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Change the format of widescreen data in a long format

I am struggling with converting a set of panel sets from a wide format to a long one. The Dataset set looks like this:

ID | KP1_430a | KP1_430b | KP1_430c | KP2_430a | KP2_430b | KP2_430c | KP1_1500a | ...  
1     ....
2     ....

KP1; KP2 to KP7 describe the Waves. a, b to f describe a particular element. (For example, right-sided placement of Party a)

I would like to have this data in a long format. Like this:

ID | Party | Wave | 430 | 1500  
 1     1       1     ..    ..
 1     2       1     ..    ..
 .     .       .          
 1     1       2     ..    ..
 .     .       .         
 2     1       1     ..    ..

I tried using the reshape function. But I had problems with changing his time and over the parties at the same time.

Here is a small example of data.frame.

data <- data.frame(matrix(rnorm(10),2,10))  
data[,1] <- 1:2  
names(data) <- c("ID","KP1_430a" , "KP1_430b" , "KP1_430c" , "KP2_430a" , "KP2_430b ", "KP2_430c ", "KP1_1500a" ,"KP1_1500b", "KP1_1500c")

And this is how far I got.

  data_long <- reshape(data,varying=list(names(data)[2:4],names(data)[5:7], names(data[8:10]),  
                            v.names=c("KP1_430","KP2_430","KP1_1500"),  
                           direction="long", timevar="Party")

: ? ? ( () [2: 4]) . data.frame , .

EDIT: : , . -, Bind KP1_430a KP1_1500a , Time = 1 Party = 1. - [b-f], -. [2-7], , .

+5
2

: melt, "" ( ), dcast ti .

library(reshape2)
library(stringr)

# Tall format
d <- melt(data, id.vars="ID")

# Process the column containing wave and party
d1 <- str_match_all( 
  as.character( d$variable ), 
  "KP([0-9])_([0-9]+)([a-z])" 
)
d1 <- do.call( rbind, d1 )
d1 <- d1[,-1]
colnames(d1) <- c("wave", "number", "party")
d1 <- as.data.frame( d1)
d <- cbind( d, d1 )

# Convert to the desired format
d <- dcast( d, ID + wave + party ~ number )
+4

Wave , . .

mdat <- melt(data, id.vars="ID")
mdat$wave=sub("KP", "", sub("_.+$", "", mdat$variable)) # remove the other stuff
mdat

() , "", , , , , ... , .

EDIT: , , :

mdat$var <- sub("\\s", "", (as.character(mdat$variable)))
mdat$party=substr( mdat$var, nchar(mdat$var), nchar(mdat$var))
#--------------
> mdat
   ID  variable      value wave party       var
1   1  KP1_430a  0.7220627    1     a  KP1_430a
2   2  KP1_430a  0.9585243    1     a  KP1_430a
3   1  KP1_430b -1.2954671    1     b  KP1_430b
4   2  KP1_430b  0.3393617    1     b  KP1_430b
5   1  KP1_430c -1.1477627    1     c  KP1_430c
6   2  KP1_430c -1.0909179    1     c  KP1_430c
<snipped output>
0

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