35 lines
1.2 KiB
TeX
35 lines
1.2 KiB
TeX
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% Scheme of Covariance
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\documentclass[margin=0.5cm]{standalone}
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\usepackage{tikz}
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\usepackage{amssymb}
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\begin{document}
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\begin{tikzpicture}
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\usetikzlibrary{positioning}
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\tikzset{
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point/.style = {circle, inner sep={.75\pgflinewidth}, opacity=1, draw, black, fill=black},
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point name/.style = {insert path={coordinate (#1)}},
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}
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\begin{scope}[yshift=0]
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\draw (-4, 0.5) -- (4,0.5) node[right] {$Y_i$};
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\draw (-4, -0.5) -- (4,-0.5) node[right] {$Y_j$};
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\node at (6, 0) {$\mathrm{Cov}(Y_i, Y_j) > 0$};
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\node (EYipoint) at (0,0.5) {$\times$};
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\node at (0, 1) {$\mathbb{E}(Y_i)$};
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\node (EYipoint) at (0,-0.5) {$\times$};
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\node at (0, -1) {$\mathbb{E}(Y_j)$};
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\foreach \x in {-3, 0.5, 2.75} {
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\node[point] at (\x, 0.5) {};
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}
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\foreach \x in {-2, -1, 3} {
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\node[point] at (\x, -0.5) {};
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}
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\end{scope}
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\begin{scope}[yshift=-100]
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\draw (-4,0.5) -- (4,0.5) node[right] {$Y_i$};
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\draw (-4,-0.5) -- (4,-0.5) node[right] {$Y_j$};
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\node at (6, 0) {$\mathrm{Cov}(Y_i, Y_j) \approx 0$};
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\end{scope}
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\end{tikzpicture}
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\end{document}
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