CHD Command is SLOW...How can I speed up processing

I have the following loop in a Diadem Script...Any thoughts on how to make it run FASTER...A channel with "only" 13792 elements is taking over 20 seconds to process...and I have to repeat this three times..
For Counter = 1 to ArrayLength
   if CHD(Counter, "/EP_HP") > BlowerLow then
      CHD(Counter, "/EP_HP (Low)") = BlowerOff
   else
      CHD(Counter, "/EP_HP (Low)") = CHD(Counter, "/EP_HP")
   end if
Next
Any insight would be appreciated.

Hello Jeff!
The approach with a loop is obvious but slow. You can speed it up with the faster CHDX command and disolve the channel names to channel numbers with CNO in front of the loop.
The realy fast solution is done with the FormulaCalc command. Please set the DIAdem Variable R1 to the BlowerLow value and R2 to the BlowerOff value and than run this line:
Call FormulaCalc("Ch('EP_HP (Low)') := (Ch('EP_HP') > R1) * Ch('EP_HP') + (Ch('EP_HP') <= R1) * R2")
The clue is that a true condition is evaluated to 1 a false to 0. With the multiplication and the to opposit conditions you get the two different values. DIAdem process this verry fast!
Matthias
Matthias Alleweldt
Project Engineer / Projektingenieur
Twigeater?

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