Dear Karl and Ryo
G'day
Thank you for your help the problem is sorted out from your suggestions. I would like to write the procedure for this for others as well.
$ conda env list !! it will show all the environment in your system !!!
FERRET * /home/srathore/anaconda3/envs/FERRET !! this is my ferret env path !!
$ conda activate FERRET !! to activate FERRET env !!
$ vi .bashrc
open the bash script and go to the end of the script as shown in the attached image and in the end of the file add the line path/of/your/FERRET-env/lib/python3.7/site-packages/pyferret depend on the path of your env (mine is /home/srathore/anaconda3/envs/FERRET) !!
save the file and close it.
now you can check the function
$ conda activate FERRET
(FERRET)$ pyferret -nojnl
yes? sh func student*
it will show you....
STUDENT_T_CUTOFF(P,nf)
Return student-t cutoff
P: Confidence Limit
nf: nf (Number in sample)
cheers, saurabh