Questions tagged [ggplot2]
Use this tag when referring to the R package for high level data visualization and mapping.
149
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94
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Making map with marginal graphics like rasterVis::levelplot(margin=T)
I love rasterVis::levelplot(margin=T) because its marginal graphics show the column (x)
and row (y) summaries of the Raster object. I think it is very helpful to visualize the raster.
Package ...
- 161
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0
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256
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Why is coord_sf needed to plot a geom_raster with ggplot2?
Why is coord_sf() needed to plot a geom_raster in ggplot2 and what exactly does coord_sf() do?
According to ggplot2's Map project's documentation: coord_map projects a portion of spherical earth onto ...
- 750
1
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1
answer
92
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Kernel density plot in R, plot discreet values on map for specific grid cells
I am trying to highlight single 1x1 degree grid squares on a map.
It works highlighting individual grid squares for the first 1 squares but after highlight the 4th square it begins to highlight ...
- 23
1
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1
answer
36
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Overlay colors onto specific 1 degree x 1 degree grid squares in R
I am trying to color in specific grid cells within a map to highlight sampling effort.
I can generate the map but then I am unsure how to use utilize the data points I have to color in the entire grid ...
- 23
1
vote
1
answer
84
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Working and saving histogram of data
I'm new to R and struggling to create a histogram and add a mean line. I've tried both hist() and doing it through ggplot, but keep seeing errors.
I'm using the newest version of R studio on a windows ...
- 11
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2
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152
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SF Collection Plots in lat/long but Geometry is Not
I'm using urbnmapr to get a county base map. I want to plot my own points on top of this map. Even though the urbnmapr map plots with lat/long on the x y axis, the lat/long points that I want to plot ...
0
votes
1
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64
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How to set number of columns with stack or brick or spatraster in rasterVis::levelplot?
If I have a spatraster with 6 layers, rasterVis::levelplot will give a 2 rows and 3 columns plot.
How can I change it to 3 rows and 2columns?
library(rasterVis)
library(terra)
f <- system.file(&...
- 161
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56
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How to join the values shown in the ggplot legend as an added column to the spatial data frame/shapefile?
I have a dataset filled with points. The image assigns the points a value based on clusters. Is there a way to assign those values shown in the image onto the dataset itself as a new column? This ...
- 193
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0
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171
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Recenter map that crosses international dateline with ggplot and geom_sf
Consider the map of Europe below. Parts of Russia are on the other side of the map. How might I "recenter" the map so that there is less empty space? I guess I need to somehow move the ...
- 101
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1
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136
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Exporting raster of a map to QGIS from GGplot in R
I used R to make density surface models of whales in GGPLOT. However, l can not work out how to get the model into a raster so i can use it in QGIS. I have been trying as below but the squares of the ...
0
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1
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174
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Coloring polygons (made with concaveman) in ggplot by column
I'm adapting code for a map made by someone else that uses a package concaveman to generate concave hulls from points. The goal is to plot a number of different polygons in the oceans, and to color-...
- 145
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172
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How to color lakes and districts in GADM maps?
This might be a trivial question for regular users but I still couldn't find a quick and easy answer. I'm trying to create a map of Uganda in R using data retrieved using the getData("GADM", ...
0
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1
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393
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Problem with multiple raster plot
This is my code to try plotting three different rasters with ggplot2. However, when I run the code just one raster is displayed.
What could the problem be?
library(ggplot2)
library(dplyr)
library(...
0
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1
answer
519
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Only a part of the shapefile plotted with ggplot2 in R
I would like to plot shapefiles from the EUFORGEN website (http://www.euforgen.org/) in R (European beech and Scots pine). At first I had problems, because they are files with holes. I was able to ...
- 11
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368
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How to add polygon in ggplot2 with raster? Polygon is missing from final plot after ggplot
I have a stack of raster's and suppose to find the mean of it. I have done it. Now, I want to add polygon on the mean of raster image that I got. Then, from this raster I wants to save and make it ...
- 348
1
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1
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279
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Reprojected data from stars R package takes forever with geom_stars and ggplot2
I'm finding very different plotting results with stars objects after I reproject them and use ggplot2. Consider the following:
library(stars)
library(ggplot2)
system.file("tif/L7_ETMs.tif", ...
- 453
1
vote
1
answer
697
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Plotting a heatmap of Kriging with coordinate in R
I performed Kriging in R. But I have trouble getting a plot of a colored heatmap showing the resulted interpolated area along with a lon/lat values at the side and on the button.
