Supplement 1. R code for a randomization test. AkasakaMunemitsu TakamuraNoriko 2016 <h2>File List</h2><p> <a href="random.area.R">random.area.R</a> (md5: 9dde0280e365e0bb72097358f7c47896) </p><h2>Description</h2><p> random.area.R contains R code for a randomization test that continuously selects sample units randomly until the total area of the selected unit exceeds a given threshold. The code may be called from an R program as an external function, or it may be placed in-line within an R program. </p>