>calculations are done using variables with the screen locked. It takes
>about 5 seconds to execute the handler for 1,000 data points, which I
>think is fine given my primitive scripting skills; but when I increase
>the size of the data set to 5,000, it takes about 160 seconds or 32
times
>longer. Would anyone care to share their thoughts on the exponential
>increase in processing time? (Incidentally, I'm working with a 350 mHz
>iMac, if that is relevant.)
You might try putting the data into an array(accessing elements in an
array should be very fast). If your dealing with a matrix a 2-d array.
For example if I were doing matrix multiplication, the script would be
something like:
function getcolumns tarray
put keys(tarray) into tkeys
repeat for each line i in tkeys
put item 2 of i&comma after maxlist
end repeat
delete last char of maxlist
return max(maxlist)
end getcolumns
function getrows tarray
put keys(tarray) into tkeys
repeat for each line i in tkeys
put item 1 of i&comma after maxlist
end repeat
delete last char of maxlist
return max(maxlist)
end getrows
function matrixmultiplyarray tarray1,tarray2
local tarray3
put getrows(tarray1) into tlines
put getcolumns(tarray2) into titems
put getcolumns(tarray1) into titems2
repeat with i = 1 to tlines
repeat with j = 1 to titems
put 0 into tarray[i,k]
repeat with k = 1 to titems2
add tarray1[i,k] * tarray2[k,j] to tarray3[i,j]
end repeat
end repeat
end repeat
return tarray3
end matrixmultiplyarray
Tuviah
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