close all
clear all

% copy and paste your row of data into x
x=[77.88186005	78.85699072	79.64459627	80.58222192	80.46970685	80.81975376	80.78224873	80.50721187	80.81975376	80.96977386	81.4073325	81.16980067	80.99477721	81.04478391	80.86976046	81.5073459	81.85739281	82.54498496	82.45747323	81.91990119	81.56985428	80.88226213	80.81975376	80.58222192	80.36969344	80.14466329	79.732108	78.78198067	78.11939188	78.43193376	78.74447565	78.83198737	79.24454266	78.99450915	78.79448235	78.36942539	78.33192036	78.54444884	78.44443544	78.94450245	79.08202088	78.65696392	78.34442203	77.94436842	77.48180643	77.64432821	77.9068634	78.1068902	77.91936507	77.66933157	77.31928465	77.36929136	78.19440193	78.53194717	79.08202088	79.49457617	79.10702423	79.10702423	79.00701083	79.0195125	79.69460297	80.24467669	80.81975376	80.90726548	81.25731239	81.51984758	82.09492464	83.22007543	83.79515249	84.50774799	84.99531333	84.69527312	84.58275804	84.05768768	83.9951793	83.98267762	84.07018935	83.9951793	83.79515249	82.79501846	82.18243637	80.99477721	80.15716496	79.80711805	79.55708454	78.85699072	77.76934497	77.25677628	76.54418078	76.06911712	75.90659534	76.14412717	76.40666235	76.70670256	76.76921094	76.1816322	75.99410707	75.70656853	75.79408026	76.01911042	76.4316657	77.50680979	77.88186005	78.63196057	79.55708454	80.28218172	81.38232915	82.33245648	83.14506537	83.85766087	83.49511228	82.85752684	82.45747323	82.1699347	82.23244307	82.05741962	82.33245648	82.10742632	81.36982747	81.18230234	80.98227554	81.28231575	81.71987438	81.69487103	81.3073191	80.81975376	80.21967334	79.33205439	78.83198737	78.70697062	78.75697732	78.75697732	78.45693711	77.93186675	77.78184664	77.43179973	77.58181984	78.0568835	78.44443544	78.769479	79.03201418	78.94450245	78.93200078	78.49444214	78.70697062	78.80698402	79.38206109	79.98214151	79.8321214	79.41956612	79.35705774	78.85699072	78.89449575	79.61959292	80.04464988	80.29468339	80.29468339	80.21967334	79.98214151	80.30718507	81.25731239	81.93240286	82.40746653	82.2699481	82.61999501	82.51998161	82.15743302	82.29495145	82.63249668	82.75751344	82.63249668	82.43246988	82.10742632	81.80738611	81.86989449	82.25744642	82.68250339	82.82002181	82.92003522	83.24507878	83.09505867	82.35745983	81.65736601	80.83225543	79.96963983	79.59458957	79.39456277	79.43206779	79.20703763	78.99450915	78.39442874	78.20690361	77.91936507	77.94436842	78.23190696	78.40693041	79.06951921	79.00701083	78.9695058	78.94450245	78.59445554	78.30691701	78.7194723	79.35705774	79.81961973	80.36969344	81.25731239	81.4073325	81.73237606	81.96990789	82.2699481	82.77001511	83.74514579	84.27021616	85.38286526	86.29548757	86.80805626	86.98307971	87.2956216	87.19560819	86.78305291	86.40800264	86.20797584	86.27048422	85.73291217	85.007815	84.8577949	83.82015584	82.93253689	82.00741292	81.00727889	80.53221522	80.41970015	80.51971355	80.14466329	79.70710465	78.68196727	78.1568969	77.28177963	77.03174612	76.51917743	76.40666235	76.83171932	76.93173272	77.51931146	77.74434162	77.74434162	77.9068634	78.09438853	78.1068902	78.45693711	79.30705104	79.64459627	79.84462308	80.48220852	80.55721857	80.51971355	80.81975376	80.78224873	80.76974706	81.00727889	81.74487773	81.98240957	82.60749333	