[GRASS-git] [OSGeo/grass] b6712d: scripts/i.spectral: show error message if one of t...

[Tomas Zigo]

  Branch: refs/heads/releasebranch_8_0
  Home:   https://github.com/OSGeo/grass
  Commit: b6712d2250b93de31797b14b6d483651f9bb59e3
      https://github.com/OSGeo/grass/commit/b6712d2250b93de31797b14b6d483651f9bb59e3
  Author: Tomas Zigo <50632337+tmszi at users.noreply.github.com>
  Date:   2021-12-02 (Thu, 02 Dec 2021)

  Changed paths:
    M scripts/i.spectral/i.spectral.html
    M scripts/i.spectral/i.spectral.py

  Log Message:
  -----------
  scripts/i.spectral: show error message if one of the supported monitor isn't running (#1991)

* scripts/i.spectral: show error message if one of the supported monitor isn't running

By default, d.linegraph is used internally to create a graph image
which requires the launch of one of the supported monitor (cairo, png, ps).

Co-authored-by: Markus Neteler <neteler at osgeo.org>