convertIncrement: Convert size increment according to time elapsed between...
In wpetry/IPMpack2: Builds and analyses Integral Projection Models (IPMs).
convertIncrement R Documentation
Convert size increment according to time elapsed between censuses.
Description
Adjusts the intervals of census data that is not annual to report output on population dynamics on an annual basis.
Usage
convertIncrement(dataf, nYrs = 1)
Arguments
dataf
a dataframe with columns ‘size’ ‘sizeNext’, ‘exactDate’, ‘exactDateNext’.
nYrs
the number of years between sequential measurements (i.e. if census
interval is 5, nYrs = 5, if census interval is 3 times a year, nYrs = 0.333).
Details
In some data sets the time interval between census measurements can be different than one year. In some species demographic information is recorded several times within a year, while in others, particularly in "slow-living" species (e.g. trees) the census frequency is greater than one year and/or vary across intervals. This function takes a data frame dataf and uses columns with the term extractData to adjust the size increment to the number of years given in nyears. It defaults to annual.
Value
Returns the adjusted increments.
Author(s)
C. Jessica E. Metcalf, Sean M. McMahon, Roberto Salguero-Gomez, Eelke Jongejans & Cory Merow.
References
Sampling three times/year (nYrs = 0.333): Smith, Caswell & Mettler-Cherry. Stochastic flood and precipitation regimes and the population dynamics of a threatened floodplain plant. Ecological Applications 15, p1036-1052.
Sampling every five years (nYrs = 5): van Mantgem & Stepheson. 2005. The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California. Journal of Ecology 93, p737-747.
wpetry/IPMpack2 documentation built on Sept. 29, 2022, 9:41 a.m.
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| convertIncrement | R Documentation |
Convert size increment according to time elapsed between censuses.
Description
Adjusts the intervals of census data that is not annual to report output on population dynamics on an annual basis.
Usage
convertIncrement(dataf, nYrs = 1)
Arguments
dataf |
a dataframe with columns ‘size’ ‘sizeNext’, ‘exactDate’, ‘exactDateNext’. |
nYrs |
the number of years between sequential measurements (i.e. if census interval is 5, nYrs = 5, if census interval is 3 times a year, nYrs = 0.333). |
Details
In some data sets the time interval between census measurements can be different than one year. In some species demographic information is recorded several times within a year, while in others, particularly in "slow-living" species (e.g. trees) the census frequency is greater than one year and/or vary across intervals. This function takes a data frame dataf and uses columns with the term extractData to adjust the size increment to the number of years given in nyears. It defaults to annual.
Value
Returns the adjusted increments.
Author(s)
C. Jessica E. Metcalf, Sean M. McMahon, Roberto Salguero-Gomez, Eelke Jongejans & Cory Merow.
References
Sampling three times/year (nYrs = 0.333): Smith, Caswell & Mettler-Cherry. Stochastic flood and precipitation regimes and the population dynamics of a threatened floodplain plant. Ecological Applications 15, p1036-1052.
Sampling every five years (nYrs = 5): van Mantgem & Stepheson. 2005. The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California. Journal of Ecology 93, p737-747.
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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