If you use more digits than 4 (like the script uses) you'll see that the values are very close -- both essentially zero being around 1e-16. When you're dealing with numbers in the 0.1 to 100 range or whatever, anything that's a difference that's less than about 1e-8 or so is essentially zero and due to truncation error.
aoamid = (2*0.6*sqrt(1-((0)/4)^2)/(pi^2)+0.6/(8*pi))
aoamid =
0.14545866183459
CLnew = (aoamid+0.01)/(2*sqrt(1-((0)/4)^2)/(pi^2)+1/(8*pi))
CLnew =
0.641248832653383
aoafinal = aoamid - 0.6/m
aoafinal =
3.05311331771918e-16
aoafinal_using4digits = 0.1455 - 0.6 / m
aoafinal_using4digits =
4.13381654106593e-05
aoafinal_fullprecision = 0.14545866183459 - 0.6 / 4.1248832653383
aoafinal_fullprecision =
7.7715611723761e-16
See, the difference is around 1e-16 when using script variables or full precision of about 14 decimal places, but when you use only 4 decimal places, the difference (error) is more, like 1e-5.
