colAlls,xgCMatrix-method {sparseMatrixStats} | R Documentation

## Check if all elements in a row (column) of a matrix-like object are equal to a value

### Description

Check if all elements in a row (column) of a matrix-like object are equal to a value.

### Usage

    ## S4 method for signature 'xgCMatrix'
    colAlls(x, rows = NULL, cols = NULL, value = TRUE, na.rm = FALSE)

    ## S4 method for signature 'xgCMatrix'
    rowAlls(x, rows = NULL, cols = NULL, value = TRUE, na.rm = FALSE)

### Arguments

`x` | An NxK matrix-like object.
`rows` | A `vector` indicating the subset of rows (and/or columns) to operate over. If `NULL`, no subsetting is done.
`cols` | A `vector` indicating the subset of rows (and/or columns) to operate over. If `NULL`, no subsetting is done.
`value` | The value to search for.
`na.rm` | If `TRUE`, `NA`s are excluded first, otherwise not.

### Details

The S4 methods for `x` of type `matrix`, `array`, or `numeric` call `matrixStats::rowAlls` / `matrixStats::colAlls`.

### Value

Returns a `logical` `vector` of length N (K).

### See Also

- `matrixStats::rowAlls()` and `matrixStats::colAlls()` which are used when the input is a `matrix` or `numeric` vector.

- For checks if any element is equal to a value, see `rowAnys()`.

- `base::all()`.

### Examples

    mat <- matrix(rnorm(15), nrow = 5, ncol = 3)
      mat[2, 1] <- NA
      mat[3, 3] <- Inf
      mat[4, 1] <- 0

      print(mat)

      rowAlls(mat)
      colAlls(mat)

[Package sparseMatrixStats version 1.2.1 Index]