Nothing
is.numsca <- function(x) is.numeric(x) & (length(x) == 1)
is.numint <- function(x) is.integer(x) & (length(x) == 1)
is.numvec <- function(x) is.vector(x) & is.numeric(x)
is.nummat <- function(x) is.matrix(x) & is.numeric(x)
is.samelength <- function(x,y){
if(is.nummat(x) & is.nummat(y))
return(all(dim(x)==dim(y)))
if(is.numvec(x) & is.nummat(y))
return(length(x) == dim(y)[1])
if(is.nummat(x) & is.numvec(y))
return(dim(x)[1] == length(y))
if(is.numvec(x) & is.numvec(y))
return(length(x) == length(y))
return(FALSE)
}
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