我试图安装MATLAB的psychtoolbox-3和我收到此错误:无法找到包MATLAB的psychtoolbox-3
$ sudo apt-get install matlab-psychtoolbox-3
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package matlab-psychtoolbox-3
任何人能告诉我怎么解决这个问题?