how to plot in matlab

Hi, how can I plot 3cos3x + 3sin3x in matlab?

thanks!

[Walter Roberson]

First write the expression in MATLAB syntax. MATLAB syntax does not have any implicit multiplication, and invocation of functions is always of the form FunctionName(parameter)

Once you have the expression in MATLAB syntax, enclose it in quotation marks, and pass that to fplot()

For example,

fplot('7+x^2')

Answer 1

[Image Analyst]

Try this:

x = linspace(-2*pi, 2*pi, 1000);
y = 3 * cos(3 * x) + 3 * sin(3 * x);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
fontSize = 24;
xlabel('x', 'FontSize', fontSize);
ylabel('y', 'FontSize', fontSize);
title('y = 3 * cos(3 * x) + 3 * sin(3 * x)', 'FontSize', fontSize);