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meTchaikovsky
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49 votes
1 answer
54k views

Why KL divergence is non-negative?

15 votes
4 answers
10k views

What causes lasso to be unstable for feature selection?

9 votes
2 answers
13k views

Why does larger perplexity tend to produce clearer clusters in t-SNE?

8 votes
1 answer
520 views

Sparse linear regression 0-norm and 1-norm

6 votes
1 answer
653 views

Linear regression with $l_0$ regularization

6 votes
1 answer
128 views

A question about the inversion method

5 votes
1 answer
205 views

What can we learn from this visualization?

5 votes
2 answers
3k views

KL divergence invariant to affine transformation?

4 votes
1 answer
3k views

Data sparsity becomes a problem

4 votes
1 answer
892 views

Variational autoencoder obtain high likelihood but produce low quality sample?

4 votes
1 answer
1k views

How to continuously rotate a bivariate normal distribution by changing its correlation matrix?

3 votes
1 answer
516 views

Train an ensemble of neural networks on different datasets, what is the best way to scale the inputs?

3 votes
0 answers
29 views

Increase the number of samples when the PDF is invariant

3 votes
1 answer
1k views

Can we still use conjugate gradient descent when we don't know the Hessian matrix?

3 votes
1 answer
536 views

Feature filtering with LASSO and cross validation

2 votes
1 answer
1k views

What is $\lambda_{min}$ that makes all regression coefficients zero in LASSO regression [duplicate]

2 votes
0 answers
65 views

Select 3 features from 4000 correlated features

2 votes
1 answer
102 views

$\lambda \Vert k \Vert_0$ or $\Vert k \Vert_0 \leqslant n$

2 votes
0 answers
447 views

How do we train variational autoencoders in practice?

2 votes
1 answer
648 views

Joint distribution in latent Dirichlet model

2 votes
0 answers
2k views

Prove linear transformation of gaussian random vectors are still gaussian random vectors

2 votes
1 answer
3k views

How to perform batch training using L-BFGS?

2 votes
1 answer
63 views

How to differentiate through the optimization process in Model-Agnostic Meta-Learning?

2 votes
1 answer
3k views

Can t-SNE help feature selection?

2 votes
1 answer
71 views

Should I discard a feature whose max - min is smaller than 1e-5?

1 vote
0 answers
70 views

Why it is hard for `xgboost` to learn periodic functions?

1 vote
1 answer
807 views

Does it make sense to run lasso to select features for neural network training?

1 vote
2 answers
281 views

Can a neural network learned function $f$ be used for calculating its derivate $f'$?

1 vote
1 answer
4k views

Can PCA be used for detecting multicollinearity?

1 vote
1 answer
235 views

$\lambda_{\min}$ is $ \frac{1}{N}\max|\sum_{j}y^TX_j|$ rather than $\max|\sum_{j}y^TX_j|$?