Category Archives: Data manipulation

How many is fifty? Sanity checks for assemblage data.

This week I’m at the Palaeolimnology Symposium in Stockholm this week. I have a couple of presentations. I gave the first this morning to the chironomid “DeadHead” meeting. I showed some sanity checks for assemblage data, some of which are … Continue reading

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Statigraphic diagrams with ggplot

rioja::strat.plot is a great tool for plotting stratigraphic plots in R, but sometimes it is not obvious how to do something I want, perhaps a summary panel showing the percent trees/shrubs/herbs. Of course, I could extend strat.plot, but I do … Continue reading

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How to calculate percent from counts in R

Micropaleontologists and others often want to calculate percent from count data. From looking at archived data, I realise that what should be an easy process goes wrong far more often that it should (which is of course never). Yesterday, I … Continue reading

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All the pollen

“And some things that should not have been forgotten were lost. History became legend. Legend became myth. And for two and a half thousand years, the metadata passed out of all knowledge.” A couple of months ago, Eric Grimm gave … Continue reading

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