xspec commands in isis

Is there no command to obtain the eqwidth of a line in isis?

the manual pages showing equivalence between isis and xspect
lists:

eqwidth          -

Also the Xspec flux command only gives an energy range:

 XSPEC>flux 6.4 7.0 	


What is the hist-index in the isis equivalent?


flux            region_flux (hist_index, xmin, xmax [,ymin, ymax])
                        region_counts(hist_index, rmin, rmax [, ymin, ymax])


thanks,
Saku

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