Good day:

I am trying to use
readcsvIts("nwr_data_qc.txt",informat=its.format("%Y%m%d%h%M
%Y"),header=TRUE,sep="",skip=0,row.names=NULL,as.is=TRUE,dec=".")

to read in a file (nwr_data_qc.txt) that looks like this:

Time      Y    M  D H  Min   CO2
2000.18790  2000. 3. 9. 18. 30.   373.60
2000.20156  2000. 3. 14. 18. 30.   373.34
2000.22609  2000. 3. 23. 18. 0.   373.01

and R returns this:

     Y M D H Min   CO2
<NA> 2000 3 9 18 30 373.60
<NA> 2000 3 14 18 30 373.34
<NA> 2000 3 23 18  0 373.01

I have tried every format option on the help page. How can I read in
my decimal dates (e.g., 2000.18790)?

Note that these data (CO2) are irregularly spaced in time (Time).

Ultimately I would like to fit a trigonometric polynomial (first
harmonic) to these data in order to smooth them and obtain values
between measurements. Any suggestions you can provide on how to do
this would be much appreciated.

Thank you for your help.

Sheri

Sheri L. Conner Gausepohl
Graduate Research Assistant
Department of Atmospheric Science
Colorado State University

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