At 6:23 PM -0400 29/9/04, Greg wrote:
To: Revolution <[EMAIL PROTECTED]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=US-ASCII; format=flowed
Hello everyone,
In doing some statistical work, it occurred to me that Revolution's arrays would be greatly enhanced if we could access sub-arrays just like we can with itemized and line-delimited lists.
For example, in a comma-delimited list of the natural numbers, 1 to 10, we can compute the average of any subset of the numbers using the average() function:
put "1,2,3,4,5,6,7,8,9,10" into x put average(item 1 to 4 of x) && \ average(x) && \ average(item 1 to 8 of x) --yields 2.5, 5.5 and 4.5.
But as far as I know, we cannot refer to element 1 to 4 of array x, and we can only take the average of all the values in x to get 5.5 as below.
multiply t by 0 repeat 10 times add 1 to t put t into x[t] end repeat put average(x) -- yields 5.5
Greg
-- Michael J. Lew
Senior Lecturer Department of Pharmacology The University of Melbourne Parkville 3010 Victoria Australia
Phone +613 8344 8304
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