Sample size

Estimate sample size for stratified random sampling

sample_size(oa_se, w, ua)

Arguments

oa_se

is the standard error of the estimated overall accuracy

w

is a vector the mapped area proportions of all classes

ua

is a vector of User's accuracy of all classes

Value

number of estimated sample size

Details

Estimate sample size for stratified random sampling

References

Olofsson, P., Foody, G.M., Herold, M., Stehman, S.V., Woodcock, C.E., & Wulder, M.A. (2014). Good practices for estimating area and assessing accuracy of land change. Remote Sensing of Environment, 148, 42-57

Author

Dirk Pflugmacher

Examples

w <- c(0.02, 0.015, 0.320, 0.645)
ua <- c(0.7, 0.6, 0.9, 0.95)
sample_size(oa_se=0.01, w=w, ua=ua)
#> [1] 640.5359