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problem with legend Renyi diversity profile

Kátia Emidio 
Dear all,
I am new at Calculating Renyi diversity and I'm having  a problem with
plotting the results.
My data.frame results is:


 Renyi.viz <- renyiresult(sp, method="s")
0  0.25   0.5     1     2     4     8   Inf
1  3.219 3.189 3.155 3.080 2.906 2.611 2.379 2.169
2  3.091 3.050 3.006 2.912 2.711 2.384 2.108 1.846
3  3.296 3.257 3.213 3.109 2.861 2.486 2.248 2.054
4  2.773 2.739 2.705 2.636 2.498 2.271 2.042 1.792
5  3.091 3.051 3.004 2.887 2.583 2.117 1.839 1.609
6  3.178 3.147 3.113 3.037 2.863 2.542 2.253 1.974
7  3.045 3.006 2.965 2.877 2.703 2.468 2.298 2.110
8  3.135 3.082 3.019 2.866 2.509 2.061 1.804 1.580
9  2.890 2.867 2.842 2.791 2.688 2.520 2.358 2.159
10 3.258 3.230 3.199 3.131 2.977 2.716 2.484 2.197
11 2.944 2.923 2.899 2.846 2.719 2.481 2.275 2.079
12 3.135 3.118 3.100 3.060 2.974 2.808 2.606 2.303
13 2.890 2.873 2.853 2.811 2.716 2.526 2.312 2.037
14 3.178 3.138 3.093 2.989 2.749 2.400 2.166 1.917
15 3.045 2.992 2.934 2.802 2.531 2.193 1.972 1.735

When plotting it I'm getting the answer :

renyiplot(Renyi.viz, evenness = F, addit=F, pch=1, col="3", cex=1)

*Error in legend(graphics::locator(1), legend = rownames(x), pch = c(1:n),
 : *
*  'legend' is of length 0*

Any clue?? Where is the mistake...What should I do?

Thanks