public static StreamingDataFrame ReadCsv(string[] filenames,
char sep = ',', bool header = true,
string[] names = null, ColumnType[] dtypes = null,
int nrows = -1, int guess_rows = 10,
Encoding encoding = null, bool useThreads = true,
bool index = false, IHost host = null)
{
return(new StreamingDataFrame(DataFrameIO.ReadCsvToTextLoader(filenames, sep, header, names, dtypes, nrows, guess_rows,
encoding, useThreads, index, host)));
}
/// <summary>
/// Converts the data frame into a string.
/// </summary>
public override string ToString()
{
using (var stream = new MemoryStream())
{
DataFrameIO.ViewToCsv(this, stream);
stream.Position = 0;
using (var reader = new StreamReader(stream))
return(reader.ReadToEnd().Replace("\r", "").TrimEnd(new char[] { '\n' }));
}
}
/// <summary>
/// Converts the data frame into a string.
/// Every vector column is skipped.
/// </summary>
public override string ToString()
{
var df = HasVectorColumn() ? Flatten() : this;
using (var stream = new MemoryStream())
{
DataFrameIO.ViewToCsv(df, stream, silent: true);
stream.Position = 0;
using (var reader = new StreamReader(stream))
return(reader.ReadToEnd().Replace("\r", "").TrimEnd(new char[] { '\n' }));
}
}
/// <summary>
/// Saves the dataframe as a file.
/// </summary>
/// <param name="filename">filename</param>
/// <param name="sep">column separator</param>
/// <param name="header">add header</param>
/// <param name="encoding">encoding</param>
/// <param name="silent">Suppress any info output (not warnings or errors)</param>
public void ToCsv(string filename, string sep = ",", bool header = true,
Encoding encoding = null, bool silent = false, IHost host = null)
{
DataFrameIO.ViewToCsv(this, filename, sep: sep, header: header, encoding: encoding, silent: silent, host: host);
}
/// <summary>
/// Converts into <see cref="DataFrame"/>.
/// </summary>
/// <param name="sep">column separator</param>
/// <param name="nrows">number of rows to read</param>
/// <param name="keepVectors">keep vectors as they are</param>
/// <param name="numThreads">number of threads to use to fill the dataframe</param>
/// <returns><see cref="DataFrame"/></returns>
public DataFrame ToDataFrame(int nrows = -1, bool keepVectors = false, int?numThreads = 1)
{
return(DataFrameIO.ReadView(Source, nrows, keepVectors, numThreads, _env));
}