I am trying to install gnuplot on my mac. after trying
brew install gnuplot, I get the following errors:
You must 'brew link lua jpeg' before gnuplot can be installed
And when I try
brew link lua jpeg I get the following error:
Could not symlink file: /usr/local/Cellar/lua/5.1.4/include/lualib.h /usr/local/include is not writable. You should change its permissions.
Any suggestion? BTW, my XCode and brew are updated.