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usεr11852

Manchester, UK

Empiricist - trying to be rational.

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Top Answers
96
Are there cases where PCA is more suitable than t-SNE?
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74
"Model failed to converge" warning in lmer()
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55
Why is ANOVA equivalent to linear regression?
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52
How to generate correlated random numbers (given means, variances and degree of correlation)?
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43
Why is Average Treatment Effect different from Average Treatment effect on the Treated?
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42
Why is t-SNE not used as a dimensionality reduction technique for clustering or classification?
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35
Prerequisites for AIC model comparison
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34
Binary classification with strongly unbalanced classes
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32
What is "baseline" in precision recall curve
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29
What does it mean that AUC is a semi-proper scoring rule?
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29
How can I test whether a random effect is significant?
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25
Is the average of positive-definite matrices also positive-definite?
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23
What kind of information is Fisher information?
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23
Why uppercase for $X$ and lowercase for $y$?
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23
What is an intuitive interpretation of the leaf values in XGBoost base learners?
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22
Updating SVD decomposition after adding one new row to the matrix
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20
Choosing the hyperparameters using T-SNE for classification
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20
What important ideas came since Nelder and McCullagh's book Generalized Linear Models (a 40 year old book)?
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20
Which comes first - domain expertise or an experimental approach?
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19
How do I interpret this fitted vs residuals plot?
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19
What is the meaning of super script 2 subscript 2 within the context of norms?
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18
PCA iteratively finds directions of greatest variance; but how to find a whole subspace with greatest variance?
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18
What is the difference between multinomial and ordinal logistic regression?
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18
Classification XGBoost vs Logistic Regression
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17
What is wrong with extrapolation?
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16
How to choose the right optimization algorithm?
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16
What are efficient algorithms to compute singular value decomposition (SVD)?
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15
Why the default matrix norm is spectral norm and not Frobenius norm?
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15
Difference between local regression and moving average for smoothing
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15
When should I balance my data for GLM/GAM?
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