row names are not the same as line numbers or indices. you've likely done some row-based selection on an original matrix or data frame. observe from the example below. (and in the future please don't expect people to sort through your 500+ line matrices by hand to find your problems.)
> x <- matrix(1:12, byrow = TRUE, ncol = 3) > rownames(x) <- 1:4 > x [,1] [,2] [,3] 1 1 2 3 2 4 5 6 3 7 8 9 4 10 11 12 > y <- x[x[,2] != 5,] > y [,1] [,2] [,3] 1 1 2 3 3 7 8 9 4 10 11 12 > dim(x) [1] 4 3 > dim(y) [1] 3 3 -murat On Jun 2, 5:47 pm, Changbin Du <changb...@gmail.com> wrote: > > dim(tmp) > [1] 576 12 > > tmp > > 1 10 11 12 13 2 3 4 5 6 7 9 > 1 0 0 0 0 0 0 0 12 0 0 0 0 > 2 0 0 0 0 0 0 0 15 0 0 0 0 > 3 0 0 0 0 0 0 0 11 0 0 0 0 > 4 0 0 0 0 0 0 0 11 0 0 0 0 > 5 0 0 0 0 0 0 0 12 0 0 0 0 > 6 0 0 0 0 0 0 0 6 0 0 0 0 > 7 0 0 0 0 0 0 0 5 0 0 0 0 > 8 0 0 0 0 0 0 0 11 0 0 0 0 > 9 0 0 0 0 0 0 0 11 0 0 0 0 > 10 0 0 0 0 0 0 0 5 0 0 0 0 > 11 0 0 0 0 0 0 0 8 0 0 0 0 > 12 0 0 0 0 0 0 0 12 0 0 0 0 > 13 0 0 0 0 0 0 0 6 0 0 0 0 > 14 0 0 0 0 0 0 0 5 0 0 0 0 > 15 0 0 0 0 0 0 0 5 0 0 0 0 > 16 0 0 0 0 0 0 0 6 0 0 0 0 > 17 0 0 0 0 0 0 0 0 0 0 9 0 > 18 0 0 0 0 0 0 0 13 0 0 0 0 > 19 0 0 0 0 0 0 0 7 0 0 0 0 > 20 0 0 0 0 0 0 0 10 0 0 0 0 > 21 0 0 0 0 0 0 0 13 0 0 0 0 > 22 0 0 0 0 0 0 0 17 0 0 0 0 > 23 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579 0 0 0 0 0 0 0 0 9 0 0 0 > 580 0 0 0 0 0 0 0 0 7 0 0 0 > 581 0 0 0 0 0 0 0 0 21 0 0 0 > 582 0 0 0 0 0 0 0 0 24 0 0 0 > 583 0 0 0 0 0 0 0 0 6 0 0 0 > 584 0 0 0 0 0 0 0 0 9 0 0 0 > 585 0 0 0 0 0 0 0 0 9 0 0 0 > 586 0 0 0 0 0 0 0 0 13 0 0 0 > 587 0 0 0 0 0 0 0 0 6 0 0 0 > 588 0 0 0 0 0 0 0 0 18 0 0 0 > 589 0 0 0 0 0 0 0 0 9 0 0 0 > 590 0 0 0 0 0 0 0 0 12 0 0 0 > 591 0 0 0 0 0 0 0 0 11 0 0 0 > 592 0 0 0 0 0 0 0 0 5 0 0 0 > 593 0 0 0 0 0 0 0 0 12 0 0 0 > 594 0 0 0 0 0 0 0 0 10 0 0 0 > 595 0 0 0 0 0 0 0 0 12 0 0 0 > 596 0 0 0 0 0 0 0 0 18 0 0 0 > 597 0 0 0 0 0 0 0 0 0 0 0 14 > 598 0 0 0 0 0 0 0 0 6 0 0 0 > 599 0 0 0 0 0 0 0 0 0 0 0 6 > 600 0 0 0 0 0 0 0 0 6 0 0 0> dim(tmp) > > [1] 576 12 > > Why the dim(tmp) gave me different results? THe line numbers are not right? > > Thanks! > > -- > Sincerely, > Changbin > -- > > [[alternative HTML version deleted]] > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.