Hi,

I created an harmonic with the following command:

a1=sin(pi*time)

where time is a trend series. I expected a zero vector,

but the program returns something which is very close to

zero but not exactly, as shown in the tabulation

Obs b2

1981:1 1.22461e-016

1981:2 -2.44921e-016

1981:3 3.67382e-016

...

and in the graph, which is not a straight line at y=0.

I understand this is due to the numerical accuracy at which the
program works,

but I wonder if it's possible to set an option to show 0 whenever

values are lower than a fixed level (say 10^-5).

Thanks,

Marco Marini

Istat