Shouldn't the monadic
stddev 1 1 0 0 4 1 2 1 0 # 2 3 5 7 11 13 17 19 23
5.60258
equal the dyadic
1 1 0 0 4 1 2 1 0 stddev 2 3 5 7 11 13 17 19 23
5.82237
?
Den lørdag den 27. februar 2021 14.12.10 CET skrev Ric Sherlock
<[email protected]>:
Any objections to redefining mean, dev, ssdev, var, stddev in the
stats/base add on to calculate the weighted equivalents if invoked
dyadically?
I. E.
wmean=: +/@[ %~ +/@:*
wdev=: ] -"_1 _ wmean
wssdev=: [ +/@:* *:@wdev
wvar=: (#@-.&0 %~ <:@#@-.&0 * +/)@[ %~ wssdev
wstddev=: %:@wvar
mean=: (+/ % #) : wmean
dev=: (-"_1 _ mean) : wdev
ssdev=: (+/@:*:@dev) : wssdev
var=: (ssdev % <:@#) : wvar
stddev=: (%:@var) : wstddev
1 1 0 0 4 1 2 1 0 stddev 2 3 5 7 11 13 17 19 23
5.82237
stddev 2 3 5 7 11 13 17 19 23
7.45729
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