Can you check my error code?

Hello! Can you correct my code? Because I have some errors on my code.

%% Starting codes

x = linspace (-2,4,101);

span = [0 1 2];

for i = -1: 2

h1 = plot (x (x> (span (1) + i * 2) & x <(span (2) + i * 2)), ...

zeros (size (x (x> (span (1) + i * 2) & x <(span (2) + i * 2)))));

hold on;

h2 = plot (x (x> (span (2) + i * 2) & x <(span (3) + i * 2)), ...

ones (size (x (x> (span (2) + i * 2) & x <(span (3) + i * 2)))));

set (h1, 'linewidth', 3, 'color', 'b');

set (h2, 'linewidth', 3, 'color', 'b');

end

ylim ([-1 2]);

grid on;

title ('f (x) vs Fourier Series', 'front size', 16);

n = 0: 100;

for i = 1: length (x)

f (i) = 0.5-sum (2 / pi. * sin ((2 * n + 1) * pi * x (i)) ./ (2 * n + 1));

set (f (i), 'linewidth', 3, 'color', 'b');

end

plot (x, f, 'r');

hold off

And I got errors like the following:

Answer 1

[Ridwan Alam]

x = linspace (-2,4,101);
span = [0 1 2];
for i = -1: 2
    h1 = plot (x (x> (span (1) + i * 2) & x <(span (2) + i * 2)), ... 
        zeros (size (x (x> (span (1) + i * 2) & x <(span (2) + i * 2)))));
    hold on;
    h2 = plot (x (x> (span (2) + i * 2) & x <(span (3) + i * 2)), ...
        ones (size (x (x> (span (2) + i * 2) & x <(span (3) + i * 2)))));
    set (h1, 'linewidth', 3, 'color', 'b');
    set (h2, 'linewidth', 3, 'color', 'b');
end
ylim ([-1 2]);
grid on;
title ('f (x) vs Fourier Series', 'FontSize', 16); % not 'front size'
n = 0: 100;
for i = 1: length (x)
    f (i) = 0.5-sum (2 / pi. * sin ((2 * n + 1) * pi * x (i)) ./ (2 * n + 1));
     set (f (i), 'linewidth', 3, 'color', 'b');
end
plot (x, f, 'r');hold off;

[SEANGHAI THA]

Oh! Many thank for your help!

[Ridwan Alam]

Sure. Glad to help. Please accept the response as an answer.