To download the file, click on the hyperlink. If the file reads directly into your browser, right click on the link to prompt for a file save location.

• plot_2_order.m is used to compute and draw a graph of the amplitude response of a 2nd order mechanical oscillator.
• fftdem.m is used to demonstrate the use of the Fast Fourier Transform to perform spectral analysis on time series. For those of you who are using MathCAD, an equivalent file is Fft.mcd(v7) .
• A workspace that can be used to visualize the superposition of point sources for exploring the "method of images is" images.mcd. A copy of this worksheet saved in version 7 is imagesv7.mcd.