Downsampling from 100Hz to 60 Hz I have two sensors measuring a single time varying signal . The first sensor  (reference sensor) is sampling the data at 60 Hz and the second sensor (test sensor) is sampling the data at 60 Hz.  I need to check the accuracy of the test sensor by comparing with the reference sensor. I am confused about how to downsample the data recorded at 100 Hz to 60 Hz.  I see it is quite trivial to downsample from 100 Hz to 50Hz/25 Hz. But I am confused how to downsize to 60 Hz. 

After downsampling, is cross-correlation a good technique to compare the data from two sensors?

Can you please help?

Thanks,
Peter
Are the samples adhering to Nyquist (properly pre filtered)?
If so, I would just resample to one common rate, prefereable &gt;= max(rate1, rate2). And align them in time. Check out MATLABs resample() function.
If the samples are not adhering to Nyquist, then you need to think about what they represent, how they are sampled and in what respect you need to compare them.