Error using plot Invalid data argument.

Why am I getting this message?? Error using plot, invalid data argument?

%% Tabulate Values

% Create x array
x = linspace(xmin, xmax, Nx);

% Create y array
y = cos((2*p*x)/(L));
%% Experimental Data

xexp = [1, 2, 3, 4, 5];
Trial1 = [0.38, -0.82, -0.79, 0.28, 0.93];
Trial2 = [0.36, -0.80, -0.88, 0.45, 1.10];
Trial3 = [0.22, -0.67, -0.94, 0.27, 0.98];

%% Plot Data

% Plot the x and y arrays.
plot(x, y, 'k-', 'LineWidth', 1, ... 
    xexp, Trial1, 'go(none)', ... 
    xexp, Trial2, 'rx(none', ... 
    xexp, Trial3, 'b*(none)' );

% Add axis labels
xlabel('x');
ylabel('y');

% Create title block
title( 'plotPractice' );

Answer 1

[KSSV]

% Plot the x and y arrays.
plot(x, y, 'k-', 'LineWidth', 1, ... 
    xexp, Trial1, 'go', ... 
    xexp, Trial2, 'rx', ... 
    xexp, Trial3, 'b*' );

% Add axis labels
xlabel('x');
ylabel('y');

% Create title block
title( 'plotPractice' );

Answer 2

[madhan ravi]

Remove (none)