cdt.sp | R Documentation |
Compute derived traits for a given fieldbook data frame.
cdt.sp(dfr, method = c("none", "ps", "np"), value = NULL, nops = NULL)
dfr |
The name of the data frame. |
method |
Method to scale data from plot to hectare level. Options are
plot size |
value |
Value for the method selected in square meters if |
nops |
Number of plants sowed per plot. |
The data frame must use the labels (lower or upper case) listed in
function check.names.sp
.
Conversion from kilograms per plot to tons per hectare can be done using
ps
, the plot size, or np
, the total number of plants that can be
allocated in a full hectare. In both cases computations can be adjusted by the
number of harvested plants if available in the fieldbook. For method = "np"
,
nops
must be specified to compute non adjusted values.
It returns a data frame with the original and derived traits.
Raul Eyzaguirre.
cdt.sp(pjpz09)
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