Expert: George Moustris - 11/9/2011

Question
How can i create triangular and square function graphs

Answer
You can use the plot command in the form of plot(x_vector,y_vector), where x_vector is a vector of xi values and y_vector is a vector of yi values corresponding to xi. thus you must select each point you want to plot and then find its x,y value and put it in the vector.
Example:
plot a single triangle.
First vertex is a x=0, second is at x=10 and third is at x=20. Thus, x_vector=[0,10,20];
The y value of the first vertex is y=0, the second is y=15 and the third is y=0, so y_vector=[0 15 0];
To plot the triangle use plot(x_vector,y_vector) and you will see a triangle with one edge laying on the x-axis.
Square waves are plotted using a similar position. I believe that matlab already has functions that produce triangular and square signals. Check the help page.

Best
G.