I am working on developing drive cycles of a particular city. I have collected raw driving data and processed the data to design a representative drive cycle. I would like to have a comparative study with my developed cycle and other already developed or in use cycles. By literature review, I have understood that Speed Acceleration Frequency Distribution (SAFD) or Speed Acceleration Probability Distribution (SAPD) plots are a widely used way of visualizing the cycles. I am not quite sure how to develop that. I can develop a 2d histogram of the data which works for visual inspection to some extent, but I am unable to calculate a numeric value of SAFD or SAPD which can give me stats like relative error. Need help.
Note that speed and acceleration have different units so it's hard to put them on one graph. Perhaps that's why it hasn't been done yet. Good luck with your research, David Booth
David Eugene Booth thank you for replying. Speed and acceleration do have different units, but frequency distribution of those entities can be equally spaced and are unit less. So it is doable, researchers has done it, my problem is, I can not figure out how it is being done or how can it be narrowed down to a numeric value which can be used for purposes like comparing various drive cycles. I am attaching a sample plot, plots of the same type are frequently used in this line of research.
Try ggplot2 in R under these conditions. Google it. There are many references good luck, David Booth
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