Rage: lifetable_convert – R documentation

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lifetable_convert

Convert between age-specific survivorship, survival, or mortality hazard

Description

Convert between vectors of age-specific survivorship (lx), survival probability (px), or mortality hazard (hx). Input vectors must be arranged in order of increasing age, starting with age 0.

Usage

lx_to_px(lx)

lx_to_hx(lx)

px_to_lx(px)

px_to_hx(px)

hx_to_lx(hx)

hx_to_px(hx)

Arguments

`lx`	Vector of age-specific survivorship.
`px`	Vector of age-specific survival probabilities.
`hx`	Vector of age-specific mortality hazards.

Details

lx gives the proportional survivorship to the start of age class x (where survivorship at first age class is defined as 1), px gives the probability of survival between age x and x+1, and hx gives the time-averaged mortality hazard (also called force of mortality) between age x and x+1.

Value

A vector.

Author(s)

Patrick Barks <patrick.barks@gmail.com>

References

Ergon, T., Borgan, Ø., Nater, C. R., & Vindenes, Y. 2018. The utility of mortality hazard rates in population analyses. Methods in Ecology and Evolution, 9, 2046-2056. <doi:10.1111/2041-210X.13059>

Examples

lx <- c(1, 0.8, 0.7, 0.5, 0.3, 0.1)

# convert from lx
px <- lx_to_px(lx)
hx <- lx_to_hx(lx)

# convert from px
lx <- px_to_lx(px)
hx <- px_to_hx(px)

# convert from hx
lx <- hx_to_lx(hx)
px <- hx_to_px(hx)

Rage

Life History Metrics from Matrix Population Models

v1.0.0

GPL-3

Authors

Patrick Barks [aut] (<https://orcid.org/0000-0002-5947-8151>), Danny Buss [ctb], Pol Capdevila [aut] (<https://orcid.org/0000-0002-2842-4302>), Hal Caswell [aut] (<https://orcid.org/0000-0003-4394-6894>), Judy P. Che-Castaldo [aut] (<https://orcid.org/0000-0002-9118-9202>), John Jackson [aut] (<https://orcid.org/0000-0002-4563-2840>), Tamora James [aut] (<https://orcid.org/0000-0003-1363-4742>), Owen Jones [aut, cre] (<https://orcid.org/0000-0001-5720-4686>), Sam Levin [aut] (<https://orcid.org/0000-0002-3289-9925>), William K. Petry [aut] (<https://orcid.org/0000-0002-5230-5987>), Roberto Salguero-Gomez [aut] (<https://orcid.org/0000-0002-6085-4433>), Caroline Schuette [ctb] (<https://orcid.org/0000-0002-2063-8736>), Iain Stott [aut] (<https://orcid.org/0000-0003-2724-7436>), Chelsea C. Thomas [aut] (<https://orcid.org/0000-0002-8155-9353>)

Initial release