求matlab达人！！如何对采集到的数据进行傅里叶变化，如何画出频谱图？

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 ... 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，diyi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！！！