Working with YCML Dataframes

Using the YCDataframe class, it is easy to prepare your data. To add examples to an instance of YCDataframe, call the -addSampleWithData: method, passing a NSDictionary with the data to be added. If the attributes indicated in the supplied dictionary are not in the dataframe yet, they are created automatically (including data). The example below shows how to create a new dataframe, and add a couple of records:

YCDataframe *frame = [YCDataframe dataframe];
[frame addSampleWithData:@{@"X1" : @1.0, @"X2" : @2.0, @"X3" : @-5.0}];
[frame addSampleWithData:@{@"X1" : @5.5, @"X2" : @-3.0, @"X3" : @-1.5}];

With two dataframes, one for input (independent variables) and one for output (dependent variables), you may easily train a predictive model, as described previously.