The output size of the last layer doesn't match the number of classes

Hello,

I used one pretrained network (vgg16) for my set of images. Vgg16 is trainned with 11 classes.

I want to redefine the number of classes to be 6. The problem appear at the last layer: the number of classes from the last Layer is 11, not 6.

I tried something like:

layersMine(2,1).ClassWeights = length(classNames);

layerMine(2,1).ClassNames(1:6) = classNames

How can I change the number of classes from the last layer to 6?

Can I redefine the last layer (classificationLayer)? How?