Packages installing but not working

[richard.peter3]

Hi,
I'm fairly new to Octave and I have been installing several packages and
their dependencies. I am using QtOctave on Ubuntu and initially I installed
the audio package to a different path by changing the installation_prefix
variable (QtOctave didn't have permission to write to
/usr/share/Octave/Packages/). all packages have been installed using "pkg
install -forge <packagename>" to ensure I have the latest versions. This
worked and all was fine for a while.

When I tried to install the signal package the same way it was trying to
make a change within the Architecture_Dependent_Prefix location. I decided
changing this variable may cause more problems than it solved so I
backtracked and decided to uninstall all the packages using QtOctave and
install them by running sudo octave in the terminal.

This seemed to go without a hitch and the original package folder was empty
and all the packages were in /usr/share/octave/packages. After restarting
QtOctave, all the packages were displayed using pkg list. 

However, while the audio package is still working as normal, the signal
package does not seem to be recognised. eg "help specgram" returns error:
help: `specgram' not found, despite the package being loaded and the
specgram.m file being in the folder .../packages/signal-1.2.0

I have checked to see if it is just the signal package by installing io and
statistics but running help <function name> for their functions is also
giving the same error.

Any help would be appreciated



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