[R] How to remove some rows from a data.frame
Henrique Dallazuanna
wwwhsd at gmail.com
Mon Dec 24 17:32:09 CET 2007
My object df is this:
df <- structure(list(BAC = structure(c(13L, 3L, 8L, 14L, 12L, 4L, 2L,
5L, 7L, 9L, 11L, 10L, 6L, 1L), .Label = c("CTD-2003M22", "RP11-155C15",
"RP11-198H14", "RP11-210E16", "RP11-210F8", "RP11-218N6", "RP11-263L17",
"RP11-267M21", "RP11-340F16", "RP11-474G23", "RP11-68A1", "RP11-6B16",
"RP11-80G24", "RP11-89A19"), class = "factor"), chr = c(1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L), pos = c(77465510L,
78696291L, 79681704L, 80950808L, 82255496L, 228801510L, 230957584L,
237932418L, 65724492L, 65879898L, 67718674L, 68318411L, 68454651L,
68567494L), s1 = c(-1L, -1L, -1L, -1L, -1L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L), s2 = c(0L, 0L, 0L, 0L, 0L, -1L, -1L, -1L, 1L,
1L, 0L, 0L, 0L, 0L), Count = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1)), .Names = c("BAC", "chr", "pos", "s1", "s2", "Count"
), row.names = c(NA, -14L), class = "data.frame")
works for me
On 24/12/2007, affy snp <affysnp at gmail.com> wrote:
> Dear Henrique,
>
> Thanks a lot for the help! I got this:
>
> > f <- function(x)
> + {
> + cbind.data.frame(chr=unique(x$chr),
> + Start=min(x$pos),
> + End=max(x$pos),
> + Rows=nrow(x),
> + Pattern=paste("(", x$s1, x$s2, ")")
> + )
> + }
> >
> > do.call("rbind", lapply(lapply(split(df, paste(df$s1, df$s2)), f),
> unique))
> Error in split.default(df, paste(df$s1, df$s2)) :
> first argument must be a vector
>
>
> Any clue?
>
> Best,
> Allen
>
>
> On Dec 24, 2007 11:27 AM, Henrique Dallazuanna < wwwhsd at gmail.com> wrote:
> > Try this:
> >
> > f <- function(x)
> > {
> > cbind.data.frame (chr=unique(x$chr),
> > Start=min(x$pos),
> > End=max(x$pos),
> > Rows=nrow(x),
> > Pattern=paste("(", x$s1, x$s2, ")")
> > )
> > }
> >
> > do.call("rbind", lapply(lapply(split(df, paste(df$s1, df$s2)), f),
> unique))
> >
> >
> >
> >
> >
> > On 24/12/2007, affy snp <affysnp at gmail.com > wrote:
> > > Thanks Moshe! I apologize for not being so clear about the
> > > second part. Again, below is how the data looks like. The
> > > pattern for columns s1 and s2 will be:
> > >
> > > (-1 -1) (-1 0) (-1 1) (0 -1) (0 0) (0 1) (1 -1) (1 0) (1 1)
> > > 104 131 57 631 305 668 33 15 107
> > >
> > > There are 9 patterns, in other words, 9 combinations of -1,1, 0
> > > given in the parenthesis. The occurring numbers are underneath.
> > > What I wish to have is that: scan the data from the begin,
> > > if any consecutive rows are of the same pattern (one of the 9
> > > combinations in the above), we will 'memorize' the following
> information:
> > >
> > > the number in 'chr' column, the number in 'pos' column for the first
> > > row in the consecutive rows, the number in 'pos' column for the
> > > last row in the consecutive rows, how many rows of the consecutive
> > > rows, the corresponding pattern for them.
> > >
> > > I forgot to reinforce one requirement before for definition of
> > > the consecutive rows, which is that they are in the consecutive
> > > orders and are of the same number of 'chr'.
