Getting Started

Creating a Plot

The plot function has different forms, depending on the input arguments. If y is a vector, plot(y) produces a piecewise linear graph of the elements of y versus the index of the elements of y. If you specify two vectors as arguments, plot(x,y) produces a graph of y versus x.

For example, these statements use the colon operator to create a vector of x values ranging from zero to 2, compute the sine of these values, and plot the result.

x = 0:pi/100:2*pi;
y = sin(x);
plot(x,y)

Now label the axes and add a title. The characters \pi create the symbol .

xlabel('x = 0:2\pi')
ylabel('Sine of x')
title('Plot of the Sine Function','FontSize',12)

Graphics

Multiple Data Sets in One Graph