vrf Max(hold), Min (hold)

Please can anyone help, I've tryed all sorts of ways but lack the
mathmatical programing experiance.
I am looking to create a Max or Min trace using trace data in an array, but
am unable to work out the vee formula syntax.
In basic it would be along the lines of

dim a(601)     ' New trace
dim r(601)     ' Max Hold trace

for c= 1 to 601
     if a(c) >= r(c) then r(c)= a(c)
     if r(c) >= a(c) then r(c)= r(c)
next c

Many Thanks
Paul Rowan
BT Goonhilly SES
Helston
Cornwall
+44 1872 325293
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