There seems to be an error in the summary() function when applied to "ts"
class objects. The results of a call to summary( ), on the R "ts" data set
USAccDeaths , reports the wrong value for Max. The value reported by the
summary function is 11320. The max( ) function returns the correct value
11317, the July 1993 value. Coercing the data to a data.frame and calling
summary returns the correct max value. A search of R -help found a post in
2007 that mentioned a problem but attributed it to rounding errors. But this
is too large a difference to account for a simple rounding error.
Has anyone else encountered the problem? Is there a workaround?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
R version 2.6.2 Patched (2008-02-08 r44394)
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> data(USAccDeaths)
> summary(USAccDeaths)
Min. 1st Qu. Median Mean 3rd Qu. Max.
6892 8089 8728 8789 9323 11320
> max(USAccDeaths)
[1] 11317
> USAccDeaths
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1973 9007 8106 8928 9137 10017 10826 11317 10744 9713 9938 9161 8927
1974 7750 6981 8038 8422 8714 9512 10120 9823 8743 9129 8710 8680
1975 8162 7306 8124 7870 9387 9556 10093 9620 8285 8466 8160 8034
1976 7717 7461 7767 7925 8623 8945 10078 9179 8037 8488 7874 8647
1977 7792 6957 7726 8106 8890 9299 10625 9302 8314 8850 8265 8796
1978 7836 6892 7791 8192 9115 9434 10484 9827 9110 9070 8633 9240
> dat1<-as.data.frame(USAccDeaths)
> summary(dat1)
x
Min. : 6892
1st Qu.: 8089
Median : 8728
Mean : 8789
3rd Qu.: 9323
Max. :11317
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Thanks,
R Saba
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