Here is an example, ...
- 117
1
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1
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553
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Limit the x-axis values of a barplot in r
I have a raster that includes the 120 million pixel values 0,1,10,11.
I generate a percentage raster. But I want the x-axis to show only the pixel values.
a = as.data.frame(diff_raster[[5]])
ggplot(a,...
- 139
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0
answers
112
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Loop over dataframes and extract specific values to generate multiple rasters/plots
I would seek help to revise this script.
I need to generate multiple plots.
For example, the following code works well ggplot and gsave but I would prefer to use raster, and I tried something such as ...
- 39
2
votes
1
answer
1k
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sf package point in polygon
I'm trying to create a simple polygon in sf and select only points within that polygon. What am I doing wrong here?
library(sf)
library(concaveman)
library(ggplot2)
foo.df <- data.frame("long&...
- 125
5
votes
1
answer
2k
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Plot two layers (raster and polygon-vector) with ggplot and use the fill-scale* for both layers
I am a little lost. I have a stars object where I would like to use the first attribute and map it to the
scale_fill*-function in ggplot.
I also have an polygon-object of class sf that has an ...
- 911
0
votes
1
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109
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Eurostat shapefiles plotting with errors
I am trying to plot interactive maps at the NUTS3 level. Initially I was using shapefiles that I constructed myself for the data in QGIS, however, when I tried to use them in R they rendered poorly ...
2
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1
answer
1k
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Simplify raster size to plot using ggplot geom_raster()
I want to create a map using 'ggplot2'. My data contains shapefile (points data), polygons (European countries). Underneath the vector data, I wanted to place the raster showing extends of forests ...
- 3,326
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votes
1
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514
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geom_raster showing inverted colors
I am trying to plot a simple single band raster in R using ggplot. The only problem with my plot is that the colors are inverted. How can I fix that?
### For plotting I am using ggplot2 and ggpspatial ...
- 882
2
votes
1
answer
3k
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Why won't ggplot fill heat map using geom_tile in R?
I am trying to emulate some geom_tile plots I saw in a research paper. The plots were created with simulated data. Below I created a dataframe of "dummy data" using a subset of the actual ...
6
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1
answer
3k
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Plotting multiple raster stacks with rasterVis::gplot and ggplot2::facet_wrap
I'm trying to ggplot2::facet_wrap a stack of rasters, and then call geom_raster to add more rasters on top of the previously mapped raster stack.
Here is a very simple example dataset to re-create ...
- 1,360
1
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1
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84
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Why does not the coordinate of the graph match the dataframe?
I drawing the plot of Île-de-France with
library(sf)
library(ggplot2)
df <- read.csv("https://raw.githubusercontent.com/leanhdung1994/Stat_Cons/main/station.csv")[1:3]
df2 <- st_as_sf(...
- 113
7
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1
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9k
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Plotting a raster stack with ggplot2
My aim is to plot a rasterstack as a single image using ggplot2. First, I apply ggplot on a single layer raster using the following code:
#Load packages
library(raster)
library(ggplot2)
#Create a ...
- 197
2
votes
1
answer
230
views
Spatial neighbors in ggplot2
I'm trying to make a space plot with ggplot() as indicated here, but I'm having trouble using the nb2lines() function.
.shp files are here
Error in if (!is.na(projargs) && !nzchar(projargs)) ...
- 123
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1
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755
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How to perform point to raster operation and plot it with raster of different spatial resolution in R?
I posted a question (please find the link below) regarding raster plots at stackoverflow but could not get the solution. Does anyone here has the solution?
https://stackoverflow.com/questions/63209707/...
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0
answers
287
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Plotting arrows in a map to show shifts in coordinates or points using ggplot2
Plotting arrows in a map to show shifts in coordinates or points using ggplot2
I have three points in my map (latitudes and longitudes of the points: a, b and c are provided below). I would like to ...
- 11
1
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1
answer
661
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Stat_density_2d density plot seem to show too high density values for a small dataset
I'm working with a two-column data.frame with the columns containing x and y coordinates (Longitude, Latitude).
A simple way to visualize a density map is by using the 'stat_density_2d' function. When ...
- 75
1
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1
answer
2k
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Wrong scale in ggplot2 map
I am trying to create a political map of Morocco with regions, using ggplot2, but the scale seems to be wrong. This is the map:
And below is the code I used:
library(ggplot2)
library(ggspatial)
YK = ...
