更改原matrix文件名为：
matrix.mtx
gz文件，后缀系统省略
方法一：
setwd("D:/GEO数据/NAFLD/GSE169446/DC")
options(scipen = 200)
pbmc.data<-Read10X(data.dir ="D:/GEO数据/NAFLD/GSE169446/DC")
返回：
Error in readMM(file = matrix.loc) : file is not a MatrixMarket file
In addition: Warning message:
In scan(file, nmax = 1, what = what, quiet = TRUE, ...) :
embedded nul(s) found in input
方法二：
matrix_data <- Matrix::readMM("D:/GEO数据/NAFLD/GSE169446/DC/matrix.mtx")
返回：
Error in open.connection(file) : cannot open the connection
In addition: Warning message:
In open.connection(file) :
cannot open file 'D:/GEO数据/NAFLD/GSE169446/matrix.mtx': No such file or directory