Highlight an area using symbol
On Mon, 18 Nov 2019, Raman Mishra wrote:
Raman Mishra Senior Research Scholar International Institute for Population Sciences, Mumbai Mobile: +91-8879317106 ---------- Forwarded message --------- From: Raman Mishra <raman.mishra10 at gmail.com> Date: Mon, Nov 18, 2019 at 12:19 PM Subject: Highlight an area using symbol To: <r-sig-geo at r-project.org> My data have a missing value for a district, I gave 0 value for the district and did spatial analysis (Univariate, Regression etc.). I tried using "NA" instead of 0 value for that district but most of the codes available online are not working with "NA" and it won't be ethical to delete that area from my map. I want to highlight that district using symbols. Is it possible that after the creation of maps one can highlight that district using some function? Please provide a solution as I am new to R.
library(sf)
nc <- st_read(system.file("shape/nc.shp", package="sf"))
library(tmap)
tm_shape(nc) + tm_fill("SID74")
set.seed(1)
is.na(nc$SID74) <- sample(1:nrow(nc), 5)
tm_shape(nc) + tm_fill("SID74")
tm_fill() denotes NA values automatically, and provides the easiest
solution. You could also add a symbol, but I don't think this is
necessary. tmap handles the older sp objects too, but new vector data work
should use sf, not sp.
Hope this helps,
Roger
Thanks Raman Mishra Senior Research Scholar International Institute for Population Sciences, Mumbai Mobile: +91-8879317106 [[alternative HTML version deleted]]
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