Supplement 1. Data and computer programs for fitting multinomial mixture models used in the main article.

File List frogindex.Rdump Description The file frogindex.Rdump is an <b>R</b> dump file that contains 3 <b>R</b> objects. This file should be loaded into <b>R</b> by issuing the command source("frogindex.Rdump") from an active <b>R</b> session. This will yield 3 objects defined subsequently. The file frogindexmodel.fn is an <b>R</b> script containing the commands for fitting multinomial mixture models. Some familiarity with <b>R</b> or the S language is assumed. As an illustration, the model contained in the first row of Table 2 of Royle and Link is fitted and the resulting output is returned. <br> <br> The remaining two objects are data matrices -- gf.data contains the Greenfrog calling index data. This is a matrix where rows index sample locations and columns index sample occasions. Missing values are indicated by "NA" <br> The file gf.temp contains the temperature covariate data, in the same matrix format [sites × occasions].frogindex.Rdump 文件说明：该文件为R转储文件（R dump file），内含3个R对象。需在激活的R会话中执行命令`source("frogindex.Rdump")`以加载该文件，加载后将生成后续定义的3个对象。 文件frogindexmodel.fn为R脚本，包含拟合多项混合模型的相关命令。使用本数据集需具备R语言或S语言的基础使用经验。 作为示例，本代码可复现Royle与Link所著文献中表2第一行的模型，并返回对应的拟合输出结果。 剩余两个对象为数据矩阵：gf.data包含绿蛙鸣叫指数数据，该矩阵的行代表采样点位，列代表采样时段，缺失值以"NA"标识。 文件gf.temp包含温度协变量数据，矩阵格式与gf.data一致，即[采样点位 × 采样时段]。