eval

[futurenets]

is it feasible to use eval to create a return in main based on a user parameter?

e.g. this study allows the user to set the number of zone lines and then creates a return value based on this.

Eval.efs

return eval(ret) returns -100 for some reason?

[SteveH]

Yeah, setting up all of those defaults in your main() is a no-no. They belong in the preMain(). Use the askForInput() function to bring up the Edit Studies panel in your preMain() for the dynamic info you need from the user.

[futurenets]

ok thanks SteveH have removed all deaults from main in this version (although they appeared to work ok)

Eval2.efs

but don't appear to be able to use eval to dynamically create a return in main?

[futurenets]

pretty sure now that eval is not the solution. but does anyone know if this can be done and how?

[SteveH]

Paul,

Right, the documentation just states that the default-type functions should be in the preMain(), not that they must. I do know there are some EFS library functions which will appear as formula errors if they're in the main() (but I can't remember ones off the top of my head).

I'll have a go at trying to get your script to work.

[SteveH]

Paul,

I rewrote your script without using eval() in its most basic form. Feel free to embellish it.

[futurenets]

excellent Steve. thank you