<font face="trebuchet ms,sans-serif">Também dá pra usar a função findInterval(), que suponho que tenha tratamento para ser eficiente para grandes vetores, veja<br><br><span style="font-family: courier new,monospace;">x <- rnorm(1000)</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">intervalo <- c(-1,1)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">indice <- findInterval(x, intervalo)</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">plot(x, col=indice+1)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">abline(h=intervalo)</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;">cut(x, intervalo)</span><br style="font-family: courier new,monospace;"><br>nesse caso, o índice 1 indica que pertence ao intervalo. A cut() é outra opção.<br><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>