r-option does not work for vector outputs

Hello,

using the export_fig version from 22/03/17 and R2016b it makes no difference whether I type
`export_fig test_rstandard -pdf` or
`export_fig test_r50 -pdf -r50`
respectively
`export_fig test_rstandard -eps` or
`export_fig test_r50 -r50 -eps`

All output files have the same size (depending on output format) and appearance. Can you please help me?

Thanks in advance,
Christian