I have a problem with SPSS. For publishing of an article the journal needs two graphs (kaplan-meier-plots) in a specific resolution (1000 dpi), width (16,8cm) and data format (.tif, .eps or .pdf). I have no idea how to do it. At first I simply adjusted the width in the output viewer of spss and used export to save the graph as .tif, but the resolution was far too low.
Any idea how I can get the correct resolution in my exported graphs? I am using SPSS23. For working with pictures I am using gimp, but do not have any special software like Adobe Acrobat or Photoshop.