Contour
In this window you can specify that the current contour corresponds to the half of the function period, not to the whole period, and define what to do with the second half.
In this case, you should specify how does the second part of period corresponds to the first part. You can specify one of the following:
Symmetry to the axys X
It means that the values at the second part of the function period can be calculated by the formula f(x+T) = -f(x).Symmetry to the axys Y
It means that the values at the second part of the function period can be calculated by the formula f(-x) = f(x).Symmetry to the point 0
It means that the values at the second part of the function period can be calculated by the formula f(-x) = -f(x).
Each time you choose one of these options, harmonics are recalculated and displayed in the main add-in window. You can press Cancel any time to close the window and to return to original settings.
See also
Harmonic Analysis Add-in