Q-Q plot with a different x label

[Claire31srz]

Hi y'all!

I 'm doing a special Q-Q plot and I'm trying to control the xlab, but it doesnt work.
Here is my code
monthly$quantile=exp(-(1-0.808*((monthly$MonthlyMax-82.119)/8.085))^(-1/-0.808))
monthly$returnperiod=1/(1-monthly$quantile)

model=vector("numeric",length(sort(monthly$MonthlyMax)))
for (i in 1:length(model)){
model=qgev(cdf,-0.808,82.119,8.085,lower.tail=TRUE)
}
plot(model~sort(monthly$MonthlyMax),xlab='Return Periods',main='Q-Q plot',xaxt='n')

this is the output and there is not xlab

Do you have any idea why?
MonthlyMax MonthlyMin Date
1: 70.4 55.2 2015-01-01
2: 74.7 56.3 2015-02-01
3: 77.5 61.8 2015-03-01
4: 82.9 63.1 2015-04-01
5: 88.5 77.8 2015-05-01
6: 89.5 83.9 2015-06-01
7: 89.5 81.5 2015-07-01
8: 91.9 81.0 2015-08-01
9: 87.6 79.7 2015-09-01
10: 85.1 69.6 2015-10-01
11: 81.9 64.7 2015-11-01
12: 75.6 -99.0 2015-12-01
13: 72.0 40.2 2016-01-01
14: 75.5 48.9 2016-02-01
15: 76.2 -99.0 2016-03-01
16: 82.9 71.0 2016-04-01
17: 87.8 -99.0 2016-05-01
18: 89.9 80.2 2016-06-01
19: 91.7 83.0 2016-07-01
20: 89.1 80.6 2016-08-01

[AlexisW]

What is qgev(), does it give the same result with your initialized model (all 0)?

How do you plot? Is it in RStudio integrated device? Or in RGUI? If RStudio, what happens if you redimension the plotting window, and is it intentional to have such a narrow window?