How to Get a Structure as an Output from a Function?

Question

Ibro Tutic 2017-5-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/339839-how-to-get-a-structure-as-an-output-from-a-function

评论： Rena Berman 2021-5-6

I have this function made to sort data into a structure. However, when I call a directory as the input, I can't seem to get an output. I call it by doing

filesort(dir([foldername(1).standard,'\*.dat'])).

However, when I set x=sortdata(dir([foldername(1).standard,'\*.dat'])), within the function and run it, I get my desired Srt structure.

Any ideas?

This is the function:

function []=filesort(x)
C = {'Z1P'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z1P = S(idx);
C = {'Z2P'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z2P = S(idx);
C = {'Z1G'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z1G = S(idx);
C = {'Z2G'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z2G = S(idx);
C = {'Z3K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z3K = S(idx);
C = {'Z4K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z4K = S(idx);
C = {'Z5K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z5K = S(idx);
C = {'Z3M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z3M = S(idx);
C = {'Z4M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z4M = S(idx);
C = {'Z5M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z5M = S(idx);
C = {'Z6MS'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z6MS = S(idx);
C = {'Z7PR'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z7PR = S(idx);
C = {'Z7PR1'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z7PR1 = S(idx);
end

2 个评论
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Stephen23 2020-12-26

在 MATLAB Online 中打开

Original question by Ibro Tutic on 11th of May 2017 retrieved from Google Cache:

http://web.archive.org/web/20201226065926/https://webcache.googleusercontent.com/search?q=cache%3A3av-YLdEh_0J%3Ahttps%3A%2F%2Fwww.mathworks.com%2Fmatlabcentral%2Fanswers%2F339839-how-to-get-a-structure-as-an-output-from-a-function

How to Get a Structure as an Output from a Function?

I have this function made to sort data into a structure. However, when I call a directory as the input, I can't seem to get an output. I call it by doing

filesort(dir([foldername(1).standard,'\*.dat'])).

However, when I set x=sortdata(dir([foldername(1).standard,'\*.dat'])), within the function and run it, I get my desired Srt structure.

Any ideas?

This is the function:

function []=filesort(x)
C = {'Z1P'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z1P = S(idx);
C = {'Z2P'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z2P = S(idx);
C = {'Z1G'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z1G = S(idx);
C = {'Z2G'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z2G = S(idx);
C = {'Z3K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z3K = S(idx);
C = {'Z4K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z4K = S(idx);
C = {'Z5K'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z5K = S(idx);
C = {'Z3M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z3M = S(idx);
C = {'Z4M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z4M = S(idx);
C = {'Z5M'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z5M = S(idx);
C = {'Z6MS'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z6MS = S(idx);
C = {'Z7PR'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z7PR = S(idx);
C = {'Z7PR1'};
S = x;
fun = @(s)cellfun('isempty',regexp(s,C,'once'));
idx = cellfun(@(s)any(~fun(s)),{x.name});
Srt.Standard(1).Z7PR1 = S(idx);
end

Rena Berman 2021-5-6

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Answer 1

Stephen23 2017-5-11

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/339839-how-to-get-a-structure-as-an-output-from-a-function#answer_266618

编辑：Stephen23 2017-5-11

在 MATLAB Online 中打开

You did not define your function to have any output:

function []=filesort(x)
         ^^ no output argument!

Also your code is much longer and much more complicated than it needs to be. Try this (I just tested it):

function otpS = filesort(inpS)
C = {'Z1P','Z2P','Z1G','Z2G','Z3K','Z4K','Z5K','Z3M','Z4M','Z5M','Z6MS','Z7PR','Z7PR1'};
N = {inpS.name};
otpS = struct();
for k = 1:numel(C)
    idx = cellfun('isempty',regexp(N,C{k},'once'));
    otpS.(C{k}) = inpS(~idx);
end
end

Tip: computers are only good at doing one thing: repeatedly doing small stupid tasks. So when you find yourself copy-and-pasting code like that, and repeating the same code over and over again, then you are doing the computer's job. Instead of wasting your life, get the computer to do it: use a loop.