In short you cannot do a(1)=[]; where as you can do a temp=[];
try this...
no_plt = input('number of plate =');
A = input('frontal area of plate =');
if isempty(A)
A = 1;
end
k = zeros(1,no_plt);
x = zeros(1,no_plt);
if no_plt == 1
k = input('plate conductivity =');
x = input('plate thickness =');
else
for m = 1:no_plt
temp1 = input (sprintf('conductivity of plate %d =',m));
if isempty (temp1)
k(m) = 0;
else
k(m) = temp1;
end
temp2 = input (sprintf('thickness of plate %d =',m));
if isempty (temp2)
x(m) = 0;
else
x(m)=temp2;
end
end
end
