code: def view_as_complex(input):
      if ivy.shape(input)[-1] != 2:
          raise ivy.exceptions.IvyError(
              "The last dimension must have a size of 2"
          )
  
      real, imaginary = ivy.split(
          ivy.stop_gradient(input, preserve_type=False),
          num_or_size_splits=2,
          axis=ivy.get_num_dims(input) - 1,
      )
      dtype = (
          ivy.complex64
          if input.dtype == ivy.float32
          else ivy.complex128
      )
      real = ivy.squeeze(real, axis=ivy.get_num_dims(real) - 1).astype(
          dtype
      )
      imag = ivy.squeeze(
          imaginary, axis=ivy.get_num_dims(imaginary) - 1
      ).astype(dtype)
      complex_ = real + imag * 1j
      return ivy.array(complex_, dtype=dtype)
  
imports: import ivy
  from ivy.func_wrapper import with_unsupported_dtypes, with_supported_dtypes
  from ivy.functional.frontends.torch.func_wrapper import to_ivy_arrays_and_back
  from ivy.functional.frontends.torch import promote_types_of_torch_inputs
  import ivy.functional.frontends.torch
label_desc: Use image node_id 43 for calling a global function with example usage: view_as_complex(input) and returns: ivy