You can use the cubic spline software you developed, coupled with some graphics, to draw smooth curves to represent a figure you wish to draw on the computer. Overlay a piece of graph paper on a picture or drawing that you wish to produce on a computer. Record enough data to gain smooth curves ultimately. Take more data points where there are abrupt changes (Figure 4.31).

Figure 4.31

For Projects 2-9, use the software you developed in Project 1 to find the splines that pass through the given data points. Use graphics software, if available, to sketch the resulting splines.