Questions about the stars R package for spatiotemporal arrays.
stars is an R package for spatiotemporal arrays and raster and vector "data cubes".
Questions tagged [r-stars]
58 questions
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1 answer
Apply function at grid cell level across layers of a raster file
I have a netcdf raster object with multiple layers (time: 30 years * 12 month = 360 steps).
The raster is constituted of multiple grid-cells (say 1000). I want to linearly detrend each month separately and each grid cell separately to obtain a…
Raed Hamed
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1 answer
r stars raster cannot be plotted: Error in attributes(.Data) <- c(attributes(.Data), attrib)
I have 6 large rasters of a soil property and I wish to plot them using facet_wrap. Each of these raster represent a different depth interval for the same area and the same property. I usually load my raster from my hard drive but this time I load…
Alexandre Wadoux
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reading NetCDF files - tibble columns must have compatible sizes
I like to read NetCDF files via stars::read_ncdf or tidync::tidync but get an error message like
#> Error:
#> ! Tibble columns must have compatible sizes.
#> • Size 2: Columns `filter_id` and `filter_params`.
#> • Size 3: Column `chunksizes`.
#> ℹ…
ckluss
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Calculate number of NA and non-NA values in a raster but with new resolution and extent
I need to calculate the number of NA and non-NA values in a raster with original resolution of 1 x 0.00811 but aggregated to 2 degrees and with a new extent.
The original raster (available here:…
Tania Barychka
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- 1
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Edge detection on stars raster in R with cropped raster
I have a stars raster object called raster. I am trying to run edge detection on it like:
image(rot90c(edge.detect(raster[[1]], thresh1=1, thresh2=80, noise="gaussian", noise.s=3, method="Canny")))
This works fine, but when I try to crop the…
coder11
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Manipulating stars objects
My question is about tranforming "stars" class objects.
As a result of a spacetime kriging, I have a stars object like the following:
stars object with 2 dimensions and 1 attribute
attribute(s):
Min. 1st Qu. Median Mean 3rd…
Roberto Olmi
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Is it possible to create a stars object in R that is the minimum values of two other stars objects?
I have two stars objects that are read in to R as tifs:
tif1 <- stars::read_stars("/data.tif")
tif2 <- stars::read_stars("/data2.tif")
They cover the same extent and have the same resolution. I know that I can do algebra with the objects -- for…
Ben Lee
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2 answers
hover over each stars and then finally click on 4th star
On a webpage I have a rating stars feedback ,When I hover on the stars they became yellow .I have 5/6 similar divs, same Class and configuration.If I hoover and click on the 4th stars, they all became yellow .What I would like to do is target the…
user3227620
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Products of all pairwise combinations of bands in two rasters with R stars package
I have two multiband rasters of class stars. They have the same resolution and extent in their first two dimensions (x and y). Each raster has multiple bands. I would like to take all pairwise combinations of bands from each of the rasters and find…
qdread
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Create a single raster file from a raster file with multiple layers and average the pixel values
I have to convert a raster file of class "stars" that contains 30 layers (30 values at each pixel) (466 x 435 x 30), to a new raster file of the same type (stars) with a single layer (466 x 435 x 1). For each pixel, its value should equal the…
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1 answer
How to identify the polygons in which raster values were extracted with the stars R package?
Following-up a previous question (on stackoverflow), I am trying to understand how subsetting using polygons works with the stars R package. The following code opens a raster file and crops it to a smaller dimension.
library(stars)
#> Loading…
Philippe Massicotte
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1 answer
Normalizing an R stars object by grid area?
first post :)
I've been transitioning my R code from sp() to sf()/stars(), and one thing I'm still trying to grasp is accounting for the area in my grids.
Here's an example code to explain what I mean.
library(stars)
library(tidyverse)
# Reading in…
JJK
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Remove emtpy raster - stars package R
I have loaded a raster using stars package and then created tiles over the raster. Now i subset the raster based on these tile.
tiles[[i]] <- st_bbox(c(xmin=x0,ymin=y0,xmax=x1,ymax=y1),crs=st_crs(r))
crop_tiles[[i]] <- r[tiles[[i]]]
Here r is…
rw_11
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