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2010 Jul 08
2
random sample from arrays
...sers, I'm trying to extract random samples from a big array I have. I have a data frame of over 40k lines and would like to produce around 50 random sample of around 200 lines each from this array. this is the matrix ID xxx_1c xxx__2c xxx__3c xxx__4c xxx__5T xxx__6T xxx__7T xxx__8T yyy_1c yyy_1c _2c 1 A_512 2.150295 2.681759 2.177138 2.142790 2.115344 2.013047 2.115634 2.189372 1.643328 1.563523 2 A_134 12.832488 12.596373 12.882581 12.987091 11.956149 11.994779 11.650336 11.995504 13.024494 12.776322 3 A_152 2.063276 2.160961 2.067549 2.059732 2.656416 2.075775 2.033...