<font face="trebuchet ms,sans-serif">Gilson seu código é não reproduzível. Os dados existem na sua sessão R e não na minha. Veja as mensagens de erro. Crie dados artificiais com expand.grid+rnorm, sempre faço assim na lista. Ou use textconnection(), ou coloque no corpo da mensagem (se for menor que 20 linhas) que uso read.table("clipboard", ...)<br>
<br><span style="font-family: courier new,monospace;">> barplot(dados$chla, density=c(20), col="black", angle=c(45),</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">+ xlab="Espécies", font.lab=2, axes=TRUE,</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">+ ylab=expression(bold(Concentração~de~pigmentos~cloroplastídicos~(mu~mol~.~g^{-1}))),</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">+ ylim=c(0,0.5))</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">Erro em barplot(dados$chla, density = c(20), col = "black", angle = c(45), : </span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> objeto 'dados' não encontrado</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">> axis(1, at=1:3, labels=dados$esp)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">Erro em as.graphicsAnnot(labels) : objeto 'dados' não encontrado</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">> par(new=TRUE)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">Warning message:</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">In par(new = TRUE) : calling par(new=TRUE) with no plot</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">> barplot(dados$chlb, density=c(21), col="black", angle=c(100))</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">Erro em barplot(dados$chlb, density = c(21), col = "black", angle = c(100)) : </span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> objeto 'dados' não encontrado</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">> axes=TRUE, frame=T, ann=F)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">Erro: unexpected ',' in " axes=TRUE,"</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">> par(new=TRUE)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">Warning message:</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">In par(new = TRUE) : calling par(new=TRUE) with no plot</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">> barplot(dados$caro, density=c(22), col="black", angle=c(200))</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">Erro em barplot(dados$caro, density = c(22), col = "black", angle = c(200)) : </span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> objeto 'dados' não encontrado</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">> </span><br style="font-family: courier new,monospace;"><br>À disposição.<br>Walmes.<br><br clear="all"></font><span style="font-family: trebuchet ms,sans-serif;">==========================================================================</span><br style="font-family: trebuchet ms,sans-serif;">
<span style="font-family: trebuchet ms,sans-serif;">Walmes Marques Zeviani</span><br style="font-family: trebuchet ms,sans-serif;"><span style="font-family: trebuchet ms,sans-serif;">LEG (Laboratório de Estatística e Geoinformação, 25.450418 S, 49.231759 W)</span><br style="font-family: trebuchet ms,sans-serif;">
<span style="font-family: trebuchet ms,sans-serif;">Departamento de Estatística - Universidade Federal do Paraná</span><br style="font-family: trebuchet ms,sans-serif;"><span style="font-family: trebuchet ms,sans-serif;">fone: (+55) 41 3361 3573</span><br style="font-family: trebuchet ms,sans-serif;">
<span style="font-family: trebuchet ms,sans-serif;">VoIP: (3361 3600) 1053 1173</span><br style="font-family: trebuchet ms,sans-serif;"><span style="font-family: trebuchet ms,sans-serif;">e-mail: <a href="mailto:walmes@ufpr.br" target="_blank">walmes@ufpr.br</a></span><br style="font-family: trebuchet ms,sans-serif;">
<span style="font-family: trebuchet ms,sans-serif;">twitter: @walmeszeviani</span><br style="font-family: trebuchet ms,sans-serif;"><span style="font-family: trebuchet ms,sans-serif;">homepage: <a href="http://www.leg.ufpr.br/%7Ewalmes" target="_blank">http://www.leg.ufpr.br/~walmes</a></span><br style="font-family: trebuchet ms,sans-serif;">
<span style="font-family: trebuchet ms,sans-serif;">linux user number: 531218</span><br style="font-family: trebuchet ms,sans-serif;"><span style="font-family: trebuchet ms,sans-serif;">==========================================================================</span><br>