To write to a file in Matlab, use the fopen function to open a file with write permission and the fprintf function to write text to the file. To read from a file, use the fopen function to open the file with read permission and the fscanf function to read data from the file. Matlab has functions like circshift to circularly shift matrix elements, sort to sort arrays in ascending or descending order, and issorted to check if elements are already sorted.

1. Matlab: Working with files

2. Writing files To write a new file, use the function: fid= fopen(‘<filename>’, ‘wt’); To write to a new file, use the function: fprintf(fid, ‘Hello, I am writing this into the file’);

3. Writing files Use the following set of commands to create a new file and write a sentence into that file. View the file in notepad.

4. Writing files

5. Writing files To open a file in text mode, specify the permission using one of the listed Permission Value, and attach the letter 't'. For example, use 'rt' or 'wt+'.

6. Reading Files Use the command ‘fopen(‘<filename>, rt’) to open a file to be read in text mode. Use the fscanf(fid, format, size)command to read form the file.

7. Reading Files

8. Reading Files

9. Shifting and Sorting matrices Shift and Sort Functions circshift Circularly shift matrix contents. sortSort array elements in ascending or descending order. sortrows Sort rows in ascending order. issorted Determine if matrix elements are in sorted order.

10. Shifting and Sorting matrices

11. Visit more self help tutorials Pick a tutorial of your choice and browse through it at your own pace. The tutorials section is free, self-guiding and will not involve any additional support. Visit us at www.dataminingtools.net