Error: input= ‘http[s]:// ‘ftp[s]://

Error in if (series_types_datafarme$type[series_types_datafarme$var == : argument is of length zero

在回归分析中，如何修改分类变量的参照/参考/ref因子

环境缺失：Error in library(XXXXX)

Error in readRDS(model URl port) : ‘file’◆◆◆◆◆◆◆

Mimic数据提取：Exception while reading from stream

报错信息：Merge keys are not unique in left dataset, not a one-to-many merge