Dear all, I'm trying to filter out the "number of leaves" (it should be 1 in the example below) from the following string: > string [1] "Java-Object{J48 pruned tree\n------------------\n: 0 (15.0/3.0)\n \nNumber of Leaves : \t1\n\nSize of the tree : \t1\n}" Any idea how to do that as simple as possible? Thanks in advance for any advice. Regards, Andrej