35 lines
1.1 KiB
TeX
35 lines
1.1 KiB
TeX
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\chapter{Introduction}
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\begin{definition}[Long Term Nonprocessor (LTNP)]
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Patient who will remain a long time in good health condition, even with a large viral load (cf. HIV).
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\end{definition}
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\begin{example}[Genotype: Qualitative or Quantitative?]
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\[
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\text{SNP}:
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\begin{cases}
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\text{AA} \\
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\text{AB} \\
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\text{BB}
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\end{cases}
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\rightarrow
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\begin{pmatrix}
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0 \\
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1 \\
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2
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\end{pmatrix},
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\]
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thus we might consider genotype either as a qualitative variable or quantitative variable.
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\end{example}
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When the variable are quantitative, we use regression, whereas for qualitative variables, we use an analysis of variance.
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\begin{figure}
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\begin{subfigure}{0.45\columnwidth}
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\includegraphics[width=\columnwidth]{figures/plots/linear_regression_linear.pdf}
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\end{subfigure}
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\begin{subfigure}{0.45\columnwidth}
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\includegraphics[width=\columnwidth]{figures/plots/linear_regression_non_linear.pdf}
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\end{subfigure}
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\caption{Illustration of two models fitting observed values}
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\end{figure}
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