Hi,
is there any way to keep a sub matrix dimension?
exemple :
i1<-1; i2<-1
j1<-2; j2<-3;
ret <-matrix(1,4,4)[i1:i2,j1:j2] ;
dim(ret) is NULL because the submatrix single col or single row is coerce to a vector
automaticaly.
How can i bypass this cast : submatrix->vector ???????
Thank you.
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