时间t 位移x
0 1
1.65E-05 0.999983045
3.31E-05 0.99996526
4.96E-05 0.999946645
6.62E-05 0.999927199
0.000148853 0.999817534
0.000231549 0.999687168
0.000314245 0.999536141
0.000396941 0.999364493
0.000810422 0.998198388
0.001223903 0.996523048
0.001637383 0.99434393
0.002050864 0.991666701
0.004118267 0.971017254
0.00618567 0.938881651
0.008253073 0.896176808
0.010320476 0.843903563
0.013909462 0.733576368
0.017498447 0.60373725
0.021087433 0.460679539
0.024676419 0.310544505
0.028465691 0.150844979
0.032254963 -0.003353877
0.036044235 -0.145975632
0.039833507 -0.272127807
0.0429578 -0.360954094
0.046082092 -0.434033112
0.049206384 -0.490111668
0.052330677 -0.52857146
0.055954892 -0.551040245
0.059579108 -0.550371564
0.063203324 -0.528122443
0.06682754 -0.486716536
0.069973943 -0.437603602
0.073120347 -0.378637957
0.07626675 -0.312278735
0.079413154 -0.241010094
0.08317876 -0.152670404
0.086944367 -0.064957361
0.090709973 0.018408264
0.094475579 0.09442318
0.097733314 0.152397469
0.100991048 0.20177429
0.104248782 0.24165641
0.107506516 0.271553851
0.111244103 0.2933616
0.114981689 0.301924287
0.118719275 0.297806704
0.122456861 0.282036001
0.125608558 0.260685249
以上为采集到的数据,第一行为时间,第二行为位移,如何用matlab对这组数据进行傅里叶变化?如何画频谱图?
非常感谢各位回答!!!