[R] replacement has length zero. In addition: Warning message: In max(i) : no non-missing arguments to max; returning -Inf

[arun]

Hi,

Here, I am getting the error:

 for(i in 1:dim(diveCond)[1]){
 thisStamp <- as.POSIXct(strptime(diveCond$timestamp[i], "%Y-%m-%d
 %H:%M:%S"))
 ind <- which.min( abs(index(regCond_all) - thisStamp ))
 diveCond$r_wvht[i] <- regCond_all$WVHT[ind]
 diveCond$r_dpd[i] <- regCond_all$DPD[ind]
 diveCond$r_apt[i]  <- regCond_all$APD[ind]
 diveCond$r_mwd[i]  <- regCond_all$MWD[ind]
 diveCond$r_wtmp[i]  <- regCond_all$WTMP[ind]
 }
Error in index(regCond_all) : object 'regCond_all' not found
> u=regCond_all[1:10,]
Error: object 'regCond_all' not found


  From a glance, I guess you should have posted with "u" in place of regCond_all for the loop.  

A.K.

----- Original Message -----
From: Yolande Tra <yolande.tra at gmail.com>
To: R help <r-help at r-project.org>
Cc: 
Sent: Friday, August 3, 2012 3:49 PM
Subject: [R] replacement has length zero. In addition: Warning message: In max(i) : no non-missing arguments to max; returning -Inf

Hi,

Here is my data, the first 10 rows
> u=regCond_all[1:10,]
> dput(u)
structure(c(999, 999, 999, 999, 999, 999, 999, 999, 999, 999,
99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 1.9, 2, 1.97, 1.99, 1.83, 1.78, 1.6, 1.52, 1.52,
1.36, 10.53, 9.88, 9.88, 10.53, 10.53, 10.53, 5.26, 9.88, 10.53,
10.53, 5.4, 5.57, 5.46, 5.34, 5.5, 5.59, 5.62, 5.76, 6.23, 6.19,
295, 294, 292, 294, 283, 288, 305, 287, 294, 295, 9999, 9999,
9999, 9999, 9999, 9999, 9999, 9999, 9999, 9999, 999, 999, 999,
999, 999, 999, 999, 999, 999, 999, 12.7, 12.5, 12.3, 12.6, 12.6,
12.5, 12.5, 12.5, 12.7, 12.7, 999, 999, 999, 999, 999, 999, 999,
999, 999, 999, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 99, 99), class = c("xts", "zoo"), .indexCLASS =
c("POSIXct",
"POSIXt"), .indexTZ = "", tclass = c("POSIXct", "POSIXt"), tzone = "",
index = structure(c(1217564520,
1217566320, 1217568120, 1217569980, 1217571720, 1217573520, 1217575320,
1217577120, 1217578920, 1217580720), tzone = "", tclass = c("POSIXct",
"POSIXt")), .Dim = c(10L, 13L), .Dimnames = list(NULL, c("WDIR",
"WSPD", "GST", "WVHT", "DPD", "APD", "MWD", "PRES", "ATMP", "WTMP",
"DEWP", "VIS", "TIDE")))

I tried to copy some fields from this data to another data. I got error.
Could you please help? Thanks.
diveCond <- data.frame(matrix(0, nrow=97, ncol=17))
names(diveCond) <- c("dive_id", "timestamp", "visability", "r_wvht",
"r_dpd", "r_apt", "r_mwd", "r_wtmp", "l_salinity", "l_o2", "l_hs", "l_tp",
"l_wdir", "l_along", "l_cross", "l_mab", "l_depth")
dive_id <- 0
for(i in 1:dim(diveCond)[1]){
thisStamp <- as.POSIXct(strptime(diveCond$timestamp[i], "%Y-%m-%d
%H:%M:%S"))
ind <- which.min( abs(index(regCond_all) - thisStamp ))
diveCond$r_wvht[i] <- regCond_all$WVHT[ind]
diveCond$r_dpd[i] <- regCond_all$DPD[ind]
diveCond$r_apt[i]  <- regCond_all$APD[ind]
diveCond$r_mwd[i]  <- regCond_all$MWD[ind]
diveCond$r_wtmp[i]  <- regCond_all$WTMP[ind]
}

Error in diveCond$r_wvht[i] <- regCond_all$WVHT[ind] :
  replacement has length zero
In addition: Warning message:
In max(i) : no non-missing arguments to max; returning -Inf
If you could explain the error that would help prevent future errors.

Thanks,
Y

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