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Boutros on 07 January 2016
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Shadow1980 said:
Boutros said:

I think one graph that would be interesting is aligned launch cumulative sales of 7th and 8th gen consoles to see how the PS4 is performing in comparison to the PS3 and the Wii U at the same point in time.

I never did cumulative weekly data, but I have catalogued weekly data from everything. It would take forever to add hundreds of weeks worth of data, so I'll just compare raw weekly data. I decided to just align them as closely as possible while keeping the years even, so since the PS4 launched in Media Create Week 8 of 2014, I aligned that week with the PS3's Week 8 of 2007 instead aligning them by first full year, that way their first full fourth quarters are aligned.

Those are great thanks!

As for cumulative if you're using Excel wouldn't this work?:

https://www.youtube.com/watch?v=-muM3klpNFE

I'm not sure what kind of data you have so maybe it wouldn't be so simple for you but the formula above is pretty fast to do.