memisc (version 0.97)

collect: Collect Objects

Description

collect gathers several objects into one, matching the elements or subsets of the objects by names or dimnames.

Usage

collect(...,names=NULL,inclusive=TRUE)
## S3 method for class 'default':
collect(\dots,names=NULL,inclusive=TRUE)
## S3 method for class 'array':
collect(\dots,names=NULL,inclusive=TRUE)
## S3 method for class 'matrix':
collect(\dots,names=NULL,inclusive=TRUE)
## S3 method for class 'table':
collect(\dots,names=NULL,sourcename="arg",fill=0)
## S3 method for class 'data.frame':
collect(\dots,names=NULL,inclusive=TRUE,
                                  fussy=FALSE,warn=TRUE,sourcename="arg")
## S3 method for class 'data.set':
collect(\dots,names=NULL,inclusive=TRUE,
                                  fussy=FALSE,warn=TRUE,sourcename="arg")

Arguments

...

more atomic vectors, arrays, matrices, tables, data.frames or data.sets

names

optional character vector; in case of the default and array methods, giving dimnames for the new dimension that identifies the collected objects; in case of the data.frame and data.set methods,

inclusive

logical, defaults to TRUE; should unmatched elements included? See details below.

fussy

logical, defaults to FALSE; should it count as an error, if variables with same names of collected data.frames/data.sets have different attributes?

warn

logical, defaults to TRUE; should an warning be given, if variables with same names of collected data.frames/data.sets have different attributes?

sourcename

name of the factor that identifies the collected data.frames or data.sets

fill

numeric; with what to fill empty table cells, defaults to zero, assuming the table contains counts

Value

• If x and all following ...arguments are vectors of the same mode (numeric,character, or logical) the result is a matrix with as many columns as vectors. If argument inclusive is TRUE, then the number of rows equals the number of names that appear at least once in each of the vector names and the matrix is filled with NA where necessary, otherwise the number of rows equals the number of names that are present in all vector names.

  If x and all ...arguments are matrices or arrays of the same mode (numeric,character, or logical) and $n$ dimension the result will be a $n+1$ dimensional array or table. The extend of the $n+1$th dimension equals the number of matrix, array or table arguments, the extends of the lower dimension depends on the inclusive argument: either they equal to the number of dimnames that appear at least once for each given dimension and the array is filled with NA where necessary, or they equal to the number of dimnames that appear in all arguments for each given dimension.

  If x and all ...arguments are tables then the result will be a table. The result

  If x and all ...arguments are data frames or data sets, the result is a data frame or data set. The number of variables of the resulting data frame or data set depends on the inclusive argument. If it is true, the number of variables equals the number of variables that appear in each of the arguments at least once and variables are filled with NA where necessary, otherwise the number of variables equals the number of variables that are present in all arguments.

Examples

x <- c(a=1,b=2)
y <- c(a=10,c=30)

x
y

collect(x,y)
collect(x,y,inclusive=FALSE)

X <- matrix(1,nrow=2,ncol=2,dimnames=list(letters[1:2],LETTERS[1:2]))
Y <- matrix(2,nrow=3,ncol=2,dimnames=list(letters[1:3],LETTERS[1:2]))
Z <- matrix(3,nrow=2,ncol=3,dimnames=list(letters[1:2],LETTERS[1:3]))

X
Y
Z

collect(X,Y,Z)
collect(X,Y,Z,inclusive=FALSE)

X <- matrix(1,nrow=2,ncol=2,dimnames=list(a=letters[1:2],b=LETTERS[1:2]))
Y <- matrix(2,nrow=3,ncol=2,dimnames=list(a=letters[1:3],c=LETTERS[1:2]))
Z <- matrix(3,nrow=2,ncol=3,dimnames=list(a=letters[1:2],c=LETTERS[1:3]))

collect(X,Y,Z)
collect(X,Y,Z,inclusive=FALSE)

df1 <- data.frame(a=rep(1,5),b=rep(1,5))
df2 <- data.frame(a=rep(2,5),b=rep(2,5),c=rep(2,5))
collect(df1,df2)
collect(df1,df2,inclusive=FALSE)

data(UCBAdmissions)
Male <- as.table(UCBAdmissions[,1,])
Female <- as.table(UCBAdmissions[,2,])
collect(Male,Female,sourcename="Gender")
collect(unclass(Male),unclass(Female))

Male1 <- as.table(UCBAdmissions[,1,-1])
Female2 <- as.table(UCBAdmissions[,2,-2])
Female3 <- as.table(UCBAdmissions[,2,-3])
collect(Male=Male1,Female=Female2,sourcename="Gender")
collect(Male=Male1,Female=Female3,sourcename="Gender")
collect(Male=Male1,Female=Female3,sourcename="Gender",fill=NA)

f1 <- gl(3,5,labels=letters[1:3])
f2 <- gl(3,6,labels=letters[1:3])
collect(f1=table(f1),f2=table(f2))