can you be a bit more specifi? what number? how does it change?
Do u mean the differenciation operation??
if yes try to do this way.
do 10000 times.
calculate the change over the dependent variable in small intervals.
of independent variable.
dz = dz+ (d2-d1 ) " accumulate values
enddo.
dz = dz/10000. " divide by the number of times.
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