```{r,include=F}
# Configuração global
require(knitr)
opts_chunk$set(echo = F,comment="",message=" ")
```

```{r}

require(gdata, quietly = TRUE)
gdata: read.xls support for 'XLS' (Excel 97-2004) files ENABLED.
gdata: read.xls support for 'XLSX' (Excel 2007+) files ENABLED.
Attaching package: ‘gdata’
The following object is masked from ‘package:stats’:
nobs
The following object is masked from ‘package:utils’:
object.size
The following object is masked from ‘package:base’:
startsWith

```

Obrigado!