MATLAB: How to use a data file as input to a function

fopenreference to a cleared variable

I am trying to write a function that will allow me to input a .dat file, which will then be read as the input for the function.
The code I have tried using is:
      function beam_analysis(obj)
      clear all
      fid=fopen(obj,'r');
      Title=fgets(fid);
Where the command would be:
      beam_analysis('input.dat')
This is returning the error:
      ??? Reference to a cleared variable obj.
      Error in ==> beam_analysis at 4
      fid=fopen(obj,'r');
Is there a better way to go about this? FYI – the input file is just a bunch of tables, in case you know of a better way of inputting this data. Thanks!

Best Answer

Why oh why would you put a 'clear all' as the first line of a function?? Functions have their own workspace, so the only variables they see are those you pass in and those created inside the function....
Calling 'clear' inside a function is completely unnecessary and, as you can see, troublesome. Remove this line and you will be on your way.
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