Change Matrix Type

A Change Matrix gives the number of cells to transition from one category to another. Each entry has a From category, a To category, and a whole-number count of cells.

Calc Change Matrix is the typical source: given a Transition Matrix of proportional rates and the current landscape, it multiplies each rate against the landscape's actual class areas to produce the corresponding cell counts. Patcher and Expander both consume one directly to know how many cells of each transition to allocate spatially, and each also returns a remainingChanges output — the portion left unallocated after that step. Add Change Matrix sums two Change Matrices together, and Modulate Change Matrix splits one in two using a Percent Matrix of rates, producing a modulatedChanges matrix and a complementary complementaryChanges matrix.

The change matrix editor presents a table with fixed From/To/Cells columns.

A Change Matrix constant has its own dedicated syntax in EGO Script, the same shape as Transition Matrix's: each entry is written FROM→TO CELLS, with FROM and TO as integers joined directly by → with no space. Unlike Transition Matrix's rate, CELLS is an integer, not a real number. As with Transition Matrix, a stationary entry (FROM equal to TO) cannot be written. Commas between entries are optional:

[
  1->2 150,
  1->3 75,
  2->1 40,
  3->1 200
]

• Converted from: Lookup Table Type and Table Type — the table must have the columns From* (Real), To* (Real), and Cells (Real).

• Converted to: Lookup Table Type and Table Type, using that same column layout.

See Type System for the complete conversion reference across all types.