cyoubo5 发表于 2014-4-3 12:06 
感谢指导,已经下载rootsolve包并进行调试。但是发现,有个interval参数设置很有技巧啊。这个不是指搜索的 ...
你看一下帮助?uniroot.all
It is not guaranteed that all roots will be recovered. 
This will depend on n, the number of subintervals in which the interval is divided. 
区间长度较大,把参数n设置大一点,默认是100.