Although the handle is not readily available as an output of "view", you can obtain the figure handle using the "findall" command. You can then save as a FIG file using the "saveas" command. Here is an example:
% Load data and make a table
load carsmall
tbl = table(Weight,Cylinders,MPG,Origin);
% Fit Classification Tree
tree = fitctree(tbl,'Origin');
% Call the view function
view(tree,'mode','graph');
% Obtain the handle
h = findall(0,'type','figure','Name','Classification tree viewer');
% Save file
saveas(h,'classTree.fig');
This method would still display the tree, but you would be able to save it from the Command Window.
