[R] subset by multiple letters condition

[Adams, Jean]

This is quite a different question.  I suggest you start a new post with a
new subject line for this.  And I suggest you include code for an example
plot that you want to use.

Otherwise, you might look here for some ideas on how to control colors in a
scatter plot using base r, http://stackoverflow.com/a/8475315

Jean

On Sat, Apr 23, 2016 at 11:09 AM, <chalabi.elahe at yahoo.de> wrote:

> Thanks Jean, Does anyone know how to set these [hast1] and [hast2] as the
> colors of a plot?
>
>
> On Friday, April 22, 2016 7:39 AM, "Adams, Jean" <jvadams at usgs.gov> wrote:
>
>
>
> You can use the grepl() function to give you logicals for each criterion,
> then combine them as needed.  For example:
>
> # example version of Command
> Command <- paste0("_localize_", c("PD","t2","t1_seq", "abc", "xyz",
> "PD_t1"))
>
> hasPD <- grepl("PD", Command, fixed=TRUE)
> hast1 <- grepl("t1", Command, fixed=TRUE)
> hast2 <- grepl("t2", Command, fixed=TRUE)
>
> > Command[hast1]
> [1] "_localize_t1_seq" "_localize_PD_t1"
>
> > Command[hasPD]
> [1] "_localize_PD"    "_localize_PD_t1"
>
> > Command[hast1 & hasPD]
> [1] "_localize_PD_t1"
>
> Jean
>
>
> On Fri, Apr 22, 2016 at 8:42 AM, ch.elahe via R-help <r-help at r-project.org>
> wrote:
>
>
> >Hi all,
> >
> >I have a data frame df and I want to do subset based on several
> conditions of letters of the names in Command.1)if the names contain PD
> 2)if the names contain t1 3)if the names contain t2 4)if the names contain
> t1 and PD 5)if the names contain t2 and PD 6)otherwise the names would be
> unknown. I don't know how to use grep for all these conditions.
> >
> >   'data.frame': 36919 obs. of 162 variables
> >   $TE                :int 38,41,11,52,48,75,.....
> >   $Command           :factor W/2229 levels
> "_localize_PD","_localize_tre_t2","_localize_t1_seq",...
> >
> >
> >Thanks for any help
> >
> >______________________________________________
> >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> >
>

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