If y is a matrix and x is a vector, the rows or columns of y are plotted against the elements of x. In this instance, the number of rows OR columns in the matrix must correspond to the number of elements in 'x'. Recall the row vectors 'x' and 'y' defined earlier. You may wish to present data points and omit any connecting lines between these points. Lines can be colored and they can be broken to make distinctions among more than one line.
Colored lines are effective on the color monitor and color printers or plotters.
Colors are useless on the common printers used on this network. The following command plots the x,y data in red solid line and the r,s data in broken green line. Executing the 'print' command will send the contents of the current graphics widow to the local printer. You may wish to save in a graphics file, a plot you have created. To do so, simply append to the 'print' command the name of the file.