Instead of exporting the graph as excel, I suggest using the FileWriter actor to write your values in a file. Best will be to use a VectorAssembler actor to create a new output which contains the CurrentTimeand your values. You will then feed the output of that actor to the input of FileWriteractor (double click on the actor to specify the name and location of the output file). BTW, you can search actor by name in the BCVTB package browser.