I have 2 series of variables, I want to plot the probability density function of these 2 variabels (i.e. two curves in one graph), I just want to compare these two variable distribution. what should I do? can I use ggplot2 package? -- View this message in context: http://r.789695.n4.nabble.com/plot-probability-density-function-pdf-tp3897055p3897055.html Sent from the R help mailing list archive at Nabble.com.
x=rnorm(100,1,0.8) # A series. y=rnorm(100,0,0.5) # Another series with different mean and variance. plot(density(x),ylim=c(0,1)) lines(density(y),col="red") Remember that density() is a nonparametric estimator. You should properly choose the bandwith. -- View this message in context: http://r.789695.n4.nabble.com/plot-probability-density-function-pdf-tp3897055p3897747.html Sent from the R help mailing list archive at Nabble.com.
however, if i have an excel file, but there have 6 variables, a,b,c,d,e,f. how to plot the probability density function of a and d in one graph, b and e in another graph? -- View this message in context: http://r.789695.n4.nabble.com/plot-probability-density-function-pdf-tp3897055p3898183.html Sent from the R help mailing list archive at Nabble.com.
i want to plot probability density function,predictvalue has missing value and observevalue has not missing value, I tried .. attach(test) #test is the name of the data file names(test) plot(density(predictvalue,na.rm=TRUE)) lines(density(observevalue)) is it correct? -- View this message in context: http://r.789695.n4.nabble.com/plot-probability-density-function-pdf-tp3897055p3898605.html Sent from the R help mailing list archive at Nabble.com.
Assuming you mean you want them on the same device: layout(1:2) plot(density(a)) lines(density(d),col=2) plot(density(b)) lines(density(e),col=2) Getting your data into R is more of a challenge, but if you want my unsolicited advice, you can do far worse than saving as CSV and using read.csv() Michael On Wed, Oct 12, 2011 at 10:31 AM, pigpigmeow <glorykwok at hotmail.com> wrote:> however, if i have an excel file, but there have 6 variables, a,b,c,d,e,f. > > > how to plot the probability density function of a and d in one graph, b and > e in another graph? > > > -- > View this message in context: http://r.789695.n4.nabble.com/plot-probability-density-function-pdf-tp3897055p3898183.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. >