[R] about plotting a special case

[lily li]

Thanks, Jim. The code works, but I don't understand why you use q1090 <-
quantile(DF1$B, probs=c()), rather than DF1$A? Also, how to add a legend
for both points DF1 and DF2?

On Wed, Jul 12, 2017 at 8:25 PM, Jim Lemon <drjimlemon at gmail.com> wrote:

> Hi lily,
> Here is the first plot:
>
> plot(DF1$A,DF1$B,pch=19,col="red")
> meanA<-mean(DF1$A)
> meanB<-mean(DF1$B)
> points(meanA,meanB,pch=18,col="red")
> q1090<-quantile(DF1$B,probs=c(0.1,0.9))
> library(plotrix)
> dispersion(meanA,meanB,q1090[2],q1090[1],
>  intervals=FALSE,col="red")
>
> The same code will work for a second data frame, except that you would
> use "points" instead of "plot" and change the color. You may also have
> to specify xlim and ylim in the first call to "plot" so that all
> values are on the plot.
>
> Jim
>
>
>
> On Thu, Jul 13, 2017 at 11:46 AM, lily li <chocold12 at gmail.com> wrote:
> > Hi R users,
> >
> > I have a question about plotting. There is the dataframe below, while
> each
> > row represents a record. If I want to plot on a A-B plot, i.e., x-axis
> > represents A, while y-axis represents B values. However, I want to plot
> the
> > mean value from records 1-10 as one point, while the 10th and 90th
> > percentiles represent the error bars, such as one point in the attached
> > example. I don't know how to do this, and then add a legend.
> > After the above step, if I have a dataframe DF2 with the same structure
> but
> > different values than DF1, how to show the point on the same figure, but
> > use different colors or symbols? Thanks for any advices.
> >
> > DF1
> >
> >         A  B  C
> > 1     65 21 54
> > 2     66 23 55
> > 3     54 24 56
> > 4     44 23 53
> > 5     67 22 52
> > 6     66 21 50
> > 7     45 20 51
> > 8     56 19 57
> > 9     40 25 58
> > 10   39 24 53
> >
> > ______________________________________________
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>

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