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Understanding multi-column vectors #9962

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Is there a difference between using a single vector to represent multiple columns opposed to having each column be separately defined?

For example, as the documentation shows:
new TextLoader.Column("FeatureVector", DataKind.R4, 0, 9),

Would this be different to something like:

new TextLoaderColumn("FeatureColumn0", DataKind.R4, 0),
...
new TextLoader.Column("FeatureColumn9", DataKind.R4, 9),

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