R help - Mar 2016 - Error in if (x[j, g] == x[i, g]) { : missing value where TRUE/FALSE needed

I am using the "hydroTSM" package and "trend" package to
convert my daily
time series into monthly and then analyze the seasonal trend. My code is

y <-read.csv("P-GHCNDUSW00093820.csv",as.is=TRUE)
y$DATE <- as.Date(as.character(y$DATE),format="%Y%m%d")
x <- xts(y$PRCP,y$DATE)
p <- daily2monthly(x, FUN=sum, na.rm = T)
r <- as.ts(p)
SeasonalMannKendall(r)

The last line returns an error like
Error in if (x[j, g] == x[i, g]) { :
  missing value where TRUE/FALSE needed

I suspect that the error is because of the format of the time series object
which may not be correct as in the attached image. It is making the monthly
sums correct however I don't know why there are so many NA values. Each
year should have only 12 values for the 12 months.

Any ideas how to fix this error?


-- 
*Somsubhra Chattopadhyay*
Graduate Research Assistant
Biosystems and Agricultural Engineering Department
University of Kentucky, Lexington, KY 40546
Email: schattop14 at uky.edu
Cell: 9198026951

> On Mar 17, 2016, at 8:22 AM, Chattopadhyay, Somsubhra <sch298 at
g.uky.edu> wrote:
> 
> I am using the "hydroTSM" package and "trend" package
to convert my daily
> time series into monthly and then analyze the seasonal trend. My code is
> 
> y <-read.csv("P-GHCNDUSW00093820.csv",as.is=TRUE)
> y$DATE <- as.Date(as.character(y$DATE),format="%Y%m%d")
> x <- xts(y$PRCP,y$DATE)
> p <- daily2monthly(x, FUN=sum, na.rm = T)
> r <- as.ts(p)
> SeasonalMannKendall(r)
> 
> The last line returns an error like
> Error in if (x[j, g] == x[i, g]) { :
>  missing value where TRUE/FALSE needed
After each line of code you should be examining the results of `str` applied to
the results to see if you are actually succeeding. And given the error message
you might consider looking at:

 sum( is.na( y$DATE))

> 
> I suspect that the error is because of the format of the time series object
> which may not be correct as in the attached image.

No image attached. Read the info page and the posting guide again.
> It is making the monthly
> sums correct however I don't know why there are so many NA values. Each
> year should have only 12 values for the 12 months.
> 
> Any ideas how to fix this error?
> 
> 
> -- 
> *Somsubhra Chattopadhyay*
-- 

David Winsemius
Alameda, CA, USA