From 6305016e7763ae884a8deb1575d078857aaf05e0 Mon Sep 17 00:00:00 2001
From: Bob Myhill <myhill.bob@gmail.com>
Date: Wed, 20 Sep 2023 19:53:47 +0100
Subject: [PATCH] improve label format

---
 pyrolite/util/classification.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pyrolite/util/classification.py b/pyrolite/util/classification.py
index be88edc5..f43cfce9 100644
--- a/pyrolite/util/classification.py
+++ b/pyrolite/util/classification.py
@@ -383,7 +383,7 @@ def __init__(self, which_model=None, **kwargs):
 
         with open(src, "r") as f:
             config = json.load(f)
-        kw = dict(scale=100.0, xlim=[35, 85], ylim=[0, 20])
+        kw = dict(scale=100.0, xlim=[30, 90], ylim=[0, 20])
         kw.update(kwargs)
         poly_config = {**config, **kw}
         super().__init__(**poly_config)
@@ -455,10 +455,11 @@ def add_to_axes(
                         xy=(x, y),
                         ha="center",
                         va="center",
+                        fontsize=kwargs.get("fontsize", 8),
                         **subkwargs(kwargs, ax.annotate),
                     )
 
-        ax.set(xlabel="$SiO_2$", ylabel="$Na_2O + K_2O$")
+        ax.set(xlabel="SiO$_2$", ylabel="Na$_2$O + K$_2$O")
         return ax