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Questions tagged [geom-raster]

52 questions
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1 answer

drawing a box around a raster key

I'm plotting a species prediction map in ggplot using a spatial pixels data frame. I have the plot pretty much how I want it, the only problem is that my raster scale goes from white to red and so it's hard to see where it begins in the legend see…
Jennifer Taylor
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How to use multiple colour scales in ggplot2 in R

Given this matrix where on the x-axis are the latent values (1,2,3,4) and on the y-axis three levels for each drug (RAS, BB and AA). Each box of the matrix contains values between 0 and 1, I would like the boxes colored with an increasing colour…
Nicole
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How to plot spatial data when grid cell size varies

I am trying to make a map of global model predictions with the outline of the world on it. The data I have cover most of the worlds oceans and the grid cells have a resolution of 4 degrees. This is my desired output: Map of global predictions This…
Jam
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Fill Geom_Raster with Multiple Colors

I have a data frame with 3 columns I want to display using geom_raster where the x-axis, y-axis, and fill all contain categorial values. The goal with my original dataset is to show the overlapping data with fills and to show where no data is held…
Patrick
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geom_raster() produces a whitish surface ontop of the map

I am trying to plot a heatmap ontop of a geographical map to show the geographic distribution of a variable. The minimum working code, with absurd data, is the following: library(ggmap) library(osmdata) box <- c(left = 2.075, bottom = 41.325, right…
morphicphicus
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How does geom_raster handle duplicated fill?

I would like to present the probabilities of some joint events as a raster using ggplot2 package and wonder how does geom_raster decides which value to promote in case of more than one cell values. I have cases where these events can have more than…
Liman
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How to combine the fill and alpha aesthetics from two different geoms when using ggplotly

I am trying to add a relief to an interactive choropleth map. I saw that in a non-interactive setting this can be done using the alpha scale of geom_raster and the fill scale of geom_polygon. This works just fine: library(ggplot2) library(plotly) #…
dropout
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producing heat map over Geo locations in R

I want to produce heat map based on some geo-location data on top of the US map using r. The following plot is created over the US map where I used geom_polygon() and geom_point(). How can I convert this to a heat map to get something as follows…
temp
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How to fix ggplot2 geom_text labels for data points overlapping when exporting as .pdf

I'm working with a data set that I want to output in a geom_tile plot, see below: plot114 <- ggplot(data = data1, aes(x = total, y = vrc)) + geom_step(step, aes(x = x, y =…
tonix
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How to use ggplot faceting with data from different dataframes?

I'm trying to use ggplot2 in RStudio to plot nutrient concentrations in a soil profile in function of depth. In addition, I would like to add the proportion of time the soil at that specific depth is unsaturated with a heatmap as background (see…
Niels Van Putte
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Change diagonal within geom_raster() from bottom-left-to-top-right to top-left-to-bottom-right

I have created a heatmap using geom_raster() within ggplot. Currently, the diagonal goes from the bottom left to the top right. I went to flip the diagonal so that it goes from the top left to the bottom right. I've tried to reverse the order x…
CurtLH
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Overlay multiple geom_raster plots with different gradients

I would like to plot with gglot's geom_raster a 2D plot with 2 different gradients, but I do not know if there is a fast and elegant solution for this and I am stuck. The effect that I would like to see is the overlay of multiple geom_raster,…
qubert
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Dual color rectangles from ggplot2 geom_raster()

My question is similar to this link. In this example, 1 is coded for mutation, 0 for wildtype and NA for not available. My dataframe is set up identically, however it may contain two or more types of mutation per gene. I would like to generate a…
bgene
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Plotting Heatmap with geom_raster in ggmap

I have a data frame containing longitude, latitude and a intensity variable (var1.pred). I would like to plot a smooth filled contour plot on a ggmap map. I have done it using a geom_tile plot but it doesn't look smooth. I have decreased the tile…
Robin
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R how to overlay map package and geom_tile?

I'm having trouble overlaying a map (from map package) with raster data (from ggplot2 geom_tile)? library(ggplot2) library(ggmap) library(maps) library(mapdata) Here's my data mydata = read.csv("Seasonal_Temp.csv") head(mydata) >…
James
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