On Dec 31, 2012, at 3:22 AM, Irucka Embry wrote:
Hi Jorge, thank-you for the quick response. That suggestion worked
perfectly.
<-----Original Message----->
From: Jorge I Velez [jorgeivanve...@gmail.com]
Sent: 12/31/2012 5:05:14 AM
To: iruc...@mail2world.com
Cc: r-help@r-project.org
Subject: Re: [R] error when using subset (0 observations)
Dear Irucka,
Use "02169570" instead of 02169570 -- note the quotes -- when calling
subset().
Irucka; Please note that subset should allow specification of subset
using logical tests on numeric variables without using quotes, and
that Jorge was making an educated guess that you had unwittingly made
a logical test on a character vector using a numeric comparison.
--
David.
On Mon, Dec 31, 2012 at 9:45 PM, Irucka Embry <> wrote:
Hi, how are you?
My name is Irucka Embry and I would like assistance on properly
subsetting some data obtained from a .csv file.
file <-"info_n.csv"
INFO<- getMetaDataFromFile(file)
INFO is 92 observations of 14 variables
INFO<- subset(INFO,site.no==02169570)
INFO is 0 observations of 14 variables
When the site.no is used I should have 1 observation of 14 variables
instead of 0. Can you assist me?
Thank-you.
Irucka Embry
This is the function that is called:
getMetaDataFromFile <- function(file, hasHeader = TRUE, separator =
",")
{
totalPath <- paste(file, sep = "")
tmp <- read.csv(totalPath, header = hasHeader, sep = separator,
fill =
TRUE, comment.char = "#", as.is = TRUE, stringsAsFactors = FALSE,
na.strings = "NA")
retval <- as.data.frame(tmp, stringsAsFactors = FALSE)
return(retval)
}
This is an example of the data that is stored in the "info_n.csv"
file.
There are 92 total sites in this file.
site.no flowstation.no shortName dec.lat.va dec.long.va drainSqKm
areaUnits drainSqKmFlow areaUnits staAbbrev param.nm paramShortName
constitAbbrev param.units
2169570 2169570 Gills Creek at Columbia, SC 33.98960016 -80.97425727
152.7543752904 2 152.7543752904 2 GillsColumSC Total nitrogen, water,
unfiltered, milligrams per liter Nitrate as N TN mg/L
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