82.83252349	82.64499836	82.13242967	81.85739281	81.31982077	81.73237606	81.79488444	82.10742632	82.01991459	81.41983417	81.15729899	80.50721187	80.19466999	80.03214821	80.24467669	80.30718507	80.83225543	80.5947236	79.94463648	79.85712475	79.5820879	79.54458287	79.75711135	79.86962643	79.95713816	79.71960632	78.8694924	78.64446224	78.0068768	77.54431481	77.2942813	77.2442746	77.78184664	77.8568567	78.38192706	78.59445554	78.64446224	78.64446224	79.03201418	79.41956612	79.46957282	80.23217501	81.16980067	81.80738611	82.59499166	82.94503857	83.25758045	83.1825704	83.19507208	83.082557	83.63263071	84.0951927	84.68277144	85.15783511	85.44537364	85.43287197	84.92030328	84.23271113	83.75764747	83.30758715	83.09505867	82.25744642	81.78238276	81.00727889	80.04464988	78.95700413	77.69433492	76.31915063	75.68156518	75.54404675	75.24400654	74.81894958	75.18149817	75.16899649	75.03147806	75.03147806	74.88145796	75.10648812	75.05648141	76.01911042	76.45666905	76.96923774	77.58181984	78.50694381	79.43206779	79.85712475	80.31968674	80.99477721	81.41983417	81.69487103	82.15743302	82.73251009	83.72014244	83.90766757	84.62026307	84.9078016	84.65776809	84.62026307	84.39523291	84.20770778	83.72014244	83.34509218	83.10756035	83.43260391	83.43260391	83.64513239	83.42010223	82.89503187	82.88253019	82.56998831	82.23244307	82.58248998	82.50747993	82.50747993	82.3699615	82.09492464	81.25731239	80.73224203	79.96963983	79.69460297	80.09465659	80.01964653	80.55721857	80.63222863	80.68223533	80.15716496	80.04464988	79.41956612	79.28204769	79.54458287	79.65709795	79.99464318	79.89462978	79.26954601	78.84448905	78.53194717	78.66946559	78.69446894	79.19453596	79.70710465	79.75711135	79.8321214	79.61959292	79.85712475	79.70710465	79.89462978	80.73224203	80.91976716	81.41983417	81.69487103	82.05741962	82.19493805	81.98240957	81.5073459	80.93226883	80.79475041	80.60722528	80.61972695	80.6447303	80.35719177	80.56972025	80.43220182	80.01964653	79.66959962	79.03201418	78.93200078	79.29454936	79.24454266	79.55708454	79.96963983	79.99464318	79.33205439	79.08202088	78.65696392	78.04438183	78.26941198	78.26941198	78.60695722	78.9695058	79.00701083	78.94450245	78.8694924	79.45707114	80.03214821	81.13229564	82.30745312	82.64499836	82.61999501	83.00754695	82.74501176	82.78251679	82.92003522	83.35759386	83.50761396	83.77014914	83.82015584	83.14506537	82.93253689	82.09492464	81.86989449	81.91990119	81.75737941	81.64486433	80.88226213	80.15716496	79.49457617	78.90699743	78.51944549	78.69446894	78.9194991	78.88199408	78.33192036	77.65682989	77.26927795	76.90672937	76.21913722	76.08161879	76.20663555	76.73170591	77.59432151	78.08188685	78.20690361	78.60695722	79.11952591	79.51957952	79.55708454	79.85712475	80.43220182	80.86976046	81.16980067	81.16980067	80.68223533	80.45720517	80.40719847	80.01964653	80.43220182	80.78224873	81.26981407	81.73237606	81.88239616	81.28231575	81.28231575	80.94477051	80.66973365	80.31968674	80.20717166	80.4947102	80.76974706];

% take the absolute value of the fast fourier transform of your row of data
freq=abs(fft(x));


figure
plot(freq)   % plot your data 
axis([2 20 0 500]) % your viewing window of your plot (xmin xmax ymin ymax)
ylabel('Amplitude')
xlabel('Frequency (Hz)')