. on expectation maximization

asked Nov 28, 2013 at 11:02

3 votes

1 answer

601 views

Kernel density estimator function explanation needed

asked May 7, 2014 at 7:38

3 votes

2 answers

2k views

How does one visualize the self-organizing map of $n$-dimensional data

asked May 2, 2016 at 13:40

3 votes

1 answer

423 views

Is normalization required in Sammon mapping

asked May 16, 2016 at 9:37

3 votes

1 answer

919 views

How can permutation test be used for assessing the prediction capability of a model?

asked Feb 11, 2015 at 9:21

3 votes

1 answer

3k views

The derivation of the Mahalanobis distance formula [closed]

asked Jun 24, 2013 at 5:10

Stack Exchange Network

42 Questions

Bottom to top explanation of the Mahalanobis distance?

Why do we need to normalize data before principal component analysis (PCA)? [duplicate]

When should I apply feature scaling for my data [duplicate]

What is the intuition of invertible process in time series?

Book recommendations for beginners about probability distributions

Question about sample autocovariance function

Understanding the blue dotted lines in an ACF from R

Intuition behind the t-distributions density function

How to interpret autocorrelation of residuals and what to do with it?

Example of maximum a posteriori estimation

Comparing model evaluations of machine learning and statistics

What if Markov chain does not converge in a reasonable amount of time?

How to handle data normalization in kNN when new test data is received

Interpreting 3D scatter plot

Help understanding an explanation about minimum description length principle

How to deal with mixture of continuous and discrete features when using Naive Bayes classifier

Step-by-step example of predicting time series with ARIMAX or ARMAX model?

What is meant by effective parameters in machine learning

How to deal with unbalanced data

Confusion about error term in ARMA-model when predicting future values

Help with understanding stationarity

How to decide what to do with missing data when doing data analysis?

Help interpreting ACF- and PACF-plots

How do you sample data from a known distribution?

Understanding Dempster et al. on expectation maximization

Kernel density estimator function explanation needed

How does one visualize the self-organizing map of $n$-dimensional data

Is normalization required in Sammon mapping

How can permutation test be used for assessing the prediction capability of a model?

The derivation of the Mahalanobis distance formula [closed]