如何删除分析好的seurat对象的列
..@ meta.data :'data.frame': 9167 obs. of 5 variables:
.. ..$ orig.ident : Factor w/ 1 level "HCC04T": 1 1 1 1 1 1 1 1 1 1 ...
.. ..$ nCount_RNA : num [1:9167] 1942 2090 862 1588 22003 ...
.. ..$ nFeature_RNA : int [1:9167] 951 832 476 754 3429 400 1278 2283 4191 1052 ...
.. ..$ pANN_0.25_0.001_754: num [1:9167] 0.0769 0 0 0.0769 0.3846 ...
.. ..$ doublet_info : chr [1:9167] "Singlet" "Singlet" "Singlet" "Singlet" ...