double type+ surf error

how can i show the surface of image b? Please advise. Thankssss

Answer 1

[Thukiller]

When you use 'surf(x)', x cannot be a 3-dimensional vector，maybe you can use 'surf(b(:,:,1), b(:,:,2), b(:,:,3))'

if you need to know more about surf(), you can use 'doc surf'

[Ou Jin Sheng]

Thank you @Thukiller, It works.