Basics of MATLAB and Beyond

comet(x,y)(You can get a three-dimensional version by using comet3.) You can seeit on your screen. But we have just illustrated a disadvantage of sucha display: you have to be there. I cannot communicate to you whatit looks like on paper. For that you need to resort to, say, an array oftwo-dimensional plots strung out along the third time dimension. Thisgets us into the subject of plot arrays, which is discussed in Section 32.3on page 123.22 SPToolSPTool (in the Signal Processing Toolbox) is a graphical user interfaceto many of matlab’s signal processing functions. The idea is to importsignals from the matlab workspace into the SPTool environment wherethey can be manipulated in a great variety of ways. As an example, loadsome data into your workspace by typing:load mtlbWe will use SPTool to look at this time-series data and calculate variouspower spectra. Invoke SPTool by typing:sptoolChoose the File→Import menu item to open the import panel, whichallows you to control the variables that sptool can “see”:c○ 2000 by CRC Press LLC