Linear regression modeling - Command Window

Dear,

I am trying to input the command in the filed Command window for Linear regression modeling.

After import my excel file (Motor), I need to know how to input the command for training data and test data.

So I need to know what do I need to write between the first and third command such as:

A = Motor

?

mdl = fitclm(dataTrain,'y');

yPred =predict(mdl,datatest);

...

Thanks for your support