Create a distance matrix from cell seg data.

distance_matrix(csd)

## Arguments

csd |
A data frame with `Cell X Position`
and `Cell Y Position` columns, such as the result of
`read_cell_seg_data` . |

## Value

A square matrix with both dimensions equal to `nrow(d)`

.
The value at `[i, j]`

will be the distance from the cell
at row `i`

of `csd`

to the cell at row `j`

.
The returned matrix is symmetric.

## See also