Error in help of matlab

When i write in command window of matlab "help disp" appear of message: "No help found for disp.m." for example. Help me please!

Answer 1

[Walter Roberson]

If it is happening for everything, try

restoredefaultpath

If it is only happening for some routines then use (for example)

which -all disp

and see if the first thing that is reported is one of your files; if it is then you need to rename or delete it so that the MATLAB versions can be found.

[Rodrigo Franco]

Hi, i write the

restoredefaultpath in command windows and after write help disp again and continue with the same problem, look of image:

Obs.: This problem happening with everything functions.

[Walter Roberson]

What does

which -all which

report? What does

fileattrib(fullfile(matlabroot, 'toolbox', 'matlab', 'general', 'which.m'))

report? (It might say that the file does not exist, which is information in itself.)