From 437e282d209fd540a1d5439069324d4b30588e43 Mon Sep 17 00:00:00 2001
From: "Auguston, Mikhail" <maugusto@nps.edu>
Date: Mon, 24 Feb 2020 13:31:48 -0800
Subject: [PATCH] Upload New File

---
 .../Example42_Bar_Chart.mp                    | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Firebird_Pre_loaded_examples/Example42_Bar_Chart.mp

diff --git a/Firebird_Pre_loaded_examples/Example42_Bar_Chart.mp b/Firebird_Pre_loaded_examples/Example42_Bar_Chart.mp
new file mode 100644
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+++ b/Firebird_Pre_loaded_examples/Example42_Bar_Chart.mp
@@ -0,0 +1,53 @@
+/*
+ Example42
+ Assembling statistics about a current trace in a TABLE and rendering it.
+ Table and bar chart example, run for scope 1
+*/
+
+SCHEMA Example
+ROOT A: a b c a;
+
+TABLE trace_stats {
+	TITLE ("Trace " trace_id);
+TABS 	string event_name, 
+number total_number;
+};
+
+BAR CHART chart_states {
+	TITLE( "Trace " trace_id " chart"); 
+	FROM trace_stats; 
+/* contents of the  bar chart is derived from 
+	the table trace_stats */
+	X_AXIS event_name;
+};
+
+GRAPH event_counters { };
+/* This graph container is used as an associative array 
+	data structure to accumulate event count 
+    for each event in the trace via node attributes */ 
+ATTRIBUTES {number count;};
+
+/* Collect event data and store it in the graph container */
+WITHIN event_counters{
+	COORDINATE $e: $$EVENT 	/* loop over all events within the trace */
+		DO 	Node$a: LAST ($e); 
+			Node$a.count +:=1; /* increment node’s attribute value */
+  		OD;
+	/* Second loop - now fill the table, see loop_over_graph (105) */ 
+	FOR Node$n /* variable Node$n is traversing event_counters node set */
+		DO	
+			trace_stats <| /* store tuple in the table trace_stats */
+				event_name :	SAY(Node$n), 
+					/* here (Node$n) is a string_constructor(87) 
+						converting node’s name (label) into a character string   */ 
+				total_number: 	 Node$n.count 		; 		 			
+		OD;
+}; /* end WITHIN */
+
+SHOW trace_stats;
+SHOW chart_states;
+/* contents of the related table provides data source for the bar chart */
+
+
+
+
-- 
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