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View read.table parameters

Read.table () parameter

If you need to know more about the definition, you can enter? read.table in R

Read.table (file, header = FALSE, sep = ", quote ="\ "'", dec = ".", numerals = c ("allow.loss", "warn.loss", "no.loss"), row.names, col.names, as.is =! stringsAsFactors, na.strings = "NA", colClasses = NA, nrows =-1, skip = 0, check.names = TRUE, fill =! blank.lines.skip Strip.white = FALSE, blank.lines.skip = TRUE, comment.char = "#", allowEscapes = FALSE, flush = FALSE, stringsAsFactors = default.stringsAsFactors (), fileEncoding = "", encoding = "unknown", text, skipNul = FALSE)

The header first line question, a logical value, reflects whether the first line of the file contains the variable name.

Sep delimiter problem, field separator in the file, if read tab delimited file using "\ t"

A quote reference that specifies the characters used to surround character-type data

A character used by dec to indicate the decimal point

Row.names holds the sequence number or name of a variable in the live vector file of the line name. The default line number is 1 ~ 2 ~ 3,.

Col.names specifies the character type vector of the column name. By default, it is V1menV2recoverV3, …

Whether an as.is character variable is converted to a factor variable (for example, the result value is FALSE), TRUE retains it as a character. As.is can be a logical, numerical or character vector to determine whether a variable is retained as a character.

The missing value of na.strings, which is represented by NA by default.

ColClasses specifies a character vector for each column data type

The maximum number of rows that can be read by nrows.-1 means all are read.

Skip skip=n means to skip the first n lines of the file

If check.names is TRUE, check whether the variable name is valid in R

If fill is TRUE and the number of variables in all rows is the same, fill in the blanks

Strip.white removes extra spaces before and after character variables if TRUE is specified by sep

If blank.lines.skip is TRUE, ignore blank lines

Comment.char comments. The default # in R language is comment content. When a character is used to write comments in the data file, lines starting with this will be ignored (to disable this parameter, you can use comment.char= "")

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