Annotating Plots

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Graphs without labels are incomplete and labeling elements such as plot title, labels for x and y axes, and legend should be included. Using up arrow, recall the statement above and add the annotation commands as shown below.

x=[-pi:.1:pi];y=sin(x);plot(x,y);title('Graph of y=sin(x)');xlabel('x');ylabel('sin(x)');grid on

Run the file and compare your result with the first one.

Figure 3.3 Graph of sin(x) with Labels. 

 

ASIDE: Type in the following at the MATLAB prompt and learn additional commands to annotate plots:

help gtext

help legend

help zlabel