Just run mtzdmp on your file and look at the data columns. The column label should be very obvious.
Cheers, Robbie Sent with my Windows Phone ________________________________ Van: Smith Liu<mailto:smith_liu...@163.com> Verzonden: 5-7-2015 10:01 Aan: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK> Onderwerp: [ccp4bb] on R-free label Dear All, Will you please tell me how to know whether my mtz file has the R-free label or not? SMith