Creating empty cell array with function

3 次查看（过去 30 天）
Carly Hudson
Carly Hudson 2022-2-28
评论： AndresVar 2022-3-1
function link_set = build_links(link_vectors);
% Use the 'cell' 'and 'size' commands to create an empty cell array the
% same size as link_vectors, named 'link_set'
link_set = cell(1,size(link_vectors));
I am working on a project in MATLAB Grader and it has been a while since iv'e used MATLAB. I'm having trouble creating this array and I keep getting the "Not enough input arguments." error. Any help or guidamce would be greatly appreciated.
  3 个评论
显示 1更早的评论
Carly Hudson
Carly Hudson 2022-2-28
function link_set = build_links(link_vectors)
% Take a set of link vectors and augment each with a zero vector representing
% the base of the link
%
% Input:
%
% link_vectors: a 1xn cell array, each element of which is an mx1 vector
% from the base to end of a link, as seen in its *local* coordinate
% frame
%
% Output:
%
% link_set: a 1xn cell array, each element of which is a mx2 matrix whose
% first column is all zeros (representing the base of the link in its
% local frame) and whose second column is the link vector (end of the
% link) in its local frame
%%%%%%%%%%%%%%
% Use the 'cell' 'and 'size' commands to create an empty cell array the
% same size as link_vectors, named 'link_set'
%%%%%%%%%%%%%
% Loop over the vectors in link_vectors, constructing a matrix whose
% first column is all zeros and whose second column is the link vector,
% and saving this matrix in the corresponding column of link_set
end
this is the whole prompt. im just confused because link_vectors is something that already exists. so i dont know why i cant just call it in when i define link_set
AndresVar
AndresVar 2022-3-1
Ran in:
I see, well here is an example, for n=2, m=3. This function just creates a cell array the same size as the input, which is the first part of what your function should do.
anInput = {[1;2;3],[4;5;6]}; % variable to use as an input
size(anInput)
ans = 1×2
1 2
anOutput = theFunction(anInput); % function call returns an output
size(anOutput) % the function made an output with the same size as the input
ans = 1×2
1 2
function theOutput = theFunction(theInput) % function definition block
theOutput = cell(size(theInput));
%%% make a matrix
end
Btw to be clear in your actual example: link_vectors is an input, you call build_links, and it returns a copy of link_set.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

KSSV
KSSV 2022-2-28
It seems you are straight away running the function. You need to provide the inputs to the function and then call the function.
link_vectors = rand(1,3) ; % define your input variables
% now call the function
link_set = build_links(link_vectors);
  1 个评论
Carly Hudson
Carly Hudson 2022-2-28
function link_set = build_links(link_vectors)
% Take a set of link vectors and augment each with a zero vector representing
% the base of the link
%
% Input:
%
% link_vectors: a 1xn cell array, each element of which is an mx1 vector
% from the base to end of a link, as seen in its *local* coordinate
% frame
%
% Output:
%
% link_set: a 1xn cell array, each element of which is a mx2 matrix whose
% first column is all zeros (representing the base of the link in its
% local frame) and whose second column is the link vector (end of the
% link) in its local frame
%%%%%%%%%%%%%%
% Use the 'cell' 'and 'size' commands to create an empty cell array the
% same size as link_vectors, named 'link_set'
%%%%%%%%%%%%%
% Loop over the vectors in link_vectors, constructing a matrix whose
% first column is all zeros and whose second column is the link vector,
% and saving this matrix in the corresponding column of link_set
end
this is the whole prompt. im just confused because link_vectors is something that already exists. so i dont know why i cant just call it in when i define link_set

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Function Creation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by