On May 9, 2011, at 10:07 AM, Nilza BARROS wrote:
Dear R users,
I am reading data from a file where there are some missing that are
represented by -9999.00.
I am using the command below.
=====My original data ===========
PARM = TMPC;T12X;T12N;DWPC;PALT;SKNT;DRCT;P24M;CLCL
snipped
But I need to feed my database. These missings should be
represented by
NULL.
I mean, all "NA" should be replaced by "NULL" in my database.
Do you mean a string that is spelled "NULL"
If so, try:
dfrm[is.na(dfrm)] <- "NULL"
I am trying the command below to pick up the rows and columns with
NA but I
don't know how to fill the original data :
which(is.na(Alldados),arr.ind=TRUE)
But I don't know how to replace each NA with NULL. I tried using
as.null but
NA is not replace at all.
If you set a column of a data.frame to NULL , it will erase it.
I hope someone could help me.
Best Wishes,
Nilza Barros
David Winsemius, MD
West Hartford, CT
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