Hi
First you shall move your folders to some other place than c:. Let say
c:\project\country\...
after that you can list folders by ?list.dirs and files by ?list.files.
you can then navigate directories by ?setwd, ?getwd and read files from them.
The exact code depends on what exactly you have and want to do and I wonder if
anybody can give canned solution for you, especially when your files have
various origin.
Here is a sample of code reading files from folders, calculating some values,
plotting some graphs and writing final result.
wd<- getwd()
dirs<-list.dirs()
dirs<-dirs[-1]
n <- length(dirs)
pigm<-gsub("./([[:alnum:]])","\\1", dirs)
vysled <- data.frame(MinFeret=rep(NA, n), ECD = rep(NA, n),
aspect= rep(NA,n), pigment=rep("X", n), stringsAsFactors=F)
for (i in 1:length(dirs)) {
setwd(wd)
setwd(dirs[i])
if(file.exists("Results.xls")) {
velik<-read.delim("Results.xls")
zeros <- which(velik[,c(2,3,7)]<5, arr.ind=T)[,1]
if (length(zeros)>0) velik<-velik[-zeros,]
velik$ecd<-sqrt(4*velik$Area/pi)
velik$aspect<-velik$Feret/velik$MinFeret
velik <- velik[,-1]
maxx<-ceiling(max(velik$ecd)/100)*100
png(paste(pigm[i], "png", sep="."), 800,800)
plot(ecdf(velik$ecd), col=3, main=pigm[i], xlab="Particle size nm",
ylab="Cummulative percentage ECD", xlim=c(0,maxx))
plot(ecdf(velik$MinFeret), col=4, main=pigm[i], xlab="Particle size nm",
ylab="Cummulative percentage MinFeret", xlim=c(0,maxx), add=T)
abline(v=100, h=.5, col="pink", lwd=5)
legend(450, .2, legend=c("ECD", "MinFeret"), fill=3:4)
dev.off()
png(paste(paste(pigm[i], "ECD"), "png", sep="."), 800,800)
plot(ecdf(velik$ecd), col=3, main=pigm[i], xlab="Particle size nm",
ylab="Cummulative percentage ECD", xlim=c(0,maxx))
abline(v=100, h=.5, col="pink", lwd=5)
dev.off()
vysled[i,1:2]<- round(apply(velik[,6:7], 2, median),0)
vysled[i,3]<- round(median(velik[,8]),3)
vysled[i,4] <- pigm[i] } else {
vysled[i,4] <- pigm[i]}
setwd(wd)
write.table(vysled, "vysled.xls", sep="\t", row.names=F, na="")
}
Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Val
> Sent: Thursday, August 13, 2015 4:37 AM
> To: r-help@r-project.org
> Subject: [R] Reading multiple files from different folders
>
> Hi all,
>
> I have several files in different folders or subdirectories. Here is
> an example of the data set.
>
> c:\country\state\city. There might be more than 500 cities.
>
> **********************************
> c:\country\state\city1
> c:\country\state\city2
> .
> .
> .
> c:\country\state\city500
>
> ***************************
> Cities may keep the population record either in Excel file or text
> file format ( *.xlsx or *.txt)
>
> Each file contains : first name, last name, address, zip code, etc
>
> I want to create one data set from all the cities for analysis of
> in interest.
>
> Output should looks like
>
> country, state, city, first name, last name, address, zip code, etc.
> USA , NY , city1, Alex , John , 102 st name , 10004
> ,
> USA , NY , city1 Martin , Leno , 284
> street
> name , 10003 ,
> .
> .
> USA, NY , city500, Ethan , Noah , 543 st name , 10015 ,
>
> Please note that variables Country, state and city come from the "
> c:\country\state\city"
>
> I would appreciate your help me in reading and combing this data sets
>
> Thank you in advance,
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.
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