Name (or tag if name is empty) of the point the y-coordinate is wanted from
Name of the created calculation (the y-coordinate measure))
Optionalrep?: stringtag of the frame (system of coordinates), mandatory only if the figure contains several frames
the created measure
Adds the y-coordinate measure of point a in frame rep (system of coordinates) syntaxes
addYMeasure(a, nameCalc) and addYMeasure(a, nameCalc, rep)are allowed too