# Time Series: Examples for Drift, Drift + Trend, Trend

I started using R and applying the vars package in R. According to the documentation, there are the options to select none, constant, trend, or both.

I analyzed my time series and were able to plot the graphs, as shown below. However, some feedback on selecting the appropriate VAR model would be great.

The concept of a "trend" (this post is good) is clear, but visually detecting "constant", also known as "drift", or a time series with "non-zero mean", if I'm correct, seems little unclear.

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• This might be a duplicate of this thread but I cannot mark it as such as the answer in the other thread has no upvotes yet. Also, is the question more about the options of the VAR function in the vars package or about time series terminology ("constant", "drift", "trend", etc) in general? – Richard Hardy Oct 28 '16 at 17:43