Description Usage Arguments Details References Examples
Buzzard age is estimated based on a standard growth curve modeled from published data by Bijlsma (Limosa 72, 1999).
1 2 3 4 5 6 7 8 9 |
df |
data frame containing data |
wing |
column name for wing measurements |
sex |
column name giving the sex of individuals or NULL |
unit |
unit of values. By default in mm |
.plot |
logical |
decimals |
decimals |
.show_model |
logical |
Estimations are based on a four degree polynomial fit
Bijlsma, RG 1999: Sex determination of nestling Common Buzzards Buteo buteo. Limosa 72, 1.10
1 2 3 | ## 240 mm wing length
# buteo_age(data.frame(wing = c(240,240), sex = c("male","female")))
# buteo_age(data.frame(wing = c(240,240), sex = c(1,0)))
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