Brick_matrix_exists: Check if a chromosome pair exists.

In HiCBricks: Framework for Storing and Accessing Hi-C Data Through HDF Files

Description

Matrices are created when the bintable is loaded and the chromosome names are provided. If a user is in doubt regarding whether a matrix is present or not it is useful to check this function. If the Bintable did not contain a particular chromosome, any matrices for that chromosome would not be present in the file

Usage

Brick_matrix_exists(Brick, chr1, chr2, resolution = NA)

Arguments

Brick	Required. A string specifying the path to the Brick store created with Create_many_Brick.
chr1	Required. A character vector of length 1 specifying the chromosome corresponding to the rows of the matrix
chr2	Required. A character vector of length 1 specifying the chromosome corresponding to the columns of the matrix
resolution	Optional. Default NA When an object of class BrickContainer is provided, resolution defines the resolution on which the function is executed

Value

Returns a logical vector of length 1, specifying if the matrix exists or not.

Examples

Bintable.path <- system.file(file.path("extdata", "Bintable_100kb.bins"), 
package = "HiCBricks")

out_dir <- file.path(tempdir(), "matrix_exists_test")
dir.create(out_dir)

My_BrickContainer <- Create_many_Bricks(BinTable = Bintable.path, 
    bin_delim = " ", output_directory = out_dir, file_prefix = "Test",
    experiment_name = "Vignette Test", resolution = 100000,
    remove_existing = TRUE)

Matrix_file <- system.file(file.path("extdata", 
"Sexton2012_yaffetanay_CisTrans_100000_corrected_chr2L.txt.gz"), 
package = "HiCBricks")

Brick_load_matrix(Brick = My_BrickContainer, chr1 = "chr2L", 
chr2 = "chr2L", matrix_file = Matrix_file, delim = " ", 
remove_prior = TRUE, resolution = 100000)

Brick_matrix_exists(Brick = My_BrickContainer, chr1 = "chr2L", 
chr2 = "chr2L", resolution = 100000)

HiCBricks documentation built on Nov. 8, 2020, 7:45 p.m.