private HistogramData GetValleysHistogram(string columnId)
{
var histogram = new HistogramData();
var histogramFields = new Dictionary <double, List <int> >();
double lastValue = 0;
bool increasing = true;
foreach (var field in Data.Fields)
{
if (field.Invalid)
{
continue;
}
double?value = field.GetValue(columnId);
if (!value.HasValue)
{
continue;
}
if (value < lastValue)
{
increasing = false;
}
else if (value > lastValue)
{
if (!increasing)
{
histogram.Add(lastValue);
List <int> fields;
histogramFields.TryGetValue(lastValue, out fields);
if (fields == null)
{
fields = new List <int>();
}
fields.Add(field.FieldNumber);
histogramFields[lastValue] = fields;
}
increasing = true;
}
lastValue = value.Value;
}
return(histogram);
}
private HistogramData GetValuesHistogram(string columnId)
{
var histogram = new HistogramData();
foreach (var field in Data.Fields)
{
if (field.Invalid)
{
continue;
}
double?value = field.GetValue(columnId);
if (!value.HasValue)
{
continue;
}
histogram.Add(value.Value);
}
return(histogram);
}