Update message for data.json and lp__ hist plotting

gui/src/app/pages/HomePage/DataGenerationWindow/DataRFileEditor.tsx

@@ -124,7 +124,7 @@ if (typeof(data) != "list") {
   const contentOnEmpty = useMemo(() => {
     const spanElement = document.createElement("span");
     const t1 = document.createTextNode(
-      "Define a dictionary called data to update the data.json. ",
+      "Define a list called data to update the data.json. ",
     );
     const a1 = document.createElement("a");
     a1.onclick = () => {

gui/src/app/pyodide/AnalysisPyFileEditor.tsx

@@ -191,17 +191,14 @@ const AnalysisPyFileEditor: FunctionComponent<Props> = ({
 const analysisPyTemplate = `import matplotlib.pyplot as plt
 
 # Get the parameter names
-pnames = draws.parameter_names
-
-# Show histogram for first parameter
-for pname in pnames:
-    print(pname)
-    samples = draws.get(pname)
-    print(samples.shape)
-    plt.hist(samples.ravel(), bins=30)
-    plt.title(pname)
-    plt.show()
-    break
+print(draws.parameter_names)
+
+# plot the lp parameter
+samples = draws.get("lp__")
+print(samples.shape)
+plt.hist(samples.ravel(), bins=30)
+plt.title("lp__")
+plt.show()
 `;
 
 type ConsoleOutType = "stdout" | "stderr";