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Convert Various Numeric Types to Matrix Market Format

Source: R/fastMatMR-package.R
write_fmm.Rd

This function takes different types of numeric inputs—vectors, matrices, and sparse matrices— and converts them into Matrix Market files. The output file is written to disk.

Usage

write_fmm(input, filename = "out.mtx")

Arguments

input

A numeric object to be converted. This can be a numeric vector, a matrix, or a sparse matrix.

filename

The name of the output file where the Matrix Market formatted data will be saved. It is recommended to use a filename ending with ".mtx" for clarity.

Value

A boolean indicating success or failure. Writes a MTX file to disk.

Examples

vec <- c(1, 2, 3)
mat <- matrix(c(1, 2, 3, 4), nrow = 2)
sparse_mat_diag <- Matrix::Matrix(c(1, 0, 0, 2), nrow = 2, sparse = TRUE)
## Diagonal ^-
sparse_mat <- Matrix::Matrix(c(1, 1, 0, 2), nrow = 2, sparse = TRUE)
## And not diagonal -^
write_fmm(vec, tempfile(fileext = ".mtx"))
#> [1] TRUE
write_fmm(mat, tempfile(fileext = ".mtx"))
#> [1] TRUE
write_fmm(sparse_mat_diag, tempfile(fileext = ".mtx"))
#> [1] TRUE
write_fmm(sparse_mat, tempfile(fileext = ".mtx"))
#> [1] TRUE