Hello, ferreters,I have a data which timestep is from 1 to 1073. but the first 25 timesteps has no value. while using FFTA the error is coming saying missing data at L=1.I have used redefining axis command but it is in vain. Can you please help me to arrange the data such a way it will trim the first 25 timesteps and will start from 1 at 26th timestep.On Wed, Jan 24, 2018 at 1:02 PM, USHNANSHU DUTTA <ushnanshudutta@xxxxxxxxx> wrote:Hello ferreters,I have a data which timestep is from 1 to 1073. but the first 25 timesteps has no value. while using FFTA the error is coming saying missing data at L=1----