[TreeNode, FeatMat, fw, finalLambda, o]=GreedyStructLearn_Cell_blk_RegPrev(X, y, trnInd, tstInd, 3, {[0.5];[0.5 1 2 5 7 10];[0.5 1 2 5 7 10]}, 50, 'err');o
o =

    0.0062
finalLambda =

    0.5000    2.0000
LR lambda=0.5  0.0103