range r1 = wks2!col("column1");
range r2 = wks1!col(A); 
range r3 = wks1!col("Column2");
dataset ds;
dataset ds1;
ds.SetSize(r2.nrows);
ds1.SetSize(r2.nrows);
for (int i = 1; i <= r2.nrows; i++) {
	int idx = 1;
	for (int j = 1; j <= r1.nrows; j++) {
		if (abs(r2[i] - r1[j]) < abs(r2[i] - r1[idx])) {
			idx = j;
		}
	}
	ds[i] = idx;
	
	int start = idx - 4;
	start = start > 0 ? start : 1;
	int end = idx + 4;
	end = end < r3.nrows ? end : r3.nrows;
	range rtmp = wks1!col("Column2")[$(start):$(end)];
	ds1[i] = max(rtmp);
}
range r4 = wks1!col(C); 
r4 = ds;
range r5 = wks1!col(D);
r5 = ds1;