Column copier is not working

[Amit1150]

I followed the tutorial, and it's working. But while playing around I made changes in code e.g: changed [Column(ordinal: "1", name: "Label")] to [Column(ordinal: "1")] and then used ColumnCopier to copy that column to Label. like this pipeline.Add(new ColumnCopier("Sentiment","Label"));. But it's not working. It throws exception Source column 'Label' not found

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• ID: c8e22825-c4ee-5a36-f911-8ad456970ecc
• Version Independent ID: ad0bf640-7dfc-1184-077c-358bb14277a7
• Content: Use ML.NET in a sentiment analysis classification scenario
• Content Source: docs/machine-learning/tutorials/sentiment-analysis.md
• Service: unspecified
• Product: dotnet-ml
• GitHub Login: @JRAlexander
• Microsoft Alias: johalex

[svick]

As far as I can tell, if you want to copy from Sentiment to Label, you need new ColumnCopier(("Sentiment","Label")). Notice the double parentheses, which causes the creation of a tuple.

Does that work for you?

[Amit1150]

Thanks @svick. It's working now.

[mairaw]

Thanks @svick for jumping in and helping. I'll close this issue then.