What is centered average

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Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions. This chapter from More Predictive Analytics: Microsoft Excel takes a look at how to decompose a time series so that you can see how its seasonality operates apart from its trend if any.

This chapter is from the book. NOTE The averages are easy to calculate whether or not you feel comfortable with array formulas. NOTE The step I just discussed is the source of my misgivings about the entire approach that this section describes. NOTE Keep in mind that if the trend were down rather than up, as in this example, you would add the periodic trend value to the observed periodic means instead of subtracting it.

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I definitely would like to understand everything completely before I go in using short cuts! Don't forget to reduce the len of nums by 2. DaveGalvin I dont think i would need to reduce the length by 2 as I subtracted them out. If i were to reduce the len then i would miss out on 2 other elements. However doing it in one loop is more efficient but I wanted to explain it to OP in separated steps as i find it the best way to learn.

Martijn Martijn 11 1 1 bronze badge. Fabich 2, 3 3 gold badges 26 26 silver badges 35 35 bronze badges. Arpit Patil Arpit Patil 1 1 1 bronze badge. Inka Inka 1. Thaneesh reddy Thaneesh reddy 1 1 1 bronze badge. Somebody Somebody 1 1 gold badge 7 7 silver badges 22 22 bronze badges. Please don't post only code as an answer, but also provide an explanation what your code does and how it solves the problem of the question. Answers with an explanation are usually of higher quality, and are more likely to attract upvotes.

Srinath Srinath 1 1 1 bronze badge. Python 3 Solution using list. Rithvik Mundra Rithvik Mundra 1 2 2 bronze badges. Rob Bricheno 4, 11 11 silver badges 28 28 bronze badges. Aleksi Immonen Aleksi Immonen 1. While this code snippet may solve the question, including an explanation really helps to improve the quality of your post.

Remember that you are answering the question for readers in the future, and those people might not know the reasons for your code suggestion. Please also try not to crowd your code with explanatory comments, this reduces the readability of both the code and the explanations! Sign up or log in Sign up using Google.

Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. What are Moving Average or Smoothing Techniques? When computing a running moving average, placing the average in the middle time period makes sense. In the previous example we computed the average of the first 3 time periods and placed it next to period 3. We could have placed the average in the middle of the time interval of three periods, that is, next to period 2.