The errorbar function may do what you want:
x = 1:3; % Independent Variable
y = [1 2 3 % Dependent Variable Matrix
4 5 6
7 8 9];
y_mean = mean(y,2); % Mean
y_se = sqrt(var(y,[],2)/size(y,2)); % Standard Error Of The Mean (Data At Each ‘x’ Are Rows)
figure(1)
errorbar(x, y_mean, y_se)
grid
axis([0 4 ylim])
Note — In the mean, var, and size function calls, the ‘2’ refers to calculating or referencing along the rows (so calculating it for each row) of the ‘y’ matrix.
If you wanted to calculate down the columns instead, you would either use ‘1’ or use nothing at all, since calculating down the columns is the way MATLAB does its calculations (by default).
