Hello Hany,
This may be due to a function shadowing issue for a function used in the underlying implementations of these other functions. Try the following debugging steps in order:
1) Try to reset your MATLAB path:Plain Text
>> restoredefaultpath
>> rehash toolboxcache
>> savepath
This step may resolve or reveal a shadowing issue. If you see a warning about name conflicts, please try to delete or rename the local function that has a name conflict.
2) Try to regenerate your MATLAB preferences.
3) As a last resort, try a clean reinstallation of MATLAB.
