If you only want to count cells that are exactly 0.0 (not slightly different due to rounding errors) then try:
> sum( x==0 ) If you want a little wiggle room for rounding error, then you can try something like: > sum( -0.0000001 < x & x < 0.0000001 ) Adjusting the number of 0's as you see fit. Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of maiya > Sent: Thursday, December 03, 2009 9:29 AM > To: r-help@r-project.org > Subject: [R] count number of empty cells in a table/matrix/data.frame > > > Hi everyone! > > This is a ridiculously simple problem, I just can't seem to find the > solution! > > All I need is something equivalent to > > sum(is.na(x)) > > but instead of counting missing values, to count empty cells (with a > value > of 0). > > A naive attempt with is.empty didn't work :) > > Thanks! > > Maja > > Oh, and if the proposed solution would be to make all the empty cells > into > missing cells, that is not an option! There are over 20,000,000 cells > in my > table, and I don't think my computer is in the mood to store two such > objects! > -- > View this message in context: http://n4.nabble.com/count-number-of- > empty-cells-in-a-table-matrix-data-frame-tp947740p947740.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.
