What does it mean by number of classes and number of example? Not able to understand it compleately
Bar Graph labels
Hey @Codecracaker532, number of classes means the total categories your training examples can take. So like here there are 2 classes only which each training sample can take i.e. Person is suffering from Diabetes and Person is not suffering from Diabetes . Also the total number of examples means the total samples that are given to you in the dataset.
I hope this clears your doubt ! 
Happy Learning ! 
So we basically have to plot a bar graph to show the number of samples that each class have?
Yes exactly.
I hope this clears your doubt ! 
Happy Learning ! 