Question:We have more than one sample per tree. Sometimes, up to four. We would like to use the reference curve function for each tree and then for all trees. Is that possible? How could we do that?
If you have measured several radii from a tree, then you should have ONE radius in each .pos file.
See that you name them like NM002A.pos, NM002B.pos, NM002C.pos etc.
I.e. A,B,C stands for the different radii and that letter is preceded by a number (002) which is specific for each tree.
(So the first radius of the next tree is named NM003A)
Check the radii from one tree towards each other and add them to a separate collection in CDendro.
You may save that collection as e.g. NM002.fil.
Do the same operation also with the measured radii from your other trees, so you get NM002.fil, NM003.fil etc
You can then add all these collections together into a new collection e.g. NM.fil
(Use Collections/Add to this collection)
When you create a sum out of such a collection, the data from each tree will be calculated as a mean value and then all the
trees will be summed together to make a total mean value. (Sum by stem should then be checked!)
This works so, when you have used that naming convention described above (NM002A, NM002B etc.)
as CDendro then understands which radii are from the same tree.
Note: Under the heading "Using CDendro" there is a section "Multi-radii collections" at http://www.cybis.se/forfun/dendro