Why wont my code plot anything

clear
for n = 1:10
    e = 1/factorial(n);

end

disp('calculated value for e = ')
disp(e)
percent_error = e/exp(1)*100
plot(1:10,e)

Answer 1

[Voss]

It doesn't appear to plot because e is a scalar. e is a scalar because it's overwritten each time through the loop.

Instead, make e a vector, one element of which is calculated each time through the loop. Then the plot will show up:

clear
for n = 1:10
%     e = 1/factorial(n);
    e(n) = 1/factorial(n);
end
disp('calculated value for e = ')

calculated value for e = 

disp(e)

    1.0000    0.5000    0.1667    0.0417    0.0083    0.0014    0.0002    0.0000    0.0000    0.0000

percent_error = e/exp(1)*100

percent_error = 1×10

36.7879 18.3940 6.1313 1.5328 0.3066 0.0511 0.0073 0.0009 0.0001 0.0000

plot(1:10,e)

[james Green]

thanks for the answer, i saw alot of people talking about scalers and vectors in similar questons but didnt understand how to make e a vector seems so simple now. thanks

[Voss]

You're welcome! Yep, it's easy when you know how.