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mynameisJEFF
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49 votes
3 answers
98k views

Derive Variance of regression coefficient in simple linear regression

27 votes
1 answer
9k views

What exactly is called "principal component" in PCA?

20 votes
2 answers
23k views

Compute and graph the LDA decision boundary

10 votes
2 answers
9k views

How to find optimal values for the tuning parameters in boosting trees ?

8 votes
2 answers
16k views

How to generate uncorrelated white noise sequence in R without using arima.sim?

7 votes
3 answers
10k views

Can I fit logistic regression over a dataset with only categorical data?

6 votes
1 answer
4k views

How do I transform a non-linear relationship to make it linear?

6 votes
3 answers
6k views

Deriving the optimal value for the intercept term in SVM

6 votes
1 answer
9k views

Estimating the covariance matrix in linear discriminant analysis

5 votes
2 answers
9k views

What is the difference between support vector machines and support vector regression?

4 votes
1 answer
5k views

Understanding the geometric margin of SVM

4 votes
1 answer
534 views

Understand the reasons of using Kernel method in SVM

3 votes
1 answer
342 views

Equation 3.49 from Elements of Statistical Learning

2 votes
1 answer
13k views

distortion function for k-means algorithm

2 votes
1 answer
632 views

Reproducing the Table 3.2 from the Elements of Statistical Learning

2 votes
1 answer
3k views

glmnet in R: Selecting the right $\alpha$

2 votes
0 answers
408 views

How do I tune the $\alpha$ parameter in glmnet ? How to define an optimal $\alpha$

2 votes
0 answers
134 views

How does one differentiate the log likelihood of a multivariate normal density?

2 votes
2 answers
1k views

Difference time series and then minus the mean of the differenced series within Arima

1 vote
1 answer
578 views

How to select model based on Cross Validation?

1 vote
1 answer
106 views

Deriving the in-sample error for linear model from the elements of statistical learning

1 vote
0 answers
6k views

How to interpret the LDA output in R?

1 vote
0 answers
666 views

The Intercept terms for Ridge regression, lasso , pcr and PLS (elements of statistical learning)

1 vote
1 answer
2k views

Scaling data: why not standardize response variable to unit variance (in addition to zero mean)?

1 vote
0 answers
112 views

Constructing the approximate confidence set for parameter vector beta in least square regression

1 vote
0 answers
23 views

Newton Raphson Algorithm: negative semi definiteness [duplicate]

0 votes
1 answer
209 views

How is Gram-Schmidt procedure used in the following time series context?

0 votes
0 answers
913 views

Glmnet: How to avoid glmnet from standardizing the factor/dummy variables?