Not exactly sure what formula you want to plot but I think it would be more like this:
clc; % Clear the command window.
fprintf('Beginning to run %s.m.\n', mfilename);
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
clear global;
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
x = -pi : 0.01 : pi;
theSum = zeros(1, length(x));
for n = 1 : 10
theSum = theSum + (pi + (-2./n*cos(n*pi*x) .* sin(n*x)));
subplot(10, 1, n);
plot(x, theSum, 'b.-', 'LineWidth', 2)
grid on;
drawnow;
caption = sprintf('n = %d', n);
title(caption, 'FontSize', 15);
end
g = gcf;
g.WindowState = 'maximized';
fprintf('Done running %s.m.\n', mfilename);
