Dear J Language
Raul's is what you want if you're happy with
an explicit answer. However, if by "tactic"
you mean "tacit" then this might be what you
want.
NB. Given
open =: 100 101 103 104 103 102
close =: 101 100 104 104 105 103
NB. make a 2-row matrix using ,: "laminate"
open (,:)close
100 101 103 104 103 102
101 100 104 104 105 103
NB. study use of u/. "oblique" ...
open (%//.@:,:)close
100 1 1.03 1 0.990385 0.971429 103
NB. clean up ends if you need to ...
open ([EMAIL PROTECTED]:@(%//.@:,:))close
1 1.03 1 0.990385 0.971429
NB. If the quotes are columns in a table,
NB. eg (for your example) ...
tab=:(open,.close)1 4}"1(100+?6 5$ 6)
NB. you can do this sort of thing...
([EMAIL PROTECTED]:@(%//.)@:|:)1 4 {"1 tab
1 1.03 1 0.990385 0.971429
Mike
Raul Miller wrote:
On 6/7/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Given:
open =: 100 101 103 104 103 102
close =: 101 100 104 104 105 103
how about
+/ open(index+1) % close(index)
Perhaps you mean
+/ (}.open) % }:close
?
If not, could you specify more precisely what it is that
you mean?
Thanks,
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