Nothing
hadamard.prod <- function( x, y )
{
###
### this function calculates the Hadamard product of two matrices x and y.
### the matrices must the same row and column order
###
### Parameters
### x = a numeric matrix object
### y = a numeric matrix object
###
if ( !is.numeric( x ) ) {
stop( "argument x is not numeric" )
}
if ( !is.numeric( y ) ) {
stop( "argument y is not numeric" )
}
if ( is.matrix( x ) ) {
Xmat <- x
}
else {
if ( is.vector( x ) ) {
Xmat <- matrix( x, nrow=length(x), ncol=1 )
}
else {
stop( "argument x is neither a matrix or a vector" )
}
}
if ( is.matrix( y ) ) {
Ymat <- y
}
else {
if ( is.vector( y ) ) {
Ymat <- matrix( y, nrow=length(x), ncol=1 )
}
else {
stop( "argument x is neither a matrix or a vector" )
}
}
if ( nrow( Xmat ) != nrow( Ymat ) )
stop( "argumentx x and y do not have the same row order" )
if ( ncol( Xmat ) != ncol( Ymat ) )
stop( "arguments x and y do not have the same column order" )
return( Xmat * Ymat )
}
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