Special-case display of "LSTM" name

because of #143

Eventually we plan to change to a standard LSTM formulation

ADBench/plot_graphs.py

@@ -76,7 +76,7 @@ def graph_data(build_type, objective, maybe_test_size, function_type):
 
     test_size = ", ".join([utils.cap_str(s) for s in maybe_test_size[0].split("_")]) if len(maybe_test_size) == 1 else None
     has_ts = test_size is not None
-    graph_name = (f"{objective.upper()}" +
+    graph_name = (f"{objective_display_name(objective)}" +
                   (f" ({test_size})" if has_ts else "") +
                   f" [{function_type.capitalize()}] - {build_type}")
     graph_save_location = os.path.join(build_type, function_type, f"{graph_name} Graph")
@@ -85,6 +85,18 @@ def graph_data(build_type, objective, maybe_test_size, function_type):
 
     return (graph_name, graph_save_location)
 
+# What we call LSTM is not quite a full LSTM.  Rather it's an LSTM
+# with diagonal weight matrices.  We don't want to be misleading so we
+# rename the graph.  Eventually we will implement a full LSTM and we
+# will remove this special case.  See
+#
+#     https://github.com/awf/ADBench/issues/143
+def objective_display_name(objective):
+    if objective.upper() == "LSTM":
+        return "D-LSTM"
+    else:
+        return objective.upper()
+
 has_manual = lambda tool: tool.lower() in ["manual", "manual_eigen"]
 
 def tool_names(graph_files):