DataFrame.LoadCsv 方法

参考

定义

命名空间:: Microsoft.Data.Analysis

程序集:: Microsoft.Data.Analysis.dll

包:: Microsoft.Data.Analysis v0.21.1

重要

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重载

LoadCsv(Stream, Char, Boolean, String[], Type[], Int64, Int32, Boolean, Encoding, Boolean, CultureInfo)	将可查找的 CSV 数据流读入数据帧。
LoadCsv(String, Char, Boolean, String[], Type[], Int32, Int32, Boolean, Encoding, Boolean, CultureInfo)	以数据帧的形式读取文本文件。

LoadCsv(Stream, Char, Boolean, String[], Type[], Int64, Int32, Boolean, Encoding, Boolean, CultureInfo)

将可查找的 CSV 数据流读入数据帧。

public static Microsoft.Data.Analysis.DataFrame LoadCsv (System.IO.Stream csvStream, char separator = ',', bool header = true, string[] columnNames = default, Type[] dataTypes = default, long numberOfRowsToRead = -1, int guessRows = 10, bool addIndexColumn = false, System.Text.Encoding encoding = default, bool renameDuplicatedColumns = false, System.Globalization.CultureInfo cultureInfo = default);

static member LoadCsv : System.IO.Stream * char * bool * string[] * Type[] * int64 * int * bool * System.Text.Encoding * bool * System.Globalization.CultureInfo -> Microsoft.Data.Analysis.DataFrame

Public Shared Function LoadCsv (csvStream As Stream, Optional separator As Char = ',', Optional header As Boolean = true, Optional columnNames As String() = Nothing, Optional dataTypes As Type() = Nothing, Optional numberOfRowsToRead As Long = -1, Optional guessRows As Integer = 10, Optional addIndexColumn As Boolean = false, Optional encoding As Encoding = Nothing, Optional renameDuplicatedColumns As Boolean = false, Optional cultureInfo As CultureInfo = Nothing) As DataFrame

参数

csvStream: Stream

要读取的 CSV 数据流

separator: Char

列分隔符

header: Boolean

是否具有标头

columnNames: String[]

列名 (可以为空)

dataTypes: Type[]

列类型 (可以为空)

numberOfRowsToRead: Int64

要读取的行数，不包括标头 (（如果存在)

guessRows: Int32

用于猜测类型的行数

addIndexColumn: Boolean

使用行索引添加一列

encoding: Encoding

字符编码。如果未指定，则默认为 UTF8

renameDuplicatedColumns: Boolean

如果设置为 true，则具有重复名称的列会自动重命名。

cultureInfo: CultureInfo

用于设置值格式的区域性信息

DataFrame

适用于

LoadCsv(String, Char, Boolean, String[], Type[], Int32, Int32, Boolean, Encoding, Boolean, CultureInfo)

以数据帧的形式读取文本文件。

public static Microsoft.Data.Analysis.DataFrame LoadCsv (string filename, char separator = ',', bool header = true, string[] columnNames = default, Type[] dataTypes = default, int numRows = -1, int guessRows = 10, bool addIndexColumn = false, System.Text.Encoding encoding = default, bool renameDuplicatedColumns = false, System.Globalization.CultureInfo cultureInfo = default);

static member LoadCsv : string * char * bool * string[] * Type[] * int * int * bool * System.Text.Encoding * bool * System.Globalization.CultureInfo -> Microsoft.Data.Analysis.DataFrame

Public Shared Function LoadCsv (filename As String, Optional separator As Char = ',', Optional header As Boolean = true, Optional columnNames As String() = Nothing, Optional dataTypes As Type() = Nothing, Optional numRows As Integer = -1, Optional guessRows As Integer = 10, Optional addIndexColumn As Boolean = false, Optional encoding As Encoding = Nothing, Optional renameDuplicatedColumns As Boolean = false, Optional cultureInfo As CultureInfo = Nothing) As DataFrame

参数

filename: String

filename

separator: Char