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How to sort & compare the coordinates

Bala Sowjanya

Hi,

Can u tell me how to sort the coordinates and compare those in ascending or descending order.

Regards,

Bala.

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  • mbracht

    sort by x in ascending order: myList = (sort myList (lambda (pt1 pt2) (lessp (car pt1) (car pt2))))
    sort by x in descending order: myList = (sort myList (lambda (pt1 pt2) (greaterp (car pt1) (car pt2))))
    sort by y in ascending order: myList = (sort myList (lambda (pt1 pt2) (lessp (cadr pt1) (cadr pt2))))
    sort by y in descending order: myList = (sort myList (lambda (pt1 pt2) (greaterp (cadr pt1) (cadr pt2))))

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  • mbracht

    sort by x in ascending order: myList = (sort myList (lambda (pt1 pt2) (lessp (car pt1) (car pt2))))
    sort by x in descending order: myList = (sort myList (lambda (pt1 pt2) (greaterp (car pt1) (car pt2))))
    sort by y in ascending order: myList = (sort myList (lambda (pt1 pt2) (lessp (cadr pt1) (cadr pt2))))
    sort by y in descending order: myList = (sort myList (lambda (pt1 pt2) (greaterp (cadr pt1) (cadr pt2))))

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