# Testar Syntax Highlighter

\[

A=\begin{bmatrix}

\frac{1}{3} & \frac{1}{3} & \frac{1}{3} \[6pt]

\frac{2}{3} &\frac{-1}{3} &\frac{-1}{3} \[6pt]

\frac{1}{3} & \frac{1}{3} & \frac{-2}{3}

\end{bmatrix}

\]

## Test för R

plotSubset <- data.frame(scale(mdrrDescr[, c("nC", "X4v")])) xyplot(nC ~ X4v, data = plotSubset, groups = mdrrClass, auto.key = list(columns = 2))

## Test för Python

from sklearn.feature_selection import VarianceThreshold X = [[0, 0, 1], [0, 1, 0], [1, 0, 0], [0, 1, 1], [0, 1, 0], [0, 1, 1]] sel = VarianceThreshold(threshold=(.8 * (1 - .8))) sel.fit_transform(X) array([[0, 1], [1, 0], [0, 0], [1, 1], [1, 0], [1, 1]])

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