Here are three options in order of best-practice. They all produce the same plot. Feel free to ask any follow-up questions.
%% Option 1: don't use a loop at all
x = 0 : pi/100 : 2*pi; % produce your x-data (vector)
w = 1:5; % these are your factors (vector)
y = sin(w' * x); % produce your y data; note the transpose (') (matrix)
plot(x,y) % Plot the data
%% Option 2: collect data within loop, then plot it.
x = 0 : pi/100 : 2*pi;
w = 1:5;
yMat = zeros(length(x), length(w)); %produce an empty matrix where we'll store loop data
for i = 1:length(w) %Loop through each factor
yMat(:,i) = sin(w(i) * x); %store the y-data
end
plot(x, yMat)
%% Option 3: plot data within loop
x = 0 : pi/100 : 2*pi;
w = 1:5;
figure;
axh = axes; %create the empty axes
hold(axh, 'on') %hold the axes
for i = 1:length(w)
y = sin(w(i) * x); % produce temporary y-data
plot(axh, x,y) % plot the single line
end
