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Portable Network Graphic  |  1994-04-29  |  3.7 KB  |  417x185  |  1-bit (2 colors)
   ocr: Periodograms Periodograms can be used to look for cyclical patterns, frequencies 0 periodicities In data. For this kind of analysis, data is decomposed int sine and cosine waves of ditterent amplitudes and wavelengths. The CI the sine and cosine are used with the data to construct a value, callec similar to a sum of squares In an analysis of varance sense. TheSave Periodogranption in the Control Charts ($) popup menu ger DaJMP data table with columns for period, trequency, sine, and COS coefficients, periodogram, and smoothed periodogram "Dar plot of periodogram by frequency or a plot of perio ...