I want to include in a return function, an additional filter:
I close the function with
return(mp_fmp[delta_fr != 0])
however, I would like to add an additional filter, such as:
return(mp_fmp[delta_fr != 0 & f_vol.t1 > 0])
apparently there is sth wrong with the new (condition= & f_vol.t1 > 0) additional filter, but I can not figure it out from the syntaxis.
Could you please help me?
Many thanks and regards