Thomas Hoffmann
1999-Oct-13 13:58 UTC
formatReal()-bug (or Is there anybody out there w/o IEEE754?)
On a system with IEEE_754 undefined, I run into an bug, when the value
of an element of the first argument (e.g., x[0]) of formatReal() is NA:
1. (format.c:235) if (!R_FINITE ..) gives nanflag=1 (!naflag remains 0)
2. (format.c:272..288) *m gets an value of -2147483643 (from the format
fiddling, should not matter to us)
3. (format.c:289) because naflag is zero, m does not get the value of
R_print.na_width and we get back the unbelievable value
from 2.
This crashes R in commands as
as.vector(NA,mode="double")
.
(Please reply to my mail address too, because I do not read r-devel regularly).
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Peter Dalgaard BSA
1999-Oct-13 15:17 UTC
formatReal()-bug (or Is there anybody out there w/o IEEE754?)
Thomas Hoffmann <hoffmann@ehmgs2.et.tu-dresden.de> writes:> On a system with IEEE_754 undefined, I run into an bug, when the value > of an element of the first argument (e.g., x[0]) of formatReal() is NA: > > 1. (format.c:235) if (!R_FINITE ..) gives nanflag=1 (!naflag remains 0) > 2. (format.c:272..288) *m gets an value of -2147483643 (from the format > fiddling, should not matter to us) > 3. (format.c:289) because naflag is zero, m does not get the value of > R_print.na_width and we get back the unbelievable value > from 2. > > This crashes R in commands as > as.vector(NA,mode="double") > .If a system isn't IEEE, it might not know about NaN either, so I suspect that one wants naflag = 1 rather than nanflag = 1. Could you try it and report back? -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._