diet	age	ht
1	0.2	54.0
1	0.5	54.3
1	0.8	63.0
1	1.0	66.0
1	1.0	69.0
1	1.4	73.0
1	1.8	82.0
1	2.0	83.0
1	2.0	80.3
1	2.5	91.0
1	2.5	93.2
1	3.0	94.0
1	2.7	94.0
2	0.4	52.0
2	0.7	55.0
2	1.0	61.0
2	1.0	63.5
2	1.5	66.0
2	2.0	68.5
2	2.0	67.9
2	2.4	72.0
2	2.8	76.0
2	3.0	74.0
2	1.3	65.0
2	1.8	69.0
2	0.2	51.0
2	3.0	77.0