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Posted to dev@systemml.apache.org by arijit chakraborty <ak...@hotmail.com> on 2017/04/21 20:42:50 UTC

Randomly Selecting rows from a dataframe

Hi,


Suppose I've a dataframe of 10 variables (X1-X10) and have 1000 rows. Now I want to randomly select rows so that I've a subset of the dataset.


Can anyone please help me to solve this problem?


I tried the following code:


randSample = sample(nrow(dataframe), 200);


This gives me a column matrix with position of the row randomly selected. But I could not able to solve how from this matrix I can subset data from original dataframe.


Thank you!


Arijit