Hi Bijay,

You can use m=loadcase('case') to load each data in m as structure.
m.baseMVA, m.gen, m.bus, m.branch, m.gencost.
For total number of buses:
i.e.
m = loadcase(case30);
nbus = numel(m.bus(:,1));

I hope this will help.

-- 
regards
Deep Kiran

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