t = table(1..10 as x, 1 1 1 1 2 2 2 2 2 2 as z, rand(1.0, 10) as y1, rand(1.0, 10) as y2, rand(1.0,10) as y3)
each(f->corr:R(f.x, f[`y1`y2`y3]), t @ groups(t.z, 'tuple'))
可以参考上述脚本,groups 会返回各分对应元素的下标,并以元组返回,@ 即 eachAt 可取出元组的每个元素,即一组元素的下标,然后通过索引取出表中对应下标的记录,然后调用自定义的lambda 函数,取处需要计算相关系数的列,对应 y1y2y3 分别和 x 列进行相关系数的求值