Given X and Y with values taken from the set 'A', 'B', 'C', 'D'.
I need to compute the larger of the two values (larger with respect
to their position in ascii or ebcdic).
In other words X >. Y
However >. doesnt work with characters.
Thus I use an expression similar to:
a.{~>. & (a.i.])
In 64 bit J this expression needs around 25M for a character vector of
length 1e6:
GTE =: a. {~ >. & (a. i. ])
char1 =: a. {~ num1 =: [EMAIL PROTECTED]
char2 =: a. {~ num2 =: [EMAIL PROTECTED]
7!:5<'num1'
8388608
7!:5<'char1'
1048576
7!:2 'char2 GTE char1'
25167872
7!:2 'num2 >. num1'
8390272
Is there an alternative, or is there a form of the expression that
would use special code?
Perhaps there is an argument to !. such that when applied to >. would
extend its domain? (Something like >.!.<a.)
David
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