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Slice into Zarr Arrays in R • pizzarr
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Pizzarr is an R implementation for Zarr.
Getting Started
The pizzarr package includes:
- Support for reading and writing Zarr Arrays and Groups
- Support for numeric, logical, and string Zarr data types
- Support for both R-like one-based slicing and Python-like zero-based slicing
- Familiar API based on zarr-python and zarr.js
- R-based and R6-based implementation for ease of maintenance
Installation
Installation requires R 4.0.0 or greater.
install.packages("devtools")
devtools::install_github("keller-mark/pizzarr")Examples
library(pizzarr)
a <- array(data=1:20, dim=c(2, 10))
# [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
# [1,] 1 3 5 7 9 11 13 15 17 19
# [2,] 2 4 6 8 10 12 14 16 18 20
z <- zarr_create(shape=dim(a), dtype="<f4", fill_value=NA)
z$set_item("...", a)
selection <- z$get_item(list(slice(1, 2), slice(1, 5)))
print(selection$data)
# [,1] [,2] [,3] [,4] [,5]
# [1,] 1 3 5 7 9
# [2,] 2 4 6 8 10