- 111
3
votes
1
answer
3k
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Axis labels with geom_sf & ggmap
I'm trying to create a map using a basemap pulled in using ggmap (get_stamenmap) with some shapefiles plopped on top (geom_sf). I want to change axis labels! Why's it so difficult!
When I only plot ...
- 39
0
votes
1
answer
201
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plot_usmap Incorrect Legend Values
I am trying to use plot_usmap to map a data frame with two columns - fips and change2 - where the values for change2 range from -34.7 to 91.5. When I run this code:
plot_usmap(regions = "counties", ...
0
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2
answers
408
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Computing Moran's I from a ggplot map using R
In an effort to detect spatial autocorrelation using Moran's I in some variables, I was wondering how I could go about creating a polygonal shapefile from a ggplot-created map. My data lists multiple ...
- 53
1
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1
answer
1k
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Adding elevation point data and lines to topography plot using ggplot2
I have pieced together some code to make a topography plot using elevation data and ggplot2.
However, now I would like to overlay onto this plot the country outlines, along with points to show the ...
- 13
1
vote
1
answer
829
views
geom_rect rectangle disappears when used together with coord_sf in R
I am plotting a map with ggplot2 and would like to have a rectangle surrounding it. I have tried to create the rectangle using geom_rect function, but whenever I include coord_sf function in the code ...
- 65
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1
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722
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Base-R legend for quick plot of sf-objects
I have two sf-objects that are polygons and one that is a layer of points. The attributes (columns) don't really matter for quick visualization purposes. I just want to make a basic legend and give ...
- 615
3
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306
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What is tilde (~) for in R? [closed]
I know this is an almost too simple question. But maybe there is a fast answer. Looking through some code to build a leaflet map in R I found that part of code:
mypal = colorNumeric(
palette = "...
- 615
3
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0
answers
135
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Remediating path that crosses international dateline
I'm trying to plot the paths of multiple ships on a world map using R and a series of Lat/Lon points.
All is well until the ship crosses the international dateline (-180/180) when the path jumps ...
- 153
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1
answer
995
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ggplot2lend for sf-objects
I wanted to make a simple plot of four sf-objects which don't contain much more than the sfc-column and some postal-code information.
The sf-objects have the names level 1-4 and plz. What I would ...
- 911
1
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1
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952
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geom_vline and scale_x_discrete dont fit with each other
I am a newbie here.
1, The aim is to plot a graph about the mean NDVI value during a time period (8 dates were chosen from 2019-05 to 2019-10) of my study site (named RB1). And plot vertical lines to ...
- 11
1
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0
answers
209
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ggplot with island ("Alaska problem")
The data for this example can be found here:
https://github.com/davidbaniadam/maps
The problem is essentially the same with Alaska and mainland USA, i.e. I want the size of Alaska to be correct in ...
- 323
2
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514
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Union anti-meridian "multipolygons" after re-centering world map
My goal is to create a world map (using ggplot2) with a Pacific perspective.
I have managed to re-center the map, by following this solution. Code below:
# world country layer
sppolys <-...
- 53
-1
votes
1
answer
4k
views
Reorder legend in ggplot object [closed]
I met some trouble when dealing with the order of ggplot legend.
I plotted three lines in one graph, and I tried to use 'scale_colour_mannual' to change the order as the line from top to bottom, but ...
- 95
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votes
0
answers
65
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Polygon boundary is not properly connected in R
I have two points sets, when plotted using geom_point, they look like:
What I want to do is draw a polygon using these two datasets, and I expect to get a ring-shape polygon. However, when I use ...
- 29
2
votes
0
answers
275
views
Assign different colours to intersection between two polygons and difference area
I am quite new to GIS using R.
I have two sets of data, upon which I could create two polygons like this:
What I want to do is colour the common area (inner 'circle') and the space between borders. ...
- 29
1
vote
1
answer
84
views
Splitting an administrative region into given number of parts
I have the following plot.
I want to divide the administrative region into given number (say 20) equal parts.
library(maps)
data(world.cities)
Pakistan <- data.frame(map("world", "Pakistan", ...
- 293
1
vote
1
answer
341
views
Order features in a spatialpolygonsdataframe in ggplot2
I have a spatialpolygonsdataframe with many overlapping features. I want to create a map in which the smaller features are displayed on top of the larger ones so that the small ones aren't fully ...
- 105