adding header info to write.table

You know...I almost added this to your original post because I thought
you might want to read something back into ArcInfro when you were done!

Look at ?files

The easiest thing to do in R is to keep your header as a text file in
the working directory and then append it to your output file using
'file.append'

write.table(your output file)
file.copy("header.txt", "final.output.txt")
file.append("final.output.txt", "output.dat")

Using 'paste' for the file names makes this easy and flexible.

HTH, Andy

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch 
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of femke
Sent: Thursday, February 26, 2004 2:16 PM
To: r-help at stat.math.ethz.ch
Subject: [R] adding header info to write.table


Hello,

Could someone please tell if there is a way to append header 
info to the top of an exported dataframe (exported with 
write.table).  I want to append the following, which are the 
defininitions for an asciigrid:

ncols         532
nrows         999
xllcorner     510465
yllcorner     4766375
cellsize      30
NODATA_value  -9999


Thanks very much,

femke
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______________________________________________
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do read the posting guide! 
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Hello,

Could someone please tell if there is a way to append header info to the
top of an exported dataframe (exported with write.table).  I want to
append the following, which are the defininitions for an asciigrid:

ncols         532
nrows         999
xllcorner     510465
yllcorner     4766375
cellsize      30
NODATA_value  -9999

zz <- file("myraster", "w")
cat("ncols         532\nnrows         999\n", file=zz)
cat("xllcorner     510465\nyllcorner     4766375\n", file=zz)
cat("cellsize      30\nNODATA_value  -9999\n", file=zz)
write.table(data, file=zz, append=TRUE, col.names=FALSE, row.names=FALSE)
close(zz)

using connections (see help(connections)) and the append= argument in 
write.table. Is everybody writing ArcGIS ASCII rasters recently?

Thanks very much,

femke
	[[alternative HTML version deleted]]

______________________________________________
R-help at stat.math.ethz.ch mailing list
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Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no

|> Hello,
|> 

|> Could someone please tell if there is a way to append header info
|> to the top of an exported dataframe (exported with write.table).  I
|> want to append the following, which are the defininitions for an
|> asciigrid:


|> ncols         532
|> nrows         999
|> xllcorner     510465
|> yllcorner     4766375
|> cellsize      30
|> NODATA_value  -9999

?write

then use append = TRUE when using write.table

HTH

Patrick Connolly
HortResearch
Mt Albert
Auckland
New Zealand 
Ph: +64-9 815 4200 x 7188
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~
I have the world`s largest collection of seashells. I keep it on all
the beaches of the world ... Perhaps you`ve seen it.  ---Steven Wright 
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~

Is everybody writing ArcGIS ASCII rasters recently?

The GIS community is hopelessly tied to ESRI. So many people have
invested their careers in learning Arc that switching to GRASS is an
institutional nightmare. Most of what I do now is outside of Arc! And
certainly outside of their almost useless GUI.