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How to test if two time series are the same?
I have two time-series from two different years and would like to statistically test whether they are different in values despite showing the same/similar trends. I’m really new to time-series analysis (and R), so please bear with me.
What are the characteristics of a time series?
Some features of the plot: There is no consistent trend (upward or downward) over the entire time span. The series appears to slowly wander up and down. The horizontal line drawn at quakes = 20.2 indicates the mean of the series.
How to create features from time series data?
In this tutorial, we will look at three classes of features that we can create from our time series dataset: Date Time Features: these are components of the time step itself for each observation. Lag Features: these are values at prior time steps. Window Features: these are a summary of values over a fixed window of prior time steps.
Are there any time series models that work?
Existing time series forecasting models undoubtedly work well in most cases, but they do have certain limitations. I’ve seen aspiring data scientists struggle to map their data when they’re given only the time component and the target variable. It’s a tricky challenge but not an impossible one. There’s no one-size-fits-all approach here.
Is there a good correlation between two series?
If the r is small your conclusion would be that they are weakly related and so no desirable comparisons and a larger value if r would suggest good comparisons s between the two series. The third step where there is good correlation is to test the statistical significance of the r.
Which is the best model to describe each series separately?
With that in place I would identify a common model that would reasonably describe each series separately. This might be an ARIMA model or a multiply-trended Regression Model with possible Level Shifts or a composite model integrating both memory (ARIMA) and dummy variables.
How to make a comparing and contrasting chart?
To make a chart, figure out what criteria you want to focus on in comparing the items. Along the left side of the page, list each of the criteria. Across the top, list the names of the items. You should then have a box per item for each criterion; you can fill the boxes in and then survey what you’ve discovered.