has = function(str) {
        return ticklabelposition.indexOf(str) !== -1;
    }
Make axis tick label x, y and anchor functions

@param {object} ax (full) axis object
 - {string} _id
 - {string} ticks
 - {number} ticklen
 - {string} side
 - {number} linewidth
 - {number} tickfont.size
 - {boolean} showline
@param {number} shift
@param {number} angle [in degrees] ...
@return {object}
 - {fn} xFn
 - {fn} yFn
 - {fn} anchorFn
 - {fn} heightFn
 - {number} labelStandoff (gap parallel to ticks)
 - {number} labelShift (gap perpendicular to ticks)