Copynumber data distributions are generally multi-modal. It is often assumed that the tallest peak represents "normal" and should therefore be centered on a log2ratio of zero. This function uses the density function to find the mode of
copynumber数据分布一般多模态。它经常被认为最高峰代表“正常”,因此,应在零log2ratio中心。此功能使用密度函数模式