libqwt5-qt4 software package provides Qt4 widgets library for technical applications (runtime), you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libqwt5-qt4
libqwt5-qt4 is installed in your system.
Make ensure the libqwt5-qt4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libqwt5-qt4 *
You will get with libqwt5-qt4 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libqwt5-qt4 |
| Version | 5.2.3-1 |
| Description | Qt4 widgets library for technical applications (runtime) |
| Sub Section | libs |