## Comparison of the grids of two volume objects

### Description

The grid.equal function checks that two volumes share the same grid, i.e. the same frame of reference, the same origin point, and the same dx, dy, dz steps.

### Usage

grid.equal(vol1, vol2)


### Arguments

 vol1, vol2 "volume" class objects

### Value

Returns TRUE if the 2 volumes share the same grid.

### Examples

# loading of toy-patient objects
patient <- toy.load.patient (modality = c ("ct","mr","rtdose"), roi.name = "",
dxyz = c (4, 4, 4), beam.nb = 1)

# Comparison of the grids
grid.equal (patient$rtdose[[1]], patient$ct[[1]])
grid.equal (patient$mr[[1]], patient$ct[[1]])