This class represents the sum of all entries in a vector or matrix.

```
SumEntries(expr, axis = NA_real_, keepdims = FALSE)
# S4 method for SumEntries
to_numeric(object, values)
# S4 method for SumEntries
is_atom_log_log_convex(object)
# S4 method for SumEntries
is_atom_log_log_concave(object)
# S4 method for SumEntries
graph_implementation(object, arg_objs, dim, data = NA_real_)
```

- expr
An Expression representing a vector or matrix.

- axis
(Optional) The dimension across which to apply the function:

`1`

indicates rows,`2`

indicates columns, and`NA`

indicates rows and columns. The default is`NA`

.- keepdims
(Optional) Should dimensions be maintained when applying the atom along an axis? If

`FALSE`

, result will be collapsed into an \(n x 1\) column vector. The default is`FALSE`

.- object
A SumEntries object.

- values
A list of arguments to the atom.

- arg_objs
A list of linear expressions for each argument.

- dim
A vector representing the dimensions of the resulting expression.

- data
A list of additional data required by the atom.

`to_numeric(SumEntries)`

: Sum the entries along the specified axis.`is_atom_log_log_convex(SumEntries)`

: Is the atom log-log convex?`is_atom_log_log_concave(SumEntries)`

: Is the atom log-log concave?`graph_implementation(SumEntries)`

: The graph implementation of the atom.

`expr`

An Expression representing a vector or matrix.

`axis`

(Optional) The dimension across which to apply the function:

`1`

indicates rows,`2`

indicates columns, and`NA`

indicates rows and columns. The default is`NA`

.`keepdims`

(Optional) Should dimensions be maintained when applying the atom along an axis? If

`FALSE`

, result will be collapsed into an \(n x 1\) column vector. The default is`FALSE`

.