I used "if" to my work because I need to constraint.
i.x) I have some data(CL, CD) each section "r=2.8667, 5.6....61.6333"
These data are 8.(CL1,CD1.....CL8,CD8)
when r are 2.8667,5.6 , CL1,CD1 is used.
when r is 61.6333, CL8,CD8 is used.
I used "if" to constraint so that data used each section.
But It made my work slowly.
So I want to change or improve so that it is fast.
I attaced my files. Please help me. it spend long time....
And I also want to review my work whether it is efficient about my work.