[R] loading data from a specified directory

[Sam McClatchie]

System info:
Linux slackware
R Version 1.5.1  (2002-06-17)
ESS 5.1.21
Emacs 21.2.1
-------------------
Colleagues

I have some text files in a certain directory and want to process them 
sequentially. So I want to pass the filename identifier into a function 
and loop through the processing of each file in turn.I've called the 
file identifier f in this code segment:

image.dvm <- function (horiz.slice.int=2, ping.int=3,
                        start.h=3, start.min=4,
                        max.z=800, f=350:372)
{
   ## Purpose: to display the whole echogram integrals for consecutive CREST
   ## files to illustrate patterns of diel vertical migration
   ## ----------------------------------------------------------------------
   ## Arguments:
   ## ----------------------------------------------------------------------
   ## Author: Sam McClatchie, Date:  6 Sep 2002, 12:02


   for (i in 1:length(f))
       paste("t.",f[1], sep="") 
<-read.table(paste("/home/smc/manuscripts/mesopelagic_fish/biomass_spectrum/we0000",f[1],sep=""), 
header=F)

-----------------
There is nothing wrong with the text files because I can read them 
correctly with:
 > t.350 <- read.table('we0000350', header=F)
 > t.350[1:5,1:4]
            V1         V2         V3          V4
1 0.00000e+00 0.0000e+00 0.0000e+00 0.00000e+00
2 0.00000e+00 0.0000e+00 0.0000e+00 0.00000e+00
3 0.00000e+00 0.0000e+00 0.0000e+00 0.00000e+00
4 0.00000e+00 0.0000e+00 0.0000e+00 0.00000e+00
5 8.71053e-05 4.2294e-05 3.6614e-05 6.68651e-05
 >
However, running the code segment above gives an error that has me a 
little bemused:

 > image.dvm()
Error in image.dvm() : Target of assignment expands to non-language object
 >

I guess I'm doing something illegal with the paste command?

   paste("t.",f[1], sep="") <- read.table....

Can you help, please?

Sam
-- 
Sam McClatchie, Research scientist (fisheries acoustics))))))))))
NIWA (National Institute of Water & Atmospheric Research Ltd)
PO Box 14 901, Kilbirnie, Wellington, New Zealand
s.mcclatchie at niwa.cri.nz
Research home page <http://www.smcc.150m.com/>
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