Returns the total number of overlay foci in a Window.
Optional. Window reference. Defaults to current Window.
An integer, the total number of overlays (foci) in a Window.
W1: integ(gnorm(1000, 1))
W2: integ(gnorm(1000, 1))
W3: W1;overplot(w2, lred)
W4: W1;overlay(w2, lred)
f1 = numfocus(w3);
f2 = numfocus(w4);
f1 == 1
f2 == 2
W3 contains a series and an overplot. W4 contains a series and an overlay. Although W3 contains two series, there is only one focus, i.e. no overlay so
See OVERLAY, OVERPLOT and STRIPCHART for methods to plot multiple series in a single window.