Hi,
I am trying to plot my dataset, consisting of one column with numeric values
and one column with group IDs.
The set is similar to the following df.
df <- NULL
for ( i in 1:20)
{
tmp1 <- runif(1000,0,5)
tmp2 <- cbind(tmp1,i)
df <- rbind(df,tmp2)
}
Now I would like to plot the numeric column, stratified by the group IDs, in a
single figure.
First, I partitioned the frame into a 1x20 array. Then I plot the numeric
values of each group in a sub-plot.
Note that only should the left most y-axis be shown, and the x-axis is only the
group numbers.
Also the margin between two sub-frame should be fairly small so it looks like
only one figure, rather than 20 figures.
The following codes were used to achieve my goal, but I got an error saying
figure margins too large.
cols <- sample(rainbow(20))
par(mfrow=c(1,20))
for ( i in 1:20)
{
tmp <- subset(df, df[,2]==i)
if(i!=1)
{
plot(df[,1],axes=F,col=cols[i],frame.plot=F,xlab=NA,pch=19,ylim=c(0,5))
mtext(i, line=1,side=1)
}
else{
plot(df[,1],axes=F,col=cols[i],frame.plot=F,xlab=NA,pch=19,ylim=c(0,5))
axis(2,at=0:5)
mtext(i, line=1,side=1)
}
}
I also tried to set the margins by modifying the _par_ command:
par(mfrow=c(1,20),mar=(4,2,4,0.05))
Still, received the same error.
The other experiment:
While I was using the following codes, it almost showed what I would like, but
the figure ended with only the last sub-plot. The only difference between the
two is I was attempting to add a main-label in the figure.
cols <- sample(rainbow(20))
par(mfrow=c(1,20),mar=c(4,0.05,3,0.05))
plot.new()
mtext("Multiple figures in a plot",line=1,at=13)
for ( i in 1:20)
{
tmp <- subset(df, df[,2]==i)
if(i!=1)
{
plot(df[,1],axes=F,col=cols[i],frame.plot=F,xlab=NA,pch=19,ylim=c(0,5))
mtext(i, line=1,side=1)
}
else{
plot(df[,1],axes=F,col=cols[i],frame.plot=F,xlab=NA,pch=19,mar=c(4,4,3,0.05),ylim=c(0,5))
axis(2,at=0:5)
mtext(i, line=1,side=1)
}
}
Any suggestions and advices are welcome.
Thanks,
Mike
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