I am trying to use the SeasonalMannKendall function in the Kendall package.
My dataset (alb_data) is in the same format as the example dataset 
(manaus) in the package.

 > class(manaus)
[1] "ts"
 > is.ts(manaus)
[1] TRUE
 > typeof(manaus)
[1] "double"
 > alb_data=read.table("R:/albemarle_manken.txt", header=T)
 > head(alb_data)
   year    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug Sep    
Oct    Nov    Dec
1 1997    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN 23.406 
16.166 16.057 16.803
2 1998 14.157 14.605 14.112 17.709 13.800 14.338 14.157 17.404 17.725 
15.429 16.090 18.061
3 1999 14.888 13.837 15.929 13.637 16.020 14.699 15.987 15.212 14.752 
15.935 13.397 21.725
4 2000 16.562 18.125 19.600 17.971 16.454 15.129 13.901 21.664 17.675 
13.793 13.464 16.452
5 2001 15.706 16.417 13.324 14.117 13.550 15.825 14.687 14.844 15.006 
14.793 13.489 15.726
6 2002 11.777 11.775 11.564 13.141 14.462 15.517 18.801 15.652 17.127 
14.070 14.626 17.964
 > class(alb_data)
[1] "data.frame"
 > is.ts(alb_data)
[1] FALSE
 > typeof(alb_data)
[1] "list"


Can anyone please help me get my dataset into the correct format so that 
I can run the test?
Thank you for your time and help!




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