Places the nodes of a graph according to a specified layout.

## Arguments

- graph
A graph of class

`graphMCP`

or class`entangledMCP`

.- nrow
The desired number of rows.

- ncol
The desired number of columns.

- byrow
Logical whether the graph is filled by rows (otherwise by columns).

- topdown
Logical whether the rows are filled top-down or bottom-up.

- force
Logical whether a graph that has already a layout should be given the specified new layout.

## Details

If one of `nrow`

or `ncol`

is not given, an attempt is made to
infer it from the number of nodes of the `graph`

and the other
parameter. If neither is given, the graph is placed as a circle.

## Author

Kornelius Rohmeyer rohmeyer@small-projects.de

## Examples

```
g <- matrix2graph(matrix(0, nrow=6, ncol=6))
g <- placeNodes(g, nrow=2, force=TRUE)
```