[daip] IRING q?
Eric Greisen
egreisen at nrao.edu
Tue Jul 30 10:50:15 EDT 2013
Lawrence Rudnick wrote:
> Eric - what is the formal definition of sigma in IRING output? thanks. lr
>
MEAN(K) = MEAN(K) + VAL
MEANSQ(K) = MEANSQ(K) + VAL * VAL
where K is the ring counter
MEAN(K) = MEAN(K) / NP(K)
MEANSQ(K) = MEANSQ(K) / NP(K)
SIGMA = SQRT (MAX (0.0D0, MEANSQ(K) - MEAN(K) * MEAN(K)))
IF (NNZ(K).GT.1) SIGMA = SIGMA / SQRT (NNZ(K)-1.0)
ERR(K) = SIGMA
ERRS(K) = SIGMA * SIGMA
IF (K.GT.1) ERRS(K) = ERRS(K) + ERRS(K-1)**2
ERRS(K) = SQRT (ERRS(K))
where ERR is printed if one is plotting the individual rings and ERRS is
printed if one is doing the cumulative sum.
RMFIT got some minor improvements recently and 31DEC13 had a serious bug
fix.
Eric
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