[R] dates and time series management

Wed Jun 5 15:44:41 CEST 2013

Hi,
Try this:
lstf1<- list.files(pattern=".txt")
length(lstf1)
#[1] 119
fun2<- function(lstf){
 lst1<-lapply(lstf,function(x) readLines(x))
 lst2<-lapply(lst1,function(x) {gsub("(\\d+)(-9999.99)","\\1 \\2",x)})
 lst3<-lapply(lst2,function(x) {x<-gsub("(\\d+)(-9999.99)","\\1 \\2",x)})
 lst4<- lapply(lst3,function(x) read.table(text=x,header=TRUE,stringsAsFactors=FALSE,sep="",fill=TRUE))
 lst5<- lapply(lst4,function(x) x[x$V1>=1961 & x$V1<=2005,])
 lst6<- lapply(lst5,function(x) x[!is.na(x$V1),])
 lst7<- lapply(lst6,function(x) {
                     if((min(x$V1)>1961)|(max(x$V1)<2005)){
                         n1<- (min(x$V1)-1961)*12
                         x1<- as.data.frame(matrix(NA,ncol=ncol(x),nrow=n1))
                         n2<- (2005-max(x$V1))*12
                         x2<- as.data.frame(matrix(NA,ncol=ncol(x),nrow=n2))
                         x3<- rbind(x1,x,x2)
                        }
                          else {
                    x
                    } })

lst8<- lapply(lst7,function(x) data.frame(col1=unlist(x[,-c(1:2)])))
     lst9<- lapply(seq_along(lst8),function(i){
                        x<- lst8[[i]]
                        colnames(x)<- lstf1[i]
                        row.names(x)<- 1:nrow(x)
                        x
                        })
 do.call(cbind,lst9)}
res<-fun2(lstf1)
dim(res)
#[1] 16740   119
res[1:5,1:3]
 # dt3011120.txt dt3011240.txt dt3011887.txt
#1          1.67            NA          0.17
#2          0.00            NA          0.28
#3          0.00            NA          0.00
#4          0.00            NA          0.30
#5          0.00            NA          0.00

########################################

There are some formatting issues in your files:
For eg. If I run the function line by line:

 lst1<-lapply(lstf1,function(x) readLines(x))
sapply(lst1,function(x) any(grepl("\\d+-9999.99",x)))
  [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [13] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [37]  TRUE FALSE  TRUE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE
 [49] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [61] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [73] FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE  TRUE FALSE
 [85] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE
 [97] FALSE FALSE FALSE FALSE FALSE FALSE  TRUE  TRUE FALSE FALSE FALSE FALSE
[109] FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE  TRUE

###means some rows in the a few files have:
#-9999.99 0 0 0 0.00-9999.99 0 0.00-9999.99 0 0 0 0.00-9999.99 (no space before -9999.99)

 lst2<-lapply(lst1,function(x) {gsub("(\\d+)(-9999.99)","\\1 \\2",x)})
sapply(lst2,function(x) any(grepl("\\d+-9999.99",x))) #still a few files had the problem
  [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [13] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [25] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [37] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [49] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [61] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
 [73] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE
 [85] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE
 [97] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
[109] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
lst3<-lapply(lst2,function(x) {x<-gsub("(\\d+)(-9999.99)","\\1 \\2",x)})
any(sapply(lst3,function(x) any(grepl("\\d+-9999.99",x))))
#[1] FALSE
lst4<- lapply(lst3,function(x) read.table(text=x,header=TRUE,stringsAsFactors=FALSE,sep="",fill=TRUE))

any(sapply(lst4,function(x) any(sapply(x,is.character))))
#[1] FALSE

 lst5<- lapply(lst4,function(x) x[x$V1>=1961 & x$V1<=2005,])
lst6<- lapply(lst5,function(x) x[!is.na(x$V1),])
sapply(lst6,nrow)
 # [1] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [19] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [37] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [55] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [73] 540 540 540 540 528 492 528 540 348 540 540 480 540 540 540 540 540 540
# [91] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 528 540 540 540
#[109] 540 540 540 540 540 540 540 540 540 468 540

     lst7<- lapply(lst6,function(x) {
                     if((min(x$V1)>1961)|(max(x$V1)<2005)){
                         n1<- (min(x$V1)-1961)*12
                         x1<- as.data.frame(matrix(NA,ncol=ncol(x),nrow=n1))
                         n2<- (2005-max(x$V1))*12
                         x2<- as.data.frame(matrix(NA,ncol=ncol(x),nrow=n2))
                         x3<- rbind(x1,x,x2)
                        }
                          else {
                    x
                    } })

 sapply(lst7,nrow)
#  [1] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [19] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [37] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [55] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [73] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
# [91] 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540 540
#[109] 540 540 540 540 540 540 540 540 540 540 540

Hope this helps.
A.K.

________________________________
From: Zilefac Elvis <zilefacelvis at yahoo.com>
To: arun <smartpink111 at yahoo.com> 
Sent: Wednesday, June 5, 2013 2:05 AM
Subject: Re: dates and time series management

Hi A.K,
Sorry my internet connection was so bad last evening.

I have attached all the files as .zip.
Below is the output you requested.
As I explained, the start date in 'res' should be 1961 and end date should be 2005 in all 119 files.

Thanks A.K

> lapply(lst1,head,3)
[[1]]
  V1.V2.V3.V4.V5.V6.V7.V8.V9.V10.V11.V12.V13.V14.V15.V16.V17.V18.V19.V20.V21.V22.V23.V24.V25.V26.V27.V28.V29.V30.V31.V32.V33
1                        1915 1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
2                        1915 2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
3                        1915 3 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA

[