Spearman's rank correlation between the number of samples and ranks of genes per method.

For each method, the scores are converted into ranks. Spearman's rank correlation is calculated between each method and the number of samples.

针对每种方法，先将其得分转换为秩次；随后计算该方法的秩次得分与样本量之间的斯皮尔曼秩相关系数（Spearman's rank correlation）。