Create anaffine2dobject that defines a pure translation.

A = [ 1 0 0 0 1 0 40 40 1 ]; tform = affine2d(A)

tform = affine2d with properties: T: [3x3 double] Dimensionality: 2

Check if the transformation is a pure translation.

tf = isTranslation(tform)

tf = 1

Create anaffine3dobject that defines a different scale factor in each dimension.

Sx = 1.2; Sy = 1.6; Sz = 2.4; tform = affine3d([Sx 0 0 0; 0 Sy 0 0; 0 0 Sz 0; 0 0 0 1]);

tf = affine3d with properties: T: [4x4 double] Dimensionality: 3

Check if the transformation is a pure translation. Sincetformscales the object,

tf = isTranslation(tform)

tf = 0

As expected, the transformation is not a pure translation since scaling changes the size and shape of an input volume.