QGIS/resources/function_help/json/$x_at

{
  "function": "$x_at",
  "description": "Retrieves a x coordinate of the current feature's geometry.",
  "arguments": [ {"arg":"i","description":"index of point of a line (indices start at 0; negative values apply from the last index)"}],
  "examples": [ { "expression":"$x_at(1)", "returns":"5"}
  ]
}
Change expression help from free form html files to structured json A new script then parses these json help files into the html help contents, in a standardised manner. Previously, the function help was a bunch of different formats and structures. Now, a custom stylesheet can be applied (and later tweaked!) to format these help. Eg, this commit colors variables and function names in the syntax section for greater readability. 2015-06-11 12:02:27 +10:00			`{`
Clean up and extend expression geometry functions: - New expression functions for area(geom), perimeter(geom), point_n(geom), start_point(geom), end_point(geom), make_point(x,y) - Add new variant to length() function which takes a geometry object, allows for length(geom) evaluation. - Rename x_at, y_at to $x_at, $y_at (alias old names) to reflect that these only work on current feature geometry - Add x(geom), y(geom) functions which return x and y coordinate for point geometries or centroid x/y for non-point geometries (fix #11008) 2015-09-18 05:41:38 +10:00			`"function": "$x_at",`
Change expression help from free form html files to structured json A new script then parses these json help files into the html help contents, in a standardised manner. Previously, the function help was a bunch of different formats and structures. Now, a custom stylesheet can be applied (and later tweaked!) to format these help. Eg, this commit colors variables and function names in the syntax section for greater readability. 2015-06-11 12:02:27 +10:00			`"description": "Retrieves a x coordinate of the current feature's geometry.",`
			`"arguments": [ {"arg":"i","description":"index of point of a line (indices start at 0; negative values apply from the last index)"}],`
Clean up and extend expression geometry functions: - New expression functions for area(geom), perimeter(geom), point_n(geom), start_point(geom), end_point(geom), make_point(x,y) - Add new variant to length() function which takes a geometry object, allows for length(geom) evaluation. - Rename x_at, y_at to $x_at, $y_at (alias old names) to reflect that these only work on current feature geometry - Add x(geom), y(geom) functions which return x and y coordinate for point geometries or centroid x/y for non-point geometries (fix #11008) 2015-09-18 05:41:38 +10:00			`"examples": [ { "expression":"$x_at(1)", "returns":"5"}`
Change expression help from free form html files to structured json A new script then parses these json help files into the html help contents, in a standardised manner. Previously, the function help was a bunch of different formats and structures. Now, a custom stylesheet can be applied (and later tweaked!) to format these help. Eg, this commit colors variables and function names in the syntax section for greater readability. 2015-06-11 12:02:27 +10:00			`]`
			`}`