Effect of zeropadding

[ApplestarGY]

Hi,

I am testing this package for wave propagation. One thing I noticed is that zeropadding the input array can affect the results of FRFT. As shown in the 1D case below, blue lines are results of the original example from the tutorial. Orange lines are the results after zeropadding the 1D data from 128 to 256. Obviously, the two results are consistent only at alpha=0 and alpha=2. I wonder if this is expected.