Hi , I am using randomForest model in R . For large number of tree my program takes long time to complete . In "randomForest" function i can use "do.trace=TRUE" to see the real time progress . Sample out put in real time on R console is as follows ntree OOB 1 2 3 4 5 6 7 8 9 100: 2.31% 7.14% 2.08% 0.00% 2.25% 10.81% 0.90% 0.00% 0.00% 1.72% 200: 1.95% 7.14% 2.08% 0.00% 2.25% 8.11% 0.00% 0.00% 0.00% 1.72% 300: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 400: 1.95% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 3.45% 500: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 600: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 700: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 800: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 900: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% 1000: 1.78% 7.14% 2.08% 0.00% 1.69% 8.11% 0.00% 0.00% 0.00% 1.72% The first row (100: 2.31% ....) comes first. After 1 second it comes 2nd row and so on. Now i like to modify this out put . like, when 1st row will come , i like to grab only 100 form the whole line and show only 100 on R console instead of showing whole line. The same this will happen for rest of the row. [ i tried sink(). but it will not work as sink write the complete output to out file ] [I searched for do.trace option in randomForest function. but i lost myself as i feel it call come C program. not sure but could not figured it out] In general, i like to grab the real time output on R console. I will be very grateful if any one please help me with . Thank you Tanvir Ahamed G?teborg, Sweden | mashranga at yahoo.com