Hi everyone,
Is there any command for updating table withing a loop? For instance, at i, I
have a table as ZZ = table(data.raw[1:ind[i]]) where "ind" = c(10, 20,
30, ...). Then , ZZ will be as follow
"A" "B" "C"
3 10 2
At (i + 1), ZZ = table(data.raw[(ind[i]+1):ind[i+1]])
"A" "B" "D"
4 7 8
Is there any command that can update the table ZZ for each time so that in the
above example, ZZ will be
"A" "B" "C" "D"
7 17 2 8
Thanks.
liu
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If I am not wrong, it seems that you want to get factor counts in the whole scale of data.raw. Maybe you can do that just like this: table(data.raw) On Sat, Jul 24, 2010 at 1:44 AM, Marcus Liu <marcusliu667 at yahoo.com> wrote:> Hi everyone, > > Is there any command for updating table withing a loop?? For instance, at i, I have a table as ZZ = table(data.raw[1:ind[i]]) where "ind" = c(10, 20, 30, ...).? Then , ZZ will be as follow > > "A" "B" "C" > ?3??? 10?? 2 > > At (i + 1), ZZ = table(data.raw[(ind[i]+1):ind[i+1]]) > > "A" "B" "D" > ?4 ?? 7??? 8 > > Is there any command that can update the table ZZ for each time so that in the above example, ZZ will be > > "A" "B" "C" "D" > ?7??? 17?? 2??? 8 > > Thanks. > > liu > > > > > ? ? ? ?[[alternative HTML version deleted]] > > > ______________________________________________ > R-help at 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. > >
On Fri, 23 Jul 2010, Marcus Liu wrote:> Hi everyone, > > Is there any command for updating table withing a loop??"Loops? We don't need no stinking loops!" (From 'The Good, the Bad, and the Rgly') tab <- table(data.raw, findInterval(seq(along=data.raw), ind+1 ) ) tab %*% upper.tri(tab,diag=T) or tab2 <- tapply( factor(data.raw), findInterval(seq(along=data.raw), ind+1 ), table) Reduce( "+", tab2, accum=TRUE ) HTH, Chuck p.s. See the posting guide re including a reproducible example with requests like yours.> For instance, at i, I have a table as ZZ = table(data.raw[1:ind[i]]) > where "ind" = c(10, 20, 30, ...).?Then , ZZ will be as follow > > "A" "B" "C" > ?3??? 10?? 2 > > At (i + 1), ZZ = table(data.raw[(ind[i]+1):ind[i+1]]) > > "A" "B" "D" > ?4 ?? 7??? 8 > > Is there any command that can update the table ZZ for each time so that in the above example, ZZ will be > > "A" "B" "C" "D" > ?7??? 17?? 2??? 8 > > Thanks. > > liu > > > > > [[alternative HTML version deleted]] > >Charles C. Berry (858) 534-2098 Dept of Family/Preventive Medicine E mailto:cberry at tajo.ucsd.edu UC San Diego http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901