Displaying 3 results from an estimated 3 matches for "rubrum".
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quorum
2010 Nov 09
2
new column from column in another df
...cies,phase
Populus tremula,1
Populus tremula,2
Populus tremula,3
Calluna vulgaris,1
Calluna vulgaris,2
Betula alba,1
Betula alba,2
Betula alba,3
Primula veris,1
Primula veris,2
and another df where each species only have one row:
species,growth_form
Populus tremula,tree
Acer platanoides,tree
Ribes rubrum,shrub
Calluna vulgaris,dwarf_shrub
Betula alba,tree
Primula veris,herb
...how can I create a new column in the first data frame where growth form
is picked up from the second data frame (also factors) and entered into all
rows for a species as follows:
species,phase,growth_form
Populus tremula,1,t...
2006 Sep 12
1
Using XY location data to calculate ecological parameters
...compare between
segments of the same transect. Are there any R packages out there
that will allow me make those calculations? To give an idea of my
data, here's a fictional example:
Species X (m) Y(m)
Acer negundo 90.10 -.19
Acer negundo 90.14 -.90
Acer saccharinum 90.25 .54
Acer rubrum 90.89 .21
Acer negundo 91.25 .36
Acer negundo 91.46 -.65
etc.
Thanks.
Jim Milks
2008 Feb 08
1
Can I index a dataframe with a reference from/to a second dataframe?
..."factor"), Sname =
structure(c(15L,
6L, 14L, 29L, 13L, 1L, 8L, 7L, 9L, 23L, 10L, 28L, 11L, 12L,
31L, 30L, 17L, 16L, 4L, 5L, 3L, 25L, 22L, 20L, 24L, 21L,
26L, 27L, 19L, 2L, 18L, 32L, 33L), .Label = c("Abies balsamea",
"Acer pensylvanicum", "Acer rubrum", "Acer saccharum", "Acer
spicatum",
"Amelanchier", "Betula alleghaniensis", "Betula papyrifera",
"Cornus alternifolia", "Cornus canadensis", "Diervilla lonicera",
"Dirca palustris", "...