Question

考虑以下示例

%%
a = 1:10;
%%
b = 11:20;
%%
c = 21:30

它分为3个部分，我可以单独调用每个部分Alt + Shift + X 但是如果我想通过电话呼叫每个部分，例如另一个文件

testloadfile
d = a*5;

加载此数据但只需要使用a，因此调用整个文件会浪费时间和内存我可以通过电话调用指定的代码段吗？或者它不可能

Answer 1

其他人在这里回答了这个问题：Run particular cell section from command line in Matlab?

Matlab中没有原生解决方案来执行您的要求。链接的答案使用自定义Matlab类来加载脚本并运行特定的代码段。这是链接中的代码（不是我写的）：

classdef cellRunner < handle
  properties ( SetAccess = private )
    fileName
    fileInfo
    cellInfo
    cellNames = {};
  end
  methods 
    function obj = cellRunner ( file ) % constructor
      if nargin == 0                        
        obj.fileName = 'cellScript.m';      % default file for testing
      else
        obj.fileName = file;                % store user file
      end
      obj.parseFile();                      % read the file into memory
    end
    function obj = parseFile ( obj )
      if ~isempty ( obj.fileInfo )                        % on parsing check to see if its been parsed before
        if isequal ( obj.fileInfo, dir ( obj.fileName ) ) % Check date stamp (has cell file been modified
%           disp ( 'file not changed - reading skipped' );  % if not skip
%           reading 
          return
        end
      end
      obj.fileInfo = dir ( obj.fileName );                % store file info
      fid = fopen ( obj.fileName );                       % open file for reading
      if fid ~= -1
        index = 0;                                        % this is the index of each cell
        inCell = false;                                   % has it found a cell to start reading
        lines = cell(0);                                  
        while ( true )
          line = fgetl ( fid );                           % read the line in the file
          if line == -1; break; end                       % check for the end of the file
          sLine = strtrim ( line );                       % trim any white space
          if length ( sLine ) > 2 && strcmp ( sLine(1:2), '%%' ) % check to see if its the start of a cell
            if index > 0                                  % Store the last cell data                
              obj.cellInfo{index} = lines;                % in class to run when required
            end
            index = index + 1;                            % increment the index
            obj.cellNames{index} = strtrim ( sLine(3:end) ); % save the name of the cell
            lines = cell(0);                              % re-initialise the lines var
            inCell = true;                                % the start of the cells have been found
          elseif inCell                                   % if reading a cell array
            lines{end+1} = line;                          % add each line to the lines var
          end          
        end
        if index > 0                                      % make sure and save the last cell when finished reading
          obj.cellInfo{index} = lines;
        end
        fclose ( fid );
      else
        error ( 'cellRunner:fileError', 'unable to read file' );
      end
    end
    function obj = runCell ( obj, arg )
      % obj.runCell ( 'cellName' );
      % obj.runCell ( index );
      obj.parseFile();                                    % check that the file hasn't been changed
      if ischar ( arg )                                   % if user provided a char then search for it
        index = strcmp ( arg, obj.cellNames );            % find the index
        if ~any ( index )                                 % check it was found
          error ( 'cellRunner:notFound', '%s not found', arg ); 
        end
      else
        index = arg;                                      % if index is an integer (not checked - assumed if not char)
        if index < 1 || index > length ( obj.cellInfo )   % check integer is valid
          error ( 'cellRunner:notFound', 'Index %d not found', arg );
        end
      end
      commands = obj.cellInfo{index}{1};                  % start to build the command to execute.
      inBlock = false;
      for ii=2:length(obj.cellInfo{index})                % loop around - ignoring any commented lines.
        nextLine = strtrim ( obj.cellInfo{index}{ii} ); 
        if inBlock
          if length ( nextLine ) == 2 && strcmp ( nextLine, '%}' );
            inBlock = false;
          end
          continue
        end
        if length ( nextLine ) == 2 && strcmp ( nextLine, '%{' );
          inBlock = true;
          continue
        end
        if length ( nextLine ) >= 1 && strcmp ( nextLine(1), '%' )
          continue;
        end
        commands = sprintf ( '%s;%s', commands, obj.cellInfo{index}{ii} ); % build a parge string to eval
      end
      evalin('base',commands);                            % eval the expression in the base workspace.
    end
  end
end

如果您将脚本命名为“myscript.m”并标记您的部分，则可以按如下方式使用上述类：

obj = cellRunner('myscript.m');
obj.runCell ( 'cellA' );

你也可以像这样使用块索引

obj.runCell ( 3 );

在代码单元格中创建的变量将在工作区中，就像您自己运行它们一样

通过调用调用代码的不同部分

1 个答案: