libqwt-doc 6.1.4-2 (riscv64 binary) in ubuntu hirsute

 The Qwt library contains Qt GUI Components and utility classes which
 are primarily useful for programs with a technical background. Most of
 these widgets are used to control or display values, arrays, or ranges
 of type double.
 .
 This package contains the Qwt library documentation and programming examples
 for developers.