finish long writing

textgrid/examples/long_output.TextGrid

@@ -0,0 +1,55 @@
+File type = "ooTextFile"
+Object class = "TextGrid"
+
+xmin = 0
+xmax = 2.3510204081632655
+tiers? <exists>
+size = 3
+item []:
+	item [1]:
+		class = "IntervalTier"
+		name = "Mary"
+		xmin = 0
+		xmax = 2.3510204081632655
+		intervals: size = 3
+		intervals [1]:
+			xmin = 0
+			xmax = 0.7427342752056899
+			text = "1_label1"
+		intervals [2]:
+			xmin = 0.7427342752056899
+			xmax = 1.7447703580322245
+			text = "1_label2"
+		intervals [3]:
+			xmin = 1.7447703580322245
+			xmax = 2.3510204081632655
+			text = "1_label3"
+	item [2]:
+		class = "IntervalTier"
+		name = "John"
+		xmin = 0
+		xmax = 2.3510204081632655
+		intervals: size = 2
+		intervals [1]:
+			xmin = 0
+			xmax = 1.2402970197816243
+			text = "2_label1"
+		intervals [2]:
+			xmin = 1.2402970197816243
+			xmax = 2.3510204081632655
+			text = "2_label2"
+	item [3]:
+		class = "TextTier"
+		name = "Bell"
+		xmin = 0
+		xmax = 2.3510204081632655
+		points: size = 3
+		points [0]:
+			number = 0.40238753672840144
+			mark = "point1"
+		points [1]:
+			number = 1.1677357861976339
+			mark = "point2"
+		points [2]:
+			number = 1.8950757704562047
+			mark = "point3"

textgrid/textgrid.go

@@ -274,13 +274,13 @@ func (tg *TextGrid) WriteLong(path string, overwrite ...bool) error {
 
 			for intervalNum, interval := range tier.GetIntervals() {
 				// write interval number
-				_, err = fmt.Fprintf(file, "\t\tintervals [%d]:\n", intervalNum)
+				_, err = fmt.Fprintf(file, "\t\tintervals [%d]:\n", intervalNum+1)
 				if err != nil {
 					return err
 				}
 
 				// xmin and xmax
-				_, err = fmt.Fprintf(file, "\t\t\txmin = %f\n\t\t\txmax = %f\n", tg.xmin, tg.xmax)
+				_, err = fmt.Fprintf(file, "\t\t\txmin = %s\n\t\t\txmax = %s\n", f2s(interval.xmin), f2s(interval.xmax))
 				if err != nil {
 					return err
 				}
@@ -306,7 +306,7 @@ func (tg *TextGrid) WriteLong(path string, overwrite ...bool) error {
 				}
 
 				// value
-				_, err = fmt.Fprintf(file, "\t\t\tnumber = %f\n", point.value)
+				_, err = fmt.Fprintf(file, "\t\t\tnumber = %s\n", f2s(point.value))
 				if err != nil {
 					return err
 				}