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Convert weights Biotic

Source: R/StoxBaselineFunctions.R
ConvertWeightBiotic.Rd

Convert weights to approximate weight for desired product type. Appropriate when BioticData is read from NMDbiotic.

Usage

ConvertWeightBiotic(
  BioticData,
  ConversionType = c("All", "CatchWeights", "IndividualWeight"),
  WeightConversionTable,
  TargetProductType = character()
)

Arguments

BioticData

BioticData for which weights should be converted

ConversionType

defines which weights to convert, may be 'All', 'CacthWeight', 'SampleWeight', 'IndividualWeight'

WeightConversionTable

WeightConversionTable with parameters for converting weights to 'TargetProductType'.

TargetProductType

The desired producttype. Typically the code for Round fish.

Value

BioticData with converted weights.

Details

Different products of fish may be measured and round weight (live weight) or some other product type may be approximated by multiplying with a scalar conversion factor.

For records where the variable 'catchcategory' on the table 'catchsample' matches the 'Species' variable in 'WeightConversionTable' this function converts weights to desired product type ('TargetProductType') by matching 'producttype'-variables to 'ProductType' in 'WeightConversionTable'. The following weights may be converted, depending on the parameter 'ConversionType':

'All' or 'CatchWeights'

'catchweight' on the table 'catchsample' is converted based on 'catchproducttype'

'All' or 'CatchWeights'

'lengthsampleweight' on the table 'catchsample' is converted based on 'sampleproducttype'

'All' or 'IndividualWeight'

'individualweight' is converted based on 'individualproducttype' both on the table 'individual'

After conversion the 'producttype'-variables will be changed to reflect the converted weight. That is they will be set to 'TargetProductType'.

If 'WeightConversionTable' contains NAs for 'WeightFactor', converted weights will be NA. This may be useful for dealing with species whoose weights are not needed in subsequent analysis.

The variables 'catchvolume', 'lengthsamplevolume', and 'individualvolume' are also dependent on product type. These are set to NA as weight is converted.

These variables are on these tables in data originating from NMDBiotic (http://www.imr.no/formats/nmdbiotic/). For bioticdata that does not conform to this, no modifications are done.

See also

DefineWeightConversionFactor for configuration of weight conversion parameters.