[R] how to show percentage of individuals for two groups on histogram?

[Ana Marija]

the result would basically look something like this on in attach or
the overlay of those two plots


On Thu, May 21, 2020 at 5:23 PM Ana Marija <sokovic.anamarija using gmail.com> wrote:
>
> Hello,
>
> I have a data frame like this:
> > head(a)
>          FID   IID FLASER PLASER DIABDUR HBA1C ESRD   pheno
> 1 fam1000-03 G1000      1      1      38  10.2    1 control
> 2 fam1001-03 G1001      1      1      15   7.3    1 control
> 3 fam1003-03 G1003      1      2      17   7.0    1    case
> 4 fam1005-03 G1005      1      1      36   7.7    1 control
> 5 fam1009-03 G1009      1      1      23   7.6    1 control
> 6 fam1052-03 G1052      1      1      32   7.3    1 control
>
> > dim(a)
> [1] 1698    8
>
> I am doing histogram plot via:
> ggplot(a, aes(x=HBA1C, fill=pheno)) + geom_histogram(binwidth=.5,
> position="dodge")
>
> there is 848 who have "case" in pheno column and 892 who have
> "control" in pheno column.
>
> I would like to have on y-axis shown percentage of individuals which
> have either "case" or "control" in pheno instead of count.
>
> Please advise,
> Ana

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