| Easiest way to do it without special macros that I can think of is to sort the information, then make a cell that is =average( select the yields that you want)
Code | CORNYF1 | Average | 2004-09-15 | 218.5 |
| 2004-09-16 | 216.25 |
| 2004-09-17 | 215.25 |
| 2004-09-20 | 212.75 |
| 2004-09-21 | 212.75 |
| 2004-09-22 | 210.25 |
| 2004-09-23 | 207.75 |
| 2004-09-24 | 205.25 |
| 2004-09-27 | 207.75 |
| 2004-09-28 | 208.5 |
| 2004-09-29 | 207.25 |
| 2004-09-30 | 205.5 | 210.6458333333 | 2004-10-01 | 206 |
| 2004-10-04 | 202.75 |
| 2004-10-05 | 204.5 |
| 2004-10-06 | 207.25 |
| 2004-10-07 | 206 |
| 2004-10-08 | 204.5 |
| 2004-10-11 | 204.75 |
| 2004-10-12 | 202.5 |
| 2004-10-13 | 205.25 |
| 2004-10-14 | 204.25 |
| 2004-10-15 | 206.75 |
| 2004-10-18 | 204 |
| 2004-10-19 | 207 |
| 2004-10-20 | 206 |
| 2004-10-21 | 204.25 |
| 2004-10-22 | 201.75 |
| 2004-10-25 | 205.25 |
| 2004-10-26 | 206.75 |
| 2004-10-27 | 206.25 |
| 2004-10-28 | 206.25 |
| 2004-10-29 | 202.5 | 204.9761904762 | 2004-11-01 | 200 |
| 2004-11-02 | 199.75 |
| 2004-11-03 | 199 |
| 2004-11-04 | 197.5 |
| 2004-11-05 | 199.5 |
| 2004-11-08 | 198 |
| 2004-11-09 | 198 |
| 2004-11-10 | 198.25 |
| 2004-11-11 | 197.25 |
| 2004-11-12 | 200 |
| 2004-11-15 | 202.5 |
| 2004-11-16 | 203 |
| 2004-11-17 | 205.75 |
| 2004-11-18 | 204 |
| 2004-11-19 | 199.25 |
| 2004-11-22 | 197.5 |
| 2004-11-23 | 198 |
| 2004-11-24 | 197.75 |
| 2004-11-25 | 197.75 |
| 2004-11-26 | 197 |
| 2004-11-29 | 193.25 |
| 2004-11-30 | 192.5 | 198.8863636364 | 2004-12-01 | 191.5 |
| 2004-12-02 | 192.5 |
| 2004-12-03 | 196.25 |
| 2004-12-06 | 197.75 |
| 2004-12-07 | 193.75 |
| 2004-12-08 | 195.5 |
| 2004-12-09 | 194.75 |
| 2004-12-10 | 193.5 |
| 2004-12-13 | 197.25 |
| 2004-12-14 | 195 |
| 2004-12-15 | 205 |
| 2004-12-16 | 203.5 |
| 2004-12-17 | 204.5 |
| 2004-12-20 | 206.5 |
| 2004-12-21 | 205.75 |
| 2004-12-22 | 205.5 |
| 2004-12-23 | 207 |
| 2004-12-24 | 207 |
| 2004-12-27 | 207.5 |
| 2004-12-28 | 207 |
| 2004-12-29 | 203.25 |
| 2004-12-30 | 204.75 |
| 2004-12-31 | 204.75 | 200.8586956522 | 2005-01-03 | 201.75 |
| 2005-01-04 | 201 |
| 2005-01-05 | 201.5 |
| 2005-01-06 | 208.75 |
| 2005-01-07 | 206.75 |
| 2005-01-10 | 206.75 |
| 2005-01-11 | 206.75 |
| 2005-01-12 | 200.5 |
| 2005-01-13 | 200 |
| 2005-01-14 | 197.25 |
| 2005-01-17 | 197.25 |
| 2005-01-18 | 196 |
| 2005-01-19 | 196.75 |
| 2005-01-20 | 197.75 |
| 2005-01-21 | 197 |
| 2005-01-24 | 197.75 |
| 2005-01-25 | 199 |
| 2005-01-26 | 198.75 |
| 2005-01-27 | 195.75 |
| 2005-01-28 | 195.75 |
| 2005-01-31 | 197 | 199.9880952381 | |