From: Sheri Conner Gausepohl <sheri_at_atmos.colostate.edu>

Date: Wed 13 Jul 2005 - 07:46:57 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Jul 13 07:49:00 2005

Date: Wed 13 Jul 2005 - 07:46:57 EST

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

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Jul 13 07:49:00 2005

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