HP49-50G plotting of sum(x=0 to 0, 1, 2,...10, of x!/(2x)!)

[Gil]

There was first a name collision with my variable name of the first function F1 with an HP49-HP50 command.

I corrected this, but then nothing appeared, if I remember correctly, when running the FresnelC function/program in the same directory as the previous function function F1.

But it worked when FresnelC function/program copied in another directory.

And now, as I mentioned, both seem to work nicely in the same directory.

I saved previously your model program.

Thanks again for your replies.

I use only the EMU48, having lost years ago my real my HP50G calculator.
I bought a new one 2 months ago for 80$, but I don't use it at all (much to slow, about 100×, in comparison to the phone Android application, and not practical to import data from Internet or export them).