17 lines
476 B
TypeScript
17 lines
476 B
TypeScript
import pl from "npm:nodejs-polars";
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export function residuals(x: pl.Expr, y: pl.Expr): pl.Expr {
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const xM = x.minus(x.mean());
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const yM = y.minus(y.mean());
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const xMSQ = xM.pow(2);
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const beta = xM.dot(yM).div(xMSQ.sum());
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return yM.minus(beta.mul(xM));
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}
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export const ScaleExpr: pl.Expr = (pl.all().minus(pl.all().min())).div(
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pl.all().max().minus(pl.all().min()),
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);
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export const StdNormExpr: pl.Expr = pl.all().minus(pl.all().mean()).div(
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pl.all().std(),
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);
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