Subscript all of them.
Try this:
a=750000; %staring amount
b=35000; %starting withdrawl
y=0; %years
while a>b
a=a-b;
a=a*1.045; %interest
b=b*1.015; %inflation rate
y=y+1; %year/time step
av(y) = a;
bv(y) = b;
yv(y) = y;
end
figure
yyaxis left
plot(yv,av)
yyaxis right
plot(yv,bv)
Since ‘y’ increments by 1 and is always an integer, it is convenient to use it as a counter and subscript.
