Possibly a missing line in REI_Correspondence_Word_Plot.R

On the line 115:

``` R
plot(mca$row$coord, type="n", xaxt="n", yaxt="n", xlab="", ylab="")
title("@REI Correspondence Analysis of tweet words", cex.main=1)
for (i in 1:k)
{
   tmp <- clusters == i
   text(mca$row$coord[tmp,1], mca$row$coord[tmp,2],
        labels=rownames(m1)[tmp], cex=wcex[tmp],
        col=gcols[i])
}
```

The `mca` object is not defined.
