<div dir="ltr">A solução é simples, basta ver o formato das datas.<div><br></div><div style>A modificação abaixo deve ser suficiente se o resta dos seus dados seguirem o mesmo padrão.</div><div style><br></div><div style><br>
</div><div style>z <- read.zoo("dados.csv", header = TRUE, sep = ",", format = "%m/%d/%y")<br></div><div style><br></div><div style><div>> z</div><div> CDI Ibovespa ALFA.DINAMICO.FIA ALFA.FIA</div>
<div>1997-01-02 100.2442 6956 77.56310 0.33373</div><div>1997-01-03 100.3214 6998 78.05032 0.34725</div><div>1997-01-06 100.3986 7160 79.31970 0.34982</div><div>1997-01-07 100.4759 7297 82.01036 0.34084</div>
<div>1997-01-08 100.5533 7427 82.28164 0.34426</div><div>1997-01-09 100.6307 7454 82.79493 0.34285</div><div>1997-01-10 100.7089 7478 82.04698 0.34263</div><div>1997-01-13 100.7871 7412 82.32868 0.34275</div>
<div>1997-01-14 100.8654 7621 84.52306 0.34776</div><div>1997-01-15 100.9437 7668 86.36466 0.34922</div><div>1997-01-16 101.0221 7656 86.74005 0.35130</div><div>1997-01-17 101.1009 7816 86.74305 0.35152</div>
<div>1997-01-20 101.1798 7835 86.84854 0.35297</div><div>1997-01-21 101.2584 7905 87.77227 0.35453</div><div>1997-01-22 101.3370 7818 87.63108 0.35711</div><div>1997-01-23 101.4161 7891 87.96762 0.35650</div>
<div>1997-01-24 101.4955 7760 87.75150 0.35470</div><div>1997-01-27 101.5747 7759 87.71396 0.35453</div><div>1997-01-28 101.6552 7850 87.64120 0.35487</div><div>1997-01-29 101.7345 7737 86.20481 0.35258</div>
<div>1997-01-30 101.8169 7789 86.37315 0.35225</div><div>1997-01-31 101.9103 7965 88.24893 0.35641</div><div>1997-02-03 102.0037 8096 89.45418 0.35969</div><div>1997-02-04 102.0979 8102 89.39141 0.35950</div>
<div>1997-02-05 102.1918 8171 90.26877 0.36263</div><div>1997-02-06 102.2862 8148 90.26682 0.36110</div><div>1997-02-07 102.3806 8317 92.41892 0.36529</div><div>1997-02-12 102.4751 8671 96.43418 0.37360</div>
</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/4/29 Marcos Vagner Macedo <span dir="ltr"><<a href="mailto:marcosvmacedo@gmail.com" target="_blank">marcosvmacedo@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Daniel,<div><br></div><div>Segue um exemplo dos dados para tornar o problema reproduzível.</div><div><br></div><div><table border="0" cellpadding="0" cellspacing="0" width="353" style="border-collapse:collapse;width:264pt">
<colgroup><col width="75" span="3" style="width:56pt">
<col width="64" span="2" style="width:48pt">
</colgroup><tbody><tr height="20" style="min-height:15pt">
<td height="20" width="75" style="min-height:15pt;width:56pt">Data</td>
<td width="75" style="width:56pt">CDI</td>
<td width="75" style="width:56pt">Ibovespa</td>
<td width="64" style="width:48pt">ALFA DINAMICO FIA</td>
<td width="64" style="width:48pt">ALFA FIA</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/02/97</td>
<td align="right">100.244198</td>
<td align="right">6956</td>
<td align="right">77.5631</td>
<td align="right">0.33373</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/03/97</td>
<td align="right">100.32139</td>
<td align="right">6998</td>
<td align="right">78.05032</td>
<td align="right">0.34725</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/06/97</td>
<td align="right">100.398636</td>
<td align="right">7160</td>
<td align="right">79.3197</td>
<td align="right">0.34982</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/07/97</td>
<td align="right">100.475946</td>
<td align="right">7297</td>
<td align="right">82.01036</td>
<td align="right">0.34084</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/08/97</td>
<td align="right">100.553312</td>
<td align="right">7427</td>
<td align="right">82.28164</td>
<td align="right">0.34426</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/09/97</td>
<td align="right">100.630733</td>
<td align="right">7454</td>
<td align="right">82.79493</td>
<td align="right">0.34285</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/10/97</td>
<td align="right">100.70889</td>
<td align="right">7478</td>
<td align="right">82.04698</td>
<td align="right">0.34263</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/13/97</td>
<td align="right">100.78711</td>
<td align="right">7412</td>
<td align="right">82.32868</td>
<td align="right">0.34275</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/14/97</td>
<td align="right">100.865386</td>
<td align="right">7621</td>
<td align="right">84.52306</td>
<td align="right">0.34776</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/15/97</td>
<td align="right">100.943725</td>
<td align="right">7668</td>
<td align="right">86.36466</td>
<td align="right">0.34922</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/16/97</td>
<td align="right">101.022127</td>
<td align="right">7656</td>
<td align="right">86.74005</td>
<td align="right">0.3513</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/17/97</td>
<td align="right">101.100925</td>
<td align="right">7816</td>
<td align="right">86.74305</td>
<td align="right">0.35152</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/20/97</td>
<td align="right">101.179779</td>
<td align="right">7835</td>
<td align="right">86.84854</td>
