public static DataFrame ToDataFrame(this TabularDataResource tabularDataResource)
{
if (tabularDataResource == null)
{
throw new ArgumentNullException(nameof(tabularDataResource));
}
var dataFrame = new DataFrame();
foreach (var fieldDescriptor in tabularDataResource.Schema.Fields)
{
switch (fieldDescriptor.Type)
{
case TableSchemaFieldType.Number:
dataFrame.Columns.Add(new DoubleDataFrameColumn(fieldDescriptor.Name, tabularDataResource.Data.Select(d => Convert.ToDouble(d[fieldDescriptor.Name]))));
break;
case TableSchemaFieldType.Integer:
dataFrame.Columns.Add(new Int64DataFrameColumn(fieldDescriptor.Name, tabularDataResource.Data.Select(d => Convert.ToInt64(d[fieldDescriptor.Name]))));
break;
case TableSchemaFieldType.Boolean:
dataFrame.Columns.Add(new BooleanDataFrameColumn(fieldDescriptor.Name, tabularDataResource.Data.Select(d => Convert.ToBoolean(d[fieldDescriptor.Name]))));
break;
case TableSchemaFieldType.String:
dataFrame.Columns.Add(new StringDataFrameColumn(fieldDescriptor.Name, tabularDataResource.Data.Select(d => Convert.ToString(d[fieldDescriptor.Name]))));
break;
default:
throw new ArgumentOutOfRangeException();
}
}
return(dataFrame);
}
public static TabularDataResourceJsonString Create(IReadOnlyDictionary <string, Type> fields, IEnumerable <IDictionary <string, object> > data)
{
var schema = new TableSchema();
foreach (var entry in fields)
{
schema.Fields.Add(new TableSchemaFieldDescriptor(entry.Key, entry.Value.ToTableSchemaFieldType()));
}
var tabularDataSet = new TabularDataResource(schema, data);
return(tabularDataSet.ToJsonString());
}