Fixes to phymcmc_plotter

- graph file savename now correctly handles separators w os.sep
- triangle plot saved to svg format to avoid stripy plot
- see corner.py stripy bug: dfm/corner.py#261

bin/phymcmc_plotter

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright (C) 2017-2021 Catherine Beauchemin <cbeau@users.sourceforge.net>
+# Copyright (C) 2017-2024 Catherine Beauchemin <cbeau@users.sourceforge.net>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
 # =============================================================================
 #
 import argparse
+import os
 import phymcmc.plot
 
 #
@@ -49,7 +50,7 @@ def parse_args():
 	# Parsing arguments
 	args = parser.parse_args()
 	# Path + basename for plot(s)
-	savename = args.chainfile.split('/')[-1].split('.hdf5')[0]
+	savename = args.chainfile.split(os.sep)[-1].split('.hdf5')[0]
 	savename = args.savedirectory + '/' + savename
 	# Parse types of plots requested
 	plotsrequested = set(args.type.split(','))
@@ -77,7 +78,7 @@ if {'hist','all'} & plotsrequested:
 
 if {'triangle','all'} & plotsrequested:
 	fig = phymcmc.plot.triangle( args.chainfile, nburn=args.nburn )
-	fig.savefig(savename+'_triangle.pdf', bbox_inches='tight')
+	fig.savefig(savename+'_triangle.svg', bbox_inches='tight')
 
 if {'square','all'} & plotsrequested:
 	gridfig = phymcmc.plot.square( args.chainfile, nburn=args.nburn )