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Task/Text-processing-1/Lua/text-processing-1.lua

@@ -0,0 +1,49 @@
+filename = "readings.txt"
+io.input( filename )
+
+file_sum, file_cnt_data, file_lines = 0, 0, 0
+max_rejected, n_rejected = 0, 0
+max_rejected_date, rejected_date = "", ""
+
+while true do
+    data = io.read("*line")
+    if data == nil then break end
+
+    date = string.match( data, "%d+%-%d+%-%d+" )
+    if date == nil then break end
+	
+    val = {}
+    for w in string.gmatch( data, "%s%-*%d+[%.%d]*" ) do
+        val[#val+1] = tonumber(w)
+    end
+
+    sum, cnt = 0, 0
+    for i = 1, #val, 2 do
+    	if val[i+1] > 0 then
+    	    sum = sum + val[i]
+    	    cnt = cnt + 1
+    	    n_rejected = 0
+    	else
+	    if n_rejected == 0 then
+	        rejected_date = date
+  	    end
+    	    n_rejected = n_rejected + 1
+    	    if n_rejected > max_rejected then
+    	        max_rejected = n_rejected
+    	        max_rejected_date = rejected_date
+    	    end
+    	end
+    end
+
+    file_sum = file_sum + sum
+    file_cnt_data = file_cnt_data + cnt
+    file_lines = file_lines + 1
+
+    print( string.format( "%s:\tRejected: %d\tAccepted: %d\tLine_total: %f\tLine_average: %f", date, #val/2-cnt, cnt, sum, sum/cnt ) )
+end
+
+print( string.format( "\nFile:\t  %s", filename ) )
+print( string.format( "Total:\t  %f", file_sum ) )
+print( string.format( "Readings: %d", file_lines ) )
+print( string.format( "Average:  %f", file_sum/file_cnt_data ) )
+print( string.format( "Maximum %d consecutive false readings starting at %s.", max_rejected, max_rejected_date ) )