I\'m using Windows 7 64 bit. Each time, I\'m using plot function, plot windows will shows and draws successfully, but after that it stops responding and must shut down it.>
Oh. My friend shows me this command and it works fine :
pkg rebuild -noauto oct2mat
The command reinstalls the package but marks it to not load by default at startup. This behavior has now been changed and new releases of Forge packages will NOT load by default.
The problem is that the package oct2mat should never be loaded. It shadows several functions of Octave core so it starts acting weird. Unless you really have a need for this package you better off just removing it.
The purpose of oct2mat is to make up for the lack of missing functions in Matlab and make code written for Octave run in Matlab. If you don't need oct2mat, remove it. No one needs all packages installed, and it can actually make your Octave install worse such as in the case of oct2mat.