You can read the source in a data frame. Then iterate over all rows with map and use something like below: df.map(x=>x(0).toString().toDouble)
Thanks Deepak On Tue, Dec 20, 2016 at 3:05 PM, big data <bigdatab...@outlook.com> wrote: > our source data are string-based data, like this: > col1 col2 col3 ... > aaa bbb ccc > aa2 bb2 cc2 > aa3 bb3 cc3 > ... ... ... > > How to convert all of these data to double to apply for mlib's algorithm? > > thanks. > > --------------------------------------------------------------------- > To unsubscribe e-mail: user-unsubscr...@spark.apache.org > > -- Thanks Deepak www.bigdatabig.com www.keosha.net
