[BioC] problem with NA

[Alberto Goldoni]

Hi to everybody,

	i have a little problem with some values:

when I type:

	tmp <- read.table("tottimecourse.txt", sep="\t", header=T,
na.strings = "")

some data appear with "NA" value.....:


[232] -1.64 -0.98 -0.48 -2.18 -0.41  0.07  0.03    NA -1.17 -0.70 -1.80
-0.95 -0.74 -0.66 -0.33    NA    NA    NA    NA    NA    NA
[253]    NA    NA    NA    NA    NA    NA    NA    NA -0.65  0.84 -0.59
0.01 -0.16 -0.71    NA    NA    NA    NA    NA    NA    NA
[274]    NA    NA    NA    NA    NA    NA    NA    NA    NA    NA    N


how can i apply a function in order to transfor "NA" with 0 ?

best wishes


Dr Alberto Goldoni

Medical Genetics Unit

S. Orsola-Malpighi Hospital

Via Massarenti n.9, Pad 11

40100 Bologna, Italy

Mobile Phone: +39-338-4145970

Fax: +39-051-636-4004

alberto.goldoni at eurogene.org

www.eurogene.org

www.lagem.it