how to return cell array with varargout?

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Louis Tomczyk
Louis Tomczyk 2022 年 7 月 12 日
編集済み: Stephen23 2022 年 7 月 12 日
Dear all,
I know the title is not that explicit but I did not find a short way to formulate my question.
Here (MATHWORKS - Simple explanation - how to use varargout) was given an example to use .
I remind here the code suggested:
function varargout = varargoutexample(x)
% Demonstrates how to use VARAGOUT.
% Pass in a vector of values.
% Note that NARGOUT is the number of output
% arguments you called the function with.
for ii = 1:nargout
varargout{ii} = x.^ii;
end
How can I change the code so as to get a dynamic cell array as an output.
To be more explicit I imagine something like:
function varargout = varargoutexample(N,x)
for ii = 1:N
varargout{ii} = x.^ii;
end
such as when I call the function I have:
% in the shell
my_cell = cell(1,3); % pre-allocation
>> my_cell = varargoutexample(3,2)
my_cell =
1x3 cell array
{[2]} {[4]} {[8]}
And then get easy acces to the elements of my_cell :
my_cell{1} = 2
my_cell{2} = 4
my_cell{3} = 8
When I print the loop I have the expected result:
>> my_cell = varargoutexample(3,2)
ii =
1
varargout =
1×1 cell array
{[2]}
ii =
2
varargout =
1×2 cell array
{[2]} {[4]}
ii =
3
varargout =
1×3 cell array
{[2]} {[4]} {[8]}
But when I call my_cell I only get 2 which corresponds to the first loop result...
I hope I am clear enough.
Thanks a lot in advance!
Best regards,
louis
  3 件のコメント
Louis Tomczyk
Louis Tomczyk 2022 年 7 月 12 日
編集済み: Louis Tomczyk 2022 年 7 月 12 日
@Stephen23 thanks for the link, I didn't think about typing such keywords...

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採用された回答

Adam Danz
Adam Danz 2022 年 7 月 12 日
myCell = cell(1,3);
[myCell{:}] = myfunc(__)
  1 件のコメント
Louis Tomczyk
Louis Tomczyk 2022 年 7 月 12 日
such reactivity!
perfect, thanks a lot!
Best,
louis

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その他の回答 (1 件)

Jonas
Jonas 2022 年 7 月 12 日
if i understand you cirrectly, you want as dynamic output variable varargout, and each of the given should/can be a cell itself
so not this
[a,b,c]=varargoutexampleMultVar(3,2)
a = 2
b = 4
c = 8
but you want a cell
a=varargoutexample(3,2)
a = 1×3 cell array
{[2]} {[4]} {[8]}
function varargout = varargoutexampleMultVar(N,x)
varargout=cell(1,N);
for ii = 1:N
varargout{ii} = x.^ii;
end
end
function varargout = varargoutexample(N,x)
for ii = 1:N
varargout{1}{ii} = x.^ii;
end
end
  3 件のコメント
Louis Tomczyk
Louis Tomczyk 2022 年 7 月 12 日
@Stephen23 Yes that was obvious but I still don't understand the idea of needing to put exactly the right number of output arguments, for a function which will return time-varying number of outputs....
Indeed the syntaxt :
[mycell{:}]
is not obvious to me even if I admit I am far from being an expert...

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