MATLAB自动生成的函数可输入变量而不是.txt文件 [英] MATLAB automatically generated function to input a variable instead of a .txt file

问题描述

MATALB的导入数据"功能自动生成一个输入.txt文件并输出表的函数.此函数的前几行如下所示:

MATALB's "Import Data" feature automatically generates a function which inputs a .txt-file and outputs a table. The first few lines of this function looks like this:

function output= myfunction(filename)
delimiter = {';','='};

%% Read columns of data as text:
formatSpec = '%s%s%s%s%s%s%[^\n\r]';

%% Open the text file.
fileID = fopen(filename,'r');

dataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'TextType', 'string',  'ReturnOnError', false);

%% Close the text file.
fclose(fileID);

但是，我需要此函数来输入变量，而不是将具有完全相同效果的.txt文件.我已经将所有数据以变量的形式存储在.txt文件中.我以为我可以用变量替换filename，并删除fileID和fclose行的代码，但这是行不通的.

However, I need this function to input a variable instead of a .txt-file that will have the exact same effect. I have all the data stored in the .txt-file in the form of a variable already. I thought I could simply replace filename with the variable, and delete of the fileID and fclose lines of code, but it doesn't work.

推荐答案

在循环中使用此自动生成的函数循环遍历您拥有的文件(名称)

Use this auto-generated function in a loop to loop through the file(name)s that you have

% path to folder with txt-files
pFlr = pwd; % path to working directory
Lst = dir( fullfile(pFldr,'*.txt') ); % only get txt-files

for i = 1:length(Lst)
   % path to file
   pFl = fullfile( Lst(i).folder,Lst(i).name );
   % read file by calling the auto-generated function
   Dat1 = myfunction( pFl );
end

通过这种方式，您可以循环访问所有文件，例如将数据存储在表中:

In this way, you can access all your files in a loop and, e.g. store the data in a table:

k = 1; % control variable
for i = 1:length(Lst)
   % path to file
   pFl = fullfile( Lst(i).folder,Lst(i).name );
   % read file by calling the auto-generated function
   Dat1 = myfunction( pFl );


   % do something with this data, e.g. store it
   if i == 1 % allocate data if
      Dat = Dat1;
      % extend for allocation
      vSz= height(Dat1)*length(Lst);
      Dat(vSz,:) = Dat1(1,:); % assign the first row of the first table to the last row of the allocated table to expand it
   else
      Dat(k:k+size(Dat1)-1,:) = Dat1;
   end
   k = k + size(Dat1);
end
% crop table
Dat = Dat(1:k-1,:);

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