A coding question
M.Newman at RBGE.ORG.UK
Wed Mar 26 09:23:08 CET 1997
With respect to the question below, I don't know a clever way round the
situation but I can think of a very simple one. Why not add two more
states to character 115, as follows:
#115. mesocarp <occurrence>/
3. not verifiable, layers separating
4. not verifiable, layers not separating
and a dependency relationship 115,3/4:143:144. This will allow your data
base to work properly and, once you get enough material of the three
rare genera to score them, you can remove states 115,3 and 115,4.
I should point out that I use DELTA with PANKEY programs. Perhaps what
I've said won't work with CONFOR/INTKEY.
Best wishes, Mark
> The fruit wall is made up of three layers: epicarp, mesocarp, and
> endocarp. The presence or absence of these layers and their fusion or
> separation are useful characteristics. So, we have the following three
> #115. mesocarp <occurrence>/
> 1. present/
> 2. absent/
> #143. endocarp <fused to or separating from epicarp and mesocarp>/
> 1. remaining fused to mesocarp and epicarp <IMPLICIT>/
> 2. separating from mesocarp/
> 3. separating with mesocarp from epicarp/
> #144. endocarp <fused to or separating from epicarp when mesocarp
> 1. remaining fused to epicarp/
> 2. separating from epicarp/
> When the mesocarp is present (115,1), 143 is used for the fusion or
> separation of the epicarp, mesocarp, and endocarp. When the mesocarp
> is absent (115,2), 144 is used for the fusion or separation of the
> epicarp and endocarp.
> When I established the dependencies 115,1:144 and 115,2:143, three
> genera are reported as "Controlling character not coded. ... 115:143".
> All three genera are in the same situation; character 115 is coded as
> 115,U. These are very rare genera with very few fruits. To determine
> the presence or absence of the mesocarp, a fruit valve must be cut or
> broken to examine the layers. For these three genera, we do not have
> valves that we can cut or break. It is obvious that the layers are not
> separating, but we do not know if the mesocarp is present or absent.
> For the database to give the best results, the dependencies 115,1:144
> and 115,2:143 should be in operation, but because of the three unknown
> genera, it will not function with the dependencies in place. Does
> anyone reading DELTA-L have a clever work around for this situation?
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