Hello all!

I have a problem to draw a polygon with R. My data is like this>
   Year Nb.series Perc.pos Perc.neg Nature RGV_mean RGV_sd neg poz
1 1901 1 0.00 0.00 0 4.29 NA 0.00 0.00
2 1902 1 100.00 0.00 1 16.47 NA 0.00 100.00
3 1903 1 100.00 0.00 1 31.31 NA 0.00 100.00
4 1904 1 0.00 0.00 0 -9.62 NA 0.00 0.00
5 1905 1 0.00 100.00 -1 -22.55 NA -100.00 0.00
6 1906 1 0.00 100.00 -1 -12.09 NA -100.00 0.00
7 1907 2 50.00 50.00 0 5.40 50.95 -50.00 50.00
8 1908 3 33.33 66.67 -1 -6.46 19.38 -66.67 33.33
9 1909 3 33.33 0.00 0 9.70 12.82 0.00 33.33
10 1910 3 33.33 66.67 -1 -6.91 26.42 -66.67 33.33
11 1911 3 0.00 66.67 -1 -11.63 13.86 -66.67 0.00
12 1912 3 33.33 0.00 0 16.26 29.25 0.00 33.33
-- 

I try this code:
plot(seriep$Year,seriep$poz, type="l",ylim=c(-100,100))
lines(seriep$Year,seriep$neg, type="l",col="red")

polygon(c(seriep$Year,rev(seriep$Year)),c(seriep$neg,rev(seriep$poz),col="grey93",border=NA))
and this is the error>Error in xy.coords(x, y) : 'x' and 'y' lengths differ.

Please help me to solve this problem.

Thank you!

Best regards,
---
Catalin-Constantin ROIBU
Lecturer PhD, Forestry engineer
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone     +4 0230 52 29 78, ext. 531
mobile phone   +4 0745 53 18 01
                       +4 0766 71 76 58
FAX:                +4 0230 52 16 64
silvic.usv.ro

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