https://communities.sas.com/t5/SAS-Programming/Bring-a-difference-between-two-time-series-based-on-class-to/m-p/933066#M367003 You gotta need Wavelet Analysis:<BR /><A href="https://communities.sas.com/t5/SAS-Communities-Library/Introduction-to-Wavelet-Analysis-using-SAS-IML-Time-Frequency/ta-p/919566" target="_blank">https://communities.sas.com/t5/SAS-Communities-Library/Introduction-to-Wavelet-Analysis-using-SAS-IML-Time-Frequency/ta-p/919566</A><BR /><BR /><A href="https://communities.sas.com/t5/SAS-Communities-Library/Wavelet-Analysis-using-SAS-IML-Thresholding-the-Detail/ta-p/925884" target="_blank">https://communities.sas.com/t5/SAS-Communities-Library/Wavelet-Analysis-using-SAS-IML-Thresholding-the-Detail/ta-p/925884</A> Thu, 20 Jun 2024 01:32:41 GMT Ksharp 2024-06-20T01:32:41Z https://communities.sas.com/t5/SAS-Programming/Bring-a-difference-between-two-time-series-based-on-class-to/m-p/932968#M366982 <P>Hello Community,</P> <P>&nbsp;</P> <P>I am struggling with a time series study.</P> <P>&nbsp;</P> <P>My goal is to find a constant or coefficient to add it to my equation to bring the differences between these two series to zero. </P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="harmonic_0-1718794484215.png" style="width: 825px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/97622iFF12BC5ED7B7281E/image-dimensions/825x420?v=v2" width="825" height="420" role="button" title="harmonic_0-1718794484215.png" alt="harmonic_0-1718794484215.png" /></span></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="harmonic_1-1718794544831.png" style="width: 832px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/97623iDD61803C409DCE8B/image-dimensions/832x436?v=v2" width="832" height="436" role="button" title="harmonic_1-1718794544831.png" alt="harmonic_1-1718794544831.png" /></span></P> <P><BR />My approach is clustering these class to reduce the complexity of my problem because I would like to find common coefficients and use them for clusters of class.&nbsp;</P> <P>However, looking at my series, it seems that there is a seasonal factor that helps me, although not in all my classes. <BR /><BR />What could be the correct approach to find this factor or coefficient that brings this difference to zero.<BR /><BR />Thank you <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> Wed, 19 Jun 2024 10:58:06 GMT https://communities.sas.com/t5/SAS-Programming/Bring-a-difference-between-two-time-series-based-on-class-to/m-p/932968#M366982 harmonic 2024-06-19T10:58:06Z https://communities.sas.com/t5/SAS-Programming/Bring-a-difference-between-two-time-series-based-on-class-to/m-p/933066#M367003 You gotta need Wavelet Analysis:<BR /><A href="https://communities.sas.com/t5/SAS-Communities-Library/Introduction-to-Wavelet-Analysis-using-SAS-IML-Time-Frequency/ta-p/919566" target="_blank">https://communities.sas.com/t5/SAS-Communities-Library/Introduction-to-Wavelet-Analysis-using-SAS-IML-Time-Frequency/ta-p/919566</A><BR /><BR /><A href="https://communities.sas.com/t5/SAS-Communities-Library/Wavelet-Analysis-using-SAS-IML-Thresholding-the-Detail/ta-p/925884" target="_blank">https://communities.sas.com/t5/SAS-Communities-Library/Wavelet-Analysis-using-SAS-IML-Thresholding-the-Detail/ta-p/925884</A> Thu, 20 Jun 2024 01:32:41 GMT https://communities.sas.com/t5/SAS-Programming/Bring-a-difference-between-two-time-series-based-on-class-to/m-p/933066#M367003 Ksharp 2024-06-20T01:32:41Z