cdt: Compute derived traits

Description Usage Arguments Details Value Author(s) Examples

View source: R/cdt.R

Description

Compute derived traits for a given fieldbook data frame.

Usage

1
cdt(dfr, method = c("none", "ps", "np"), value = NULL, nops = NULL)

Arguments

dfr

The name of the data frame.

method

Method to scale data from plot to hectare level. Options are plot size "ps" and number of plants for a full hectare "np". See details.

value

Value for the method selected in square meters if method = "ps" and in number of plants per hectare if method = "np".

nops

Number of plants sowed per plot.

Details

The data frame must use the labels (lower or upper case) listed in function check.names. See ?check.names for details.

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 are expected to 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.

Value

It returns a data frame with the original and derived traits.

Author(s)

Raul Eyzaguirre.

Examples

1

reyzaguirre/st4gi documentation built on Oct. 7, 2018, 11:05 a.m.