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15 lines
705 B
SQL
15 lines
705 B
SQL
SET allow_experimental_analyzer = 1;
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SELECT
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arraySum(x -> ((x.1) / ((x.2) * (x.2))), arrayZip(mag, magerr)) / arraySum(x -> (1. / (x * x)), magerr) AS weightedmeanmag,
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arraySum(x -> ((((x.1) - weightedmeanmag) * ((x.1) - weightedmeanmag)) / ((x.2) * (x.2))), arrayZip(mag, magerr)) AS chi2,
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[1, 2, 3, 4] AS mag,
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[0.1, 0.2, 0.1, 0.2] AS magerr;
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SELECT
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arraySum(x -> ((x.1) / ((x.2) * (x.2))), arrayZip(mag, magerr)) / arraySum(x -> (1. / (x * x)), magerr) AS weightedmeanmag,
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arraySum(x -> ((((x.1) - weightedmeanmag) * ((x.1) - weightedmeanmag)) / ((x.2) * (x.2))), arrayZip(mag, magerr)) AS chi2,
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[1, 2, 3, 4] AS mag,
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[0.1, 0.2, 0.1, 0.2] AS magerr
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WHERE isFinite(chi2)
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