16, each=4),]
rownames(chao) &lt;- 122:125
chao$eon &lt;- rep("Chaotian", 4)
chao$era &lt;- c(rep("Neochaotian", 2), rep("Eochaotian", 2))
chao$period &lt;- c("Titanomachean", "Hyperitian", "Erebrean", "Nephelean")
chao$MA &lt;- c(4500, 4560, 4567, 4730)
usethis::use_data(geostellar)</p>

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