Sheet to read. Either a string (the name of a sheet), or
an integer (the position of the sheet). Defaults to the first sheet.
col_names
Either TRUE to use the first row as column names,
FALSE to number columns sequentially from X1 to Xn,
or a character vector giving a name for each column.
col_types
Either NULL to guess from the spreadsheet or a
character vector containing "blank", "numeric", "date" or "text".
na
Missing value. By default readxl converts blank cells to missing
data. Set this value if you have used a sentinel value for missing values.
skip
Number of rows to skip before reading any data.
Examples
datasets <- system.file("extdata/datasets.xlsx", package = "readxl")
read_excel(datasets)
# Specific sheet either by position or by name
read_excel(datasets, 2)
read_excel(datasets, "mtcars")
providing 
.