Fs = 10.0;
windowName = 'Hamming';
segmentLength = 1024;
overlapPercent = 50;
%calculate the PSD
tensWSHsTest = spectrum.welch(windowName, segmentLength, overlapPercent);
tensionWSPSDDT = psd(tensWSHsTest, detrend(tensionWS), 'Fs', Fs);
tensionWSPSDNDT = psd(tensWSHsTest, tensionWS, 'Fs', Fs);

window = 1024;
overlap = [];
[tensionWSPWelchDT,freqTensionWSPWelchDT] = pwelch(detrend(tensionNS),window,overlap,[],Fs);
[tensionWSPWelchNDT,freqTensionWSPWelchNDT] = pwelch(tensionNS,window,overlap,[],Fs);

plot(tensionWSPSDtDT)
title 'PSD Detrend'
plot(tensionWSPSDTestNDT)
title 'PSD No Detrend'
plot(tensionWSPWelchTestDT)
title 'PSD Detrend'
plot(tensionWSPSDTestDT)
title 'PSD Detrend'