R/lavpartable.grep.underbrace.R

In TAM: Test Analysis Modules

## File Name: lavpartable.grep.underbrace.R
## File Version: 9.14

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# grep for "__" operator, meaning I01__I10
lavpartable.grep.underbrace <- function( lavpartable, items )
{
    lav2 <- lavpartable
    lav2 <- lav2[ lav2$user !=2, ]
    LL <- nrow(lav2)
    lav2[ lav2$op=="==", "free" ] <- -9
    syn <- NULL

    for (ll in 1:LL){
        lav2.ll <- lav2[ll,]
        if (lav2.ll$op=="~1" ){
            lav2.ll$rhs <- "1"
            lav2.ll$op <- "~"
        }
        ind.ll <- grep( "__", c( lav2.ll$lhs, lav2.ll$rhs  ), fixed=TRUE )
        #****** lhs
        v11 <- v1 <- lav2.ll$lhs
        v10 <- strsplit( v1, "__", fixed=TRUE )[[1]]
        if ( length(v10) > 1 ){
            v11 <- items[ seq( which( items==v10[1] ), which( items==v10[2] )  ) ]
        }
        syn0 <- paste0( v11, " ", lav2.ll$op, " ")
        g1 <- ifelse( lav2.ll$label !="",  paste0( lav2.ll$label, "*" ), "" )
        g1 <- paste0( g1, "",  ifelse( lav2.ll$free==0,  paste0( lav2.ll$ustart, "*" ), "" ) )
        syn0 <- paste0( syn0, g1, "" )
        #******* rhs
        v11 <- v1 <- lav2.ll$rhs
        v10 <- strsplit( v1, "__", fixed=TRUE )[[1]]
        if ( length(v10) > 1 ){
            v11 <- items[ seq( which( items==v10[1] ), which( items==v10[2] )  ) ]
        }
        syn0 <- paste0( syn0, paste0( v11, "\n")    )
        syn0 <- paste0( syn0, collapse="" )
        syn <- paste0( syn, syn0, collapse="")
    }
    return(syn)
}
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