def gnuplot(f, *between):
''' Plot the function f within the optional limits *between '''
# Create an instance of the gnuplot class
graph = Gnuplot()
# Get the full file name and root_file_name (excluding extension)
file_name, root_file_name = graph.file_name, graph.root_file_name
# Plot the function
graph.plot_function(f, *between)
# Return a string / html representation of the graph
return StrWithHtml('Image saved to ' + file_name,
'''<img src="{}.svg" style="width: 100%" />'''.format(root_file_name))
