Unable to plot the two for loops together.

clc
c = 1;
for w = 0:0.001:1.5
    
    J(c)= ((4*10^-7) * (exp(( (1.66*10^-19 * w) / (1.5*(1.38*10^-23)*298.15)-1))))-40;
    
    w_copy(c) = w;
    c = c+1;
end
d = 1;
for y = 0:0.001:1.5
    
    T(d)= ((4*10^-7) * (exp(( (1.66*10^-19 * y) / (1.5*(1.38*10^-23)*298.15)-1))));
    
    a_copy(d) = y;
    d = d+1;
end
plot(w_copy,J);
hold on
plot(a_copy,T);
hold on
grid minor
hold off

Answer 1

[Walter Roberson]

The two functions differ by 40 at every location.

40 is much less than the value of the function, which goes up to 5 x 10^10. A difference of 40 in 5E10 is insignificant for plotting purposes.