On Sep 26, 2009, at 11:40 AM, John Kane wrote:
?subset
problems <- c( "Water damage", "Water off", "water pipes damaged",
"leaking water")
damaged <- subset(house_info, house_info[,1]==problems[1]
| house_info[,1]==problems[2]
| house_info[,1]==problems[3]
| house_info[,1]==problems[4])
or am I misunderstanding the question?
or perhaps %in% which probably does the job more elegantly but I
forget the syntax at the moment.
> problems <- c( "Water damage", "Water off", "water pipes damaged",
"leaking water")
> damaged <- subset(house_info, house_info[,1] %in% problems)
> str(damaged)
'data.frame': 49 obs. of 2 variables:
$ water_evaluation.water_evaluation_selection.: Factor w/ 5 levels
"No water damage",..: 5 3 5 2 5 3 5 3 5 5 ...
$ house_number : num 276 594 591 376
229 428 248 237 534 517 ...
--- On Fri, 9/25/09, Jason Rupert <jasonkrup...@yahoo.com> wrote:
From: Jason Rupert <jasonkrup...@yahoo.com>
Subject: [R] grep or other complex string matching approach to
capture necessary information...
To: R-help@r-project.org
Received: Friday, September 25, 2009, 1:58 PM
Say I have the following data:
house_number<-floor(runif(100, 200, 600))
water_evaluation<-c("No water damage", "Water damage",
"Water On", "Water off", "water pipes damaged", "leaking
water")
water_evaluation_selection<-floor(runif(100, 1,6))
house_info<-data.frame(water_evaluation[water_evaluation_selection],
house_number)
And, that I only want to pull out the ones with negative
water evaluations, i.e. Water damage, water pipes damaged,
and leaking water.
Should/could I use grep in order to pull the house numbers
out of house_info with those negative water
evaluations?
I guess I want to know the house numbers from house_info
where the water evaluation is negative. Is there a way
to use grep or another R function in order to acquire that
information?
Thank you again in advance for any insights.
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