<td align="right">0.35297</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/21/97</td>
<td align="right">101.258363</td>
<td align="right">7905</td>
<td align="right">87.77227</td>
<td align="right">0.35453</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/22/97</td>
<td align="right">101.337011</td>
<td align="right">7818</td>
<td align="right">87.63108</td>
<td align="right">0.35711</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/23/97</td>
<td align="right">101.416054</td>
<td align="right">7891</td>
<td align="right">87.96762</td>
<td align="right">0.3565</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/24/97</td>
<td align="right">101.495494</td>
<td align="right">7760</td>
<td align="right">87.7515</td>
<td align="right">0.3547</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/27/97</td>
<td align="right">101.574664</td>
<td align="right">7759</td>
<td align="right">87.71396</td>
<td align="right">0.35453</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/28/97</td>
<td align="right">101.655242</td>
<td align="right">7850</td>
<td align="right">87.6412</td>
<td align="right">0.35487</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/29/97</td>
<td align="right">101.734531</td>
<td align="right">7737</td>
<td align="right">86.20481</td>
<td align="right">0.35258</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/30/97</td>
<td align="right">101.816938</td>
<td align="right">7789</td>
<td align="right">86.37315</td>
<td align="right">0.35225</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">01/31/97</td>
<td align="right">101.910268</td>
<td align="right">7965</td>
<td align="right">88.24893</td>
<td align="right">0.35641</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/03/97</td>
<td align="right">102.003692</td>
<td align="right">8096</td>
<td align="right">89.45418</td>
<td align="right">0.35969</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/04/97</td>
<td align="right">102.097876</td>
<td align="right">8102</td>
<td align="right">89.39141</td>
<td align="right">0.3595</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/05/97</td>
<td align="right">102.191799</td>
<td align="right">8171</td>
<td align="right">90.26877</td>
<td align="right">0.36263</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/06/97</td>
<td align="right">102.286157</td>
<td align="right">8148</td>
<td align="right">90.26682</td>
<td align="right">0.3611</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/07/97</td>
<td align="right">102.380603</td>
<td align="right">8317</td>
<td align="right">92.41892</td>
<td align="right">0.36529</td>
</tr>
<tr height="20" style="min-height:15pt">
<td height="20" align="right" style="min-height:15pt">02/12/97</td>
<td align="right">102.475135</td>
<td align="right">8671</td>
<td align="right">96.43418</td>
<td align="right">0.3736</td>
</tr></tbody></table></div></div>
<br>_______________________________________________<br>
R-br mailing list<br>
<a href="mailto:R-br@listas.c3sl.ufpr.br">R-br@listas.c3sl.ufpr.br</a><br>
<a href="https://listas.inf.ufpr.br/cgi-bin/mailman/listinfo/r-br" target="_blank">https://listas.inf.ufpr.br/cgi-bin/mailman/listinfo/r-br</a><br>
Leia o guia de postagem (<a href="http://www.leg.ufpr.br/r-br-guia" target="_blank">http://www.leg.ufpr.br/r-br-guia</a>) e forneça código mínimo reproduzível.<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>
<div style="font-family:Calibri,sans-serif;font-size:16px"><font face="Verdana"><span style="font-family:arial;font-size:10pt">\begin{signature}</span><br style="font-family:arial;font-size:small"><span style="font-family:arial;font-size:10pt">Daniel Marcelino</span><br style="font-family:arial;font-size:small">
<span style="font-family:arial;font-size:10pt">☁ </span><a href="mailto:dm.silva@umontreal.ca" style="font-family:arial;font-size:small" target="_blank">dm.silva@umontreal.ca</a><span style="font-family:arial;font-size:10pt"> </span><br style="font-family:arial;font-size:small">
<span style="font-family:arial;font-size:10pt">☎ (514) 343 6111 #3799</span></font></div><div style="font-family:Calibri,sans-serif;font-size:16px"><font face="Verdana"><span style="font-family:arial;font-size:13px">Skype: d.marcelino </span></font></div>
<div style="font-family:Calibri,sans-serif;font-size:16px"><font face="Verdana"><span style="font-family:arial;font-size:10pt">✎ 3200 Jean Brillant, Office C5071</span><br style="font-family:arial;font-size:small"><span style="font-family:arial;font-size:10pt">Montreal, QC; H3T 1N8</span><br style="font-family:arial;font-size:small">
<span style="font-family:arial;font-size:10pt">Canada</span><br style="font-family:arial;font-size:small"><span style="font-family:arial;font-size:10pt">\end{signature}</span></font></div><div style="font-family:Calibri,sans-serif;font-size:16px">
<font face="Verdana"><span style="font-family:arial;font-size:13px"><br></span></font></div><div style="font-family:Calibri,sans-serif;font-size:16px"><font face="Verdana"><span style="font-family:arial;font-size:13px">"Small steps toward a much better world"</span></font></div>
</div>