WeightDifference {pvldcurve}

Weight Difference

Description

Calculates weight changes between temporally repeated measurements

Usage

WeightDifference(data, sample = "sample",
  fresh.weight = "fresh.weight")

Arguments

data

data frame containing at least a numeric column containing the measured weights (g), ordered chronologically by sample. A column containing the sample IDs is optionally required if several samples were measured.

sample

optional name of the column in data containing the sample ID, default: "sample"

fresh.weight

optional name of the column in data containing the numeric fresh weight (g) values, default: "fresh.weight"

Value

the original data frame extended by a numeric column containing the absolute differences in fresh weight (g) beween the measurements of a sample. The first value of each sample is NA since weight differences are computed from row i and i-1.

Examples

# get example data
df <- leaf_drying_data

# extend df by weight difference
df_with_WD <- WeightDifference(df)