twoway_scatteri_parse.class

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//                                 twoway_scatteri_parse
//
//   A parser for adding a immediate points/scatters.  Works with twoway.ado.

*! version 1.0.0  23oct2002

version 8

class {
	ptlist = ""
} , inherit(twoway_bar_parse)


// ---------------------------------------------------------------------------

program parse
	.must_create_serset = 1

	.viewtype = "scatter"
	.allow_anything = 1				// side signal
	.n = 1						// number of plots

	.Super.parse `0'

	if `"`.wtype'"' != "" {
		di as error "weights not allowed"
		exit 198
	}


							// process points
	local pts `"`.anything'"'
	gettoken y pts : pts
	gettoken x pts : pts

	while `"`x'"' != `""' {
								// x-y point
		capture numlist "`x' `y'" , max(2) min(2) missingok
		if _rc {
			di as error `"invalid point, `x' `y'"'
			exit 198
		}
							// optional position
		gettoken pos pts : pts , match(pfnd) quotes
		if "`pfnd'" != "" {
			capture numlist "`pos'" , max(1) min(1) range(>=0 <=12)
			if _rc {
				di as error `"invalid position, `pos'"'
				exit 198
			}
			gettoken txtq pts : pts , quotes
			.posnm = "position"
		}
		else {
			local txtq `"`pos'"'
			local pos .
		}

		gettoken txt : txtq			// optional text label
		if `"`txt'"' == `"`txtq'"' {
			local ynxt `txt'
			local txt
		}
		else {
			.labvars[1] = "label"
			gettoken ynxt pts : pts
		}

		local ptlist `"`ptlist' `"`y' `x' "`pos'" `"`txt'"'"'"'

		local    y `"`ynxt'"'
		gettoken x pts : pts
	}

	.ptlist = `"`ptlist'"'
end


/* -------------------------------------------------------------------------*/
/*
	Creates a new serset and the view and returns its reference.
	Assumes that the data in memory is the same as when parse was called.

	Allows a touse(varname) option that further restricts the sample, 
	restricts beyond the held .if and .in

	Additional options to the .serset.new command may be specified, but
	this is unlikely to be necessary.

	If must_create_serset == 1, then this command MUST be used, 
	otherwise the serset may be created by other means.
*/ 

program log_create_serset

	syntax , LOG(name) SERSETNAME(string) [ TOUSE(passthru) * ]

	.varlist = "y x `.posnm' `.labvars[1]'"

	.`log'.Arrpush __NOLOG__ twoway__scatteri_serset `.ptlist' ,	///
		x(x) y(y) pos(`.posnm') lbl(`.labvars[1]')		///
		sersetname(`sersetname')

	.`log'.Arrpush LogMapping .`sersetname'	// make _fr_runlog place 
						// mapping statement into 
						// permanent log.

	.wtype = ""			// so .Super.log_create_view will
	.wtexp = ""			// not try to add weight to serset
end