added code so that now I return the max and min radius once all cells with a metallicity greater than -6 have been selected
changed so that it should just be looking at gas with metallicity around -6 when it calculates zMinRadius and zMaxRadius
had added code where the error bars were defined using loops but thats not the right way to include them!
successfully added in max and min values and saves as two panel plot.  I still dont know why it puts two symbols in the legend though...