save the output of system command using matlab

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Ano
Ano 2016-11-28
评论： Jan 2016-11-29
Hello! I am executing a system command via matlab. in the command I am writing the output to a file. when running the code I can find the generated file but I want that file be passed to Matlab as a variable, how can I get to this ? see the code bellow (I want something so that fileA.txt be attributed to cmdout or any thing similar so Matlab can recognize and work directly with the file)
command = 'MyInstuction >fileA.txt';
[status,cmdout] = system(command);

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采纳的回答

Steven Lord
Steven Lord 2016-11-29
Use concatenation or sprintf to assemble a command for use with the system function that needs to include information from a variable.
myfilename = 'fileA.txt';
command = ['MyInstuction > ' myfilename]
% I left off the semicolon on the previous line deliberately
% so you can see the command to be executed
[status,cmdout] = system(command);

更多回答（2 个）

Walter Roberson
Walter Roberson 2016-11-28
Leave off the redirection. Just
command = 'MyInstuction';
[status,cmdout] = system(command);
Ano
Ano 2016-11-29
thank you for your reply!
  • I have made the change that you have suggested . it takes a long time since the generated file is very large. any other alternatives ??!!
  • I get cmdout as a 'char', how can I extract my data from it or how can I know where my data is placed in cmdout?Best regards!
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Ano
Ano 2016-11-29
thank you Jan Simon, I posted the comment as an answer because there is no notification for comments and the time response is really very critical!
Jan
Jan 2016-11-29
If the repsonse is time critical, please answer my questions for clarifications. I'd really like to assist you, but I cannot guess, "how can I know where my data is placed".

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