写一段sas代码用来实现插值法
时间: 2023-03-11 17:08:46 浏览: 98
data interpolation;
set example;
array x{5} x1-x5;
array y{5} y1-y5;
array a{4} a1-a4;
do i=1 to 4;
a{i}=(y{i+1}-y{i})/(x{i+1}-x{i});
end;
do j=1 to 5;
if x{j}<=x<x{j+1} then
y=a{j}*(x-x{j})+y{j};
end;
run;