> > >
> > > Just to illustrate this, an example could be that, based on the data:
> > >
> > > BAC chr pos s1 s2
> > > RP11-80G24 1 77465510 0 0
> > > RP11-198H14 1 78696291 -1 0
> > > RP11-267M21 1 79681704 -1 0
> > > RP11-89A19 1 80950808 -1 0
> > > RP11-6B16 1 82255496 -1 0
> > > RP11-210E16 2 228801510 -1 0
> > >
> > > even though row 2---6 are of the same pattern, which is -1 0
> > > and are in the consecutive order, but row 6 is of different number
> > > of 'chr' than other rows. Therefore, we will not count row 6 and
> > > end up with:
> > > chr Start End #of_rows pattern
> > > 1 78696291 82255496 4 (-1 0)
> > >
> > > Hope this is clear. Thank you once again and Merry X'mas!
> > >
> > > Best,
> > > Allen
> > >
> > >
> > >
> > >
> > >
> > > > BAC chr pos s1 s2
> > > > RP11-80G24 1 77465510 -1 0
> > > > RP11-198H14 1 78696291 -1 0
> > > > RP11-267M21 1 79681704 -1 0
> > > > RP11-89A19 1 80950808 -1 0
> > > > RP11-6B16 1 82255496 -1 0
> > > > RP11-210E16 1 228801510 0 -1
> > > > RP11-155C15 1 230957584 0 -1
> > > > RP11-210F8 1 237932418 0 -1
> > > > RP11-263L17 2 65724492 0 1
> > > > RP11-340F16 2 65879898 0 1
> > > > RP11-68A1 2 67718674 0 0
> > > > RP11-474G23 2 68318411 0 0
> > > > RP11-218N6 2 68454651 0 0
> > > > CTD-2003M22 2 68567494 0 0
> > > > .....
> > > >
> > >
> > > On Dec 24, 2007 3:54 AM, Moshe Olshansky <m_olshansky at yahoo.com> wrote:
> > >
> > > > To answer your firs question try
> > > >
> > > > M[-which( M$s1 == 0 & M$s2 == 0),]
> > > >
> > > > For the second question, you must start with the more
> > > > precise definition of the grouping criterion.
> > > >
> > > > --- affy snp <affysnp at gmail.com> wrote:
> > > >
> > > > > Hello list,
> > > > >
> > > > > I have a data frame M like:
> > > > >
> > > > > BAC chr pos s1 s2
> > > > > RP11-80G24 1 77465510 -1 0
> > > > > RP11-198H14 1 78696291 -1 0
> > > > > RP11-267M21 1 79681704 -1 0
> > > > > RP11-89A19 1 80950808 -1 0
> > > > > RP11-6B16 1 82255496 -1 0
> > > > > RP11-210E16 1 228801510 0 -1
> > > > > RP11-155C15 1 230957584 0 -1
> > > > > RP11-210F8 1 237932418 0 -1
> > > > > RP11-263L17 2 65724492 0 1
> > > > > RP11-340F16 2 65879898 0 1
> > > > > RP11-68A1 2 67718674 0 0
> > > > > RP11-474G23 2 68318411 0 0
> > > > > RP11-218N6 2 68454651 0 0
> > > > > CTD-2003M22 2 68567494 0 0
> > > > > .....
> > > > >
> > > > > how to remove those rows which have 0 for both of
> > > > > columns s1,s2?
> > > > > sth like M[!M$21=0&!M$s2=0]?
> > > > >
> > > > > Moreover, I want to get a list which could find a
> > > > > subset of rows which have
> > > > > the same pattern of data. For example, the first 8
> > > > > rows in M can be
> > > > > clustered
> > > > > into 2 groups (represented below in 2 rows) and
> > > > > shown as:
> > > > >
> > > > > chr Start End # of
> > > > > rows Pattern
> > > > > 1 77465510 82255496 5
> > > > > (-1 0)
> > > > > 1 228801510 237932418 3
> > > > > (0 -1)
> > > > >
> > > > > Can anybody help me out of this? Thank you very much
> > > > > and happy holiday!
> > > > >
> > > > > Best,
> > > > > Allen
> > > > >
> > > > > [[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.
> > > > >
> > > >
> > > >
> > >
> > > [[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.
> > >
> >
> >
> > --
> > Henrique Dallazuanna
> > Curitiba-Paraná-Brasil
> > 25° 25' 40" S 49° 16' 22" O
> >
>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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