Introduction - If you have any usage issues, please Google them yourself
MATLAB provides a number of drawing options to determine the lines, colors, and data point symbols of the drawn curves, which can be used in combination. For example, "b-." means blue dotted lines, "y:d" stands for yellow dotted lines, and marks data points with diamonds. When the option is omitted, the MATLAB specifies that the lines are all solid, drawn in the default color order.