yuck, the indentation got clobbered, and the underscores turned into font changes. in the groupby, use \(a,x)(b,y) instead of what you see there. in the original I had underscores for x and y but they melted. x and y work fine, they just get ignored. also you may have to fix the indentation to get the thing to parse.
Anonymous - 2008-03-11 07:02:41
yuck, the indentation got clobbered, and the underscores turned into font changes. in the groupby, use \(a,x)(b,y) instead of what you see there. in the original I had underscores for x and y but they melted. x and y work fine, they just get ignored. also you may have to fix the indentation to get the thing to parse.