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Questions tagged [tmap]

tmap is an actively maintained open-source R-library for drawing thematic maps, written by Martijn Tennekes. The API is based on the Layered Grammar of Graphics, and resembles the syntax of ggplot2, a popular R-library for drawing charts.

tmap is an actively maintained open-source R-library for drawing thematic maps, written by Martijn Tennekes. The API is based on A Layered Grammar of Graphics by Hadley Wickham and resembles the syntax of , a popular R-library for drawing charts.

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487 questions
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How to convert date column from string to date using with tmap in talend

I am having a date column in string format, but I want to change that string into date format using with tmap in Talend. Now could you please tell me which expression I need to use to change the format from string to date.
Naresh AR
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multiply by integer using tMap

I want to calculate a percentage but when I multiply by 100 I get an error : bigdecimal is not defined for the type Im
pika
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Special Character filtering with null in talend

I have an excel which has few fields. I want to extract only those fields which has a special character ? in the values. I tried with the contains method in tmap without putting in condition for null but I am getting this NullPointer Exception as…
user1538020
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How do you add a raster layer ontop of another raster map in R

I've created a base map as seen in the document provided. In addition to this I've also made a combined raster file with Fs values that I wish to overlay over the basemap. I was wondering how I can overlay one on top of the other. Both have the same…
Matlaboverflow
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tmap crashes R on loading

I used tmap and it was working fine until two days ago. I opened a project where tmap was used and worked perfectly, and tmap crashed R on loading (library(tmap)). I use windows 11 and R studio. I tried R versions 4.1.3 and 4.2.0patched, without…
Zest
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How to optimize this R script to use the minimum CPU and Memory possible

I built this R script that generate a map and a background tiles, the problem is, I need to run it on PowerBI service, which has a very constrained resources (Ram and CPU), I attached a reproducible example This example works fine in PowerBI…
Mim
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Converting latitude and longitude to coordindates

I manually entered latitude and longitude in my dataset in csv format and imported the dataset to R. I am trying convert the variable lat and lng into coordinates so that I can use tmap or geom_sf to plot it as a map in R. But I am not able to do…
Mahir Bhatt
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