secd
secd(X) returns secant of angle in degrees for each element of X.
Examples
> x = (-85:2.5:85)'; x1 = x + 180 [x:69x1 double] [x1:69x1 double] > plot([x x1], [secd(x) secd(x1)], struct('colors', {'blue'})) [ans:1x1 struct]
> x = (-85:2.5:85)'; x1 = x + 180 [x:69x1 double] [x1:69x1 double] > plot([x x1], [secd(x) secd(x1)], struct('colors', {'blue'})) [ans:1x1 struct]