public static IDataView ApplyConcatOnSources(IHostEnvironment env, ManyToOneColumn[] columns, IDataView input)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(columns, nameof(columns));
env.CheckValue(input, nameof(input));
IDataView view = input;
var concatCols = new List <ConcatTransform.Column>();
foreach (var col in columns)
{
env.CheckUserArg(col != null, nameof(WordBagTransform.Arguments.Column));
env.CheckUserArg(!string.IsNullOrWhiteSpace(col.Name), nameof(col.Name));
env.CheckUserArg(Utils.Size(col.Source) > 0, nameof(col.Source));
env.CheckUserArg(col.Source.All(src => !string.IsNullOrWhiteSpace(src)), nameof(col.Source));
if (col.Source.Length > 1)
{
concatCols.Add(
new ConcatTransform.Column
{
Source = col.Source,
Name = col.Name
});
}
}
if (concatCols.Count > 0)
{
var concatArgs = new ConcatTransform.Arguments {
Column = concatCols.ToArray()
};
return(ConcatTransform.Create(env, concatArgs, view));
}
return(view);
}
public static CommonOutputs.TransformOutput ConcatColumns(IHostEnvironment env, ConcatTransform.Arguments input)
{
Contracts.CheckValue(env, nameof(env));
var host = env.Register("ConcatColumns");
host.CheckValue(input, nameof(input));
EntryPointUtils.CheckInputArgs(host, input);
var xf = new ConcatTransform(env, input, input.Data);
return(new CommonOutputs.TransformOutput {
Model = new TransformModel(env, xf, input.Data), OutputData = xf
});
}
