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Geographic Information Systems

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  • Care to explain the key.entries portion of that code? Commented Dec 15, 2015 at 21:24
  • @Lauren, I avoid lattice at all cost (which includes spplot and bubble). As such, I expanded my answer to accomplish this in base plot. Commented Dec 15, 2015 at 22:57
  • I'm having a hard time working my way through the first bit of code, but I'm certainly more familiar with the second option you suggested (reclassing the vector sizes/colors). Is there a way to use this same type of code structure but with real numbers? So instead of branches$share == .03, x, I would need to use branches$share <= 0.3, x. Unfortunately, this type of structure gives me an error saying that <= is not useful for factors. My data is listed as factors, but they should be considered real numbers. It appears that as.real is now defunct. Commented Dec 16, 2015 at 17:54
  • If R is automatically coercing a column to a factor it is because of something contained in the data (eg., special character, quoted text). If the data is quoted and coercion is not because there is a special character in the column you can just defactorize the data using: df$x <- as.numeric(as.character(df$x)) Commented Dec 16, 2015 at 18:33
  • @Lauren, the mapview looks like it may be a more tractable route cartographically but, please work through the code I provided as it is what we commonly refer to as a "teachable moment" and will help bolster your understanding of R in general. Commented Dec 16, 2015 at 20:57