æç³»åãã¼ã¿ã®ãã¼ãªã¨å¤æå¦çã¯ããã¼ã¿ã®å¨æ³¢æ°é åã§ã®ç¹å¾´æ½åºã®ããã«æ§ã ãªåéã§å©ç¨ããã¦ãã¾ãã æ©æ¢°å·¥å¦ã®åéã§ã¯ãå é度è¨ã§æ§é ç©ã®å é度ãã¼ã¿ãåå¾ãããã¼ã¿ãå¨æ³¢æ°è§£æããããããã¨ãå¤ãã¨æãã¾ãã fft é¢æ°ã§ã®ãã¼ã¿å¦çããããã¨ããå ´åãæç³»åãã¼ã¿ã¨å¨æ³¢æ°ãã¼ã¿ã¨ã®é¢ä¿ãç解ãã¦ãããªãã¨é©åãªãã¼ã¿å¦çãã§ãã¾ããã 以ä¸ã®ãããªç°¡åãªããã°ã©ã 㧠fft é¢æ°ã®ä½¿ãæ¹ã説æãã¦ããã¾ãã æç³»åã®ãµã³ãã«ãã¼ã¿ã¨ãã¦ããã¼ã¿æ° 512 ç¹ããµã³ããªã³ã°éé dt=0.01[sec]ãå¨æ³¢æ° f=20[Hz]ã® sin æ³¢ãä½æããããã fft é¢æ°ã§é¢æ£ãã¼ãªã¨å¤æãã¦ãã¾ãã import numpy as np from scipy.fftpack import fft import matplotlib.pyplot as plt from mpl_t
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