还是不太明白 附件是实际数据

完美解决问题
rbind.fill()函数帮我解决
rbind.fill {plyr}        R Documentation
Combine data.frames by row, filling in missing columns.

Description

rbinds a list of data frames filling missing columns with NA.

Usage

rbind.fill(...)
Arguments

...       
input data frames to row bind together. The first argument can be a list of data frames, in which case all other arguments are ignored. Any NULL inputs are silently dropped. If all inputs are NULL, the output is NULL.