by osknows » Thu Feb 16, 2012 3:36 am
Hi Ian,
It's possible to use TREND to complete missing values but there are 2 issues I can think of
1. Organising the data. I don't think the TREND function likes gaps in the known data. The data needs to be sorted into contiguous range of known data and unknown data.
2. TREND will produce a value based on the known data. Whether that value has any significance is unknown using TREND alone.