delete a row and column from matrix by name in r

To delete a row or column from a matrix based on the row or column name in R, you can use the following approach:

Delete a row based on row name:


# Create a sample matrix
mat <- matrix(1:9, nrow = 3, dimnames = list(c("A", "B", "C"), c("X", "Y", "Z")))
mat
# Delete row "B"
mat <- mat[-which(rownames(mat) == "B"), ]
mat
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Delete a column based on column name:


# Create a sample matrix
mat <- matrix(1:9, nrow = 3, dimnames = list(c("A", "B", "C"), c("X", "Y", "Z")))
mat
# Delete column "Y"
mat <- mat[, -which(colnames(mat) == "Y")]
mat
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7 lines

In the above code snippets, we are deleting a row with the name "B" and a column with the name "Y" from the sample matrix mat.

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