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how to use _EXTRA convention [message #13113]

Fri, 09 October 1998 00:00

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Messages: 21
Registered: November 1997

Junior Member

I'm a little confused about the _EXTRA convention for passing
parameters to a function works. I'm writing a routine to use with
mpfit (thanks to Craig B. Markwardt), and I want to pass in some extra
arguments via the functargs command. The mpfit procedure calls the
function that I specify like this:

fp = call_function(fcn, xp, _EXTRA=fcnargs)

So, if fcnargs = { X: Xvals, Y: Yvals, Err:Evals, D:dval, G:gval }

then do I define my function like this:

function myfunct, P, X=x, Y=y, Err=err, D=d, G=g

or like this:

function myfunct, P, _EXTRA=e
x = e.X
y = e.Y
err = e.Err
d = e.D
g = e.G

Or something else entirely?

thanks,
scott

--
Scott Stuart
stuart at ll mit edu

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