You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ttv.m
    path of file: ./repos/scGEAToolbox/tensor_toolbox/@ktensor
    
    the code of the file until where you have to start completion: function c = ttv(a, v, dims)
%TTV Tensor times vector for ktensor.
%
%   Y = TTV(X,A,N) computes the product of Kruskal tensor X with a
%   (column) vector A.  The integer N specifies the dimension in X
%   along which A is multiplied.  If size(A) = [I,1], then X must have
%   size(X,N) = I.  Note that ndims(Y) = ndims(X) - 1 because the N-th

    
function c = ttv(a, v, dims)
%TTV Tensor times vector for ktensor.
%
%   Y = TTV(X,A,N) computes the product of Kruskal tensor X with a
%   (column) vector A.  The integer N specifies the dimension in X
%   along which A is multiplied.  If size(A) = [I,1], then X must have
%   size(X,N) = I.  Note that ndims(Y) = ndims(X) - 1 because the N-th
%   dimension is removed.
%
%   Y = TTV(X,{A1,A2,...}) computes the product of tensor X with a
%   sequence of vectors in the cell array.  The products are computed
%   sequentially along all dimensions (or modes) of X. The cell array
%   contains ndims(X) vectors.
%
%   Y = TTV(X,{A1,A2,...},DIMS) computes the sequence tensor-vector
%   products along the dimensions specified by DIMS.
%
%   See also TENSOR/TTV, KTENSOR, KTENSOR/TTM.
%
%Tensor Toolbox for MATLAB: <a href="https://www.tensortoolbox.org">www.tensortoolbox.org</a>


%%%%%%%%%%%%%%%%%%%%%%
%%% ERROR CHECKING %%%
%%%%%%%%%%%%%%%%%%%%%%

% Check the number of arguments
if (nargin < 2)
    error('TTV requires at least two arguments.');
end