How to solve Reference to non-existent field 'folder'.

2 次查看（过去 30 天）
Skydriver
Skydriver 2019-11-3
编辑： Stephen23 2019-11-3
I have a coding like this
folder='D:\\MultiLinierRegression\OutputRd'
fils=dir([folder '\*.txt']); % lists all the files with a .txt extension in myfolder
[~,idx]=sort({fils.name}); % index to load .txt files alphabetically
temp=importdata([fils(idx(1)).folder '\' fils(idx(1)).name]); % read A.txt
Y=temp(:,1); X=temp(:,2:end);
for ii=idx(2:end)
temp=importdata([fils(ii).folder '\' fils(ii).name]);
X =[X temp(:,2:end)];
end
But I got a message like this
Reference to non-existent field 'folder'.
Error in CalcRdAll (line 8)
temp=importdata([fils(idx(1)).folder '\' fils(idx(1)).name]); % read A.txt
Is there any one can help?

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2019-11-3
编辑：Stephen23 2019-11-3
The folder field (and recursive folder searching) was added in R2016b.
As you are not using the recursive folder search you can simply do this:
D = 'D:\\MultiLinierRegression\OutputRd'
S = dir(fullfile(D,'*.txt'));
[~,idx] = sort({S.name}); % index to load .txt files alphabetically
temp = importdata(fullfile(D,S(1).name));
Y = temp(:,1);
X = temp(:,2:end);
for ii = idx(2:end)
temp = importdata(fullfile(D,S(ii).name));
X = [X,temp(:,2:end)];
end
  2 个评论
Skydriver
Skydriver 2019-11-3
Thank you with your respond,
But in my coding I got the massage like this
Error using horzcat
The following error occurred converting from double to struct:
Conversion to struct from double is not possible.
Error in CalcAll (line 14)
X = [X,temp(:,2:end)];
Stephen23
Stephen23 2019-11-3
编辑：Stephen23 2019-11-3
Apparently your file data do not all have the same sizes. You can avoid this error by importing into a cell array or a structure, e.g.:
D = 'D:\\MultiLinierRegression\OutputRd'
S = dir(fullfile(D,'*.txt'));
for ii = 1:numel(S)
S(ii).data = importdata(fullfile(D,S(ii).name));
end
After the loop you can investigate the sizes, adjust the sizes, and concatenate if possible.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Structures 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