Closed
Description
System information
- OS Windows 10:
- .NET Version 2.1.300-rc1-008673:
Issue
- What did you do?
I move my code from ML.NET version 0.1.0 to ML.NET version 0.2.0. I have a data structure FlightData
looks like following. Then I use pipeline.Add(new TextLoader(trainingDataSet).CreateFrom<FlightData>(useHeader: true, separator: ',', allowQuotedStrings:true));
to load the data.
public class FlightData
{
[Column(ordinal: "0")]
public float QUARTER;
[Column(ordinal: "1")]
public float MONTH;
[Column(ordinal: "2")]
public float DAY_OF_MONTH;
[Column(ordinal: "3")]
....
}
- What happened?
Error message:
Unhandled Exception: System.InvalidOperationException: DAY_OF_MONTH is not alphanumeric.
at Microsoft.ML.Data.TextLoader.CreateFrom[TInput](Boolean useHeader, Char separator, Boolean allowQuotedStrings, Boolean supportSparse, Boolean trimWhitespace)
After looking at the error msg and ML.NET source code https://github.com/dotnet/machinelearning/blob/master/src/Microsoft.ML/Data/TextLoader.cs#L87, I change DAY_OF_MONTH
to DAYOFMONTH
. Then the error disappears. But it's common to use _
in the variable names.
- What did you expect?
I can use _
in variable names, which are part of Input fed to TextLoader.
Source code / logs
Please paste or attach the code or logs or traces that would be helpful to diagnose the issue you are reporting.