On 18.11.2011 23:48, avinash barnwal wrote:
Hi,
I am looking forward to fill the plot using conditions on variables a2 and
a3. Whenever variable(a2) goes above variable(a3) i fill it with some color
.
I am storing the coordinates of a2 and a3 in x and y as well as time where
it is occurring . But it is not producing properly. I must be wrong
in assigning coordinates.
What should be the correct way to produce the desired plot?
Thanks in advance
######################################################################################################
x<-vector()
y<-vector()
temp_time<-vector()
Defining *empty* vectors is almost never what you really want to do.
for(i in 1:length)
Running a loop 1:length is dangerous if a length is < 1, run it
seq_along(.).
{
if(a2[i]>a3[i])
{
j<-j+1
x[j]<-a2[i]
y[j]<-a3[j]
You meant a3[i], I guess.
temp_time<-time[i]
}
}
At the end of this loop, this obviously simplifies to:
l <- a2 > a3
x <- a2[l]
y <- a3[l]
temp_time <- time[length]
time<-q[,1]
a2<-q[,3]
a3<-q[,4]
plot(time,a2type='l',col='red',ylab='',xlab=" ",axes=FALSE)
lines(time,a3,col='blue',ylab='',xlab=" ")
polygon(c(time[1:j],time[1:j]),c(x,y),col="grey")
Since you don't use anything from inside your loop here, why do you run
that at all? Is this homework?
Uwe Ligges
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