Steps for input output functions - lower level file, MATLAB in Statistics

Steps for input output functions - Lower level file:

The steps involved are as shown below:

Open the file.
Read the file, write to the file, or append to the file.
Close the file.

At first, the steps included in opening and closing the file will be explained. Many functions which perform the middle step of reading from or writing to the file will be explained consequently.

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