public override bool Check(IEnumerable <double> data, out string errorMsg)
{
ConfigureParameters(data);
errorMsg = "";
if (OriginalStandardDeviation.IsAlmost(0.0))
{
errorMsg = "Standard deviaton for the original data is 0.0, Transformation cannot be applied onto these values.";
return(false);
}
return(true);
}
public override IEnumerable <double> Apply(IEnumerable <double> data)
{
if (OriginalStandardDeviation.IsAlmost(0.0))
{
return(data);
}
var old_m = OriginalMean;
var old_s = OriginalStandardDeviation;
var m = Mean;
var s = StandardDeviation;
return(data
.Select(d => (d - old_m) / old_s) // standardized
.Select(d => d * s + m));
}