[Wien] Utility in WIEN2K for polynomial fitting

[Jyoti]

Dear Wien users, 
        I was wondering if there is a utility program for polynomial fitting of a X Y data set in WIEN2K, (though off course the required fitting can be done using  any graphic packages on the desktop).I tried to use Curve_lapw but somehow didn"t understand how it is operating. It asks for the first column to fit etc etc which is not very clear, I have been able to use eplot_lapw though very nicely for eos fitting using M or B-M EOS. Looking forward to your responses.  
Thanks 
Jyoti            


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