If you wish to use other tools to plot the data, you can first take a sample of the Spark data and plot it using another package such as ggplot
. Note that some versions of Spark may now have ggplot integrated and available for use within Spark. However this example will show another example of extracting data which can be used by other packages.
We will take a 2% sample of all of the predictions and then print some of the results. Note that the Spark sample function has a different syntax from the base R sample function we used earlier. You could also specify this as SparkR::sample
to make sure you are invoking the correct function:
local = collect(sample(preds, F,.02)) head(local)