better readme

README.md

@@ -44,7 +44,13 @@ img := charts.NewHeatmap(charts.HeatmapConfig{
 
 Example script,
 ```
-$ go build; ./calendarheatmap -h
+$ go build
+
+$ ./calendarheatmap -input testdata/basic.json -output basicjson.png
+
+$ ./calendarheatmap -input testdata/custom.txt -output custom.png -input-format row-day-seconds-count
+
+$ ./calendarheatmap -h
 
 Usage of ./calendarheatmap:
   -colorscale string
@@ -52,7 +58,7 @@ Usage of ./calendarheatmap:
   -input string
         file should contain lines in format: 2020-05-16 20:43 PPPP (default "input.txt")
   -intput-format /parsers
-        format of input file (json-basic) refer to /parsers for examples (default "row-day-seconds-count")
+        format of input file refer to /parsers for examples (default "json-basic")
   -labels
         labels for weekday and months (default true)
   -monthsep

main.go

@@ -25,7 +25,7 @@ func main() {
 	colorScale := flag.String("colorscale", "PuBu9", "refer to colorscales for examples")
 	labels := flag.Bool("labels", true, "labels for weekday and months")
 	outputFormat := flag.String("output-format", "png", "output format (png, jpeg, gif)")
-	inputFormat := flag.String("intput-format", "row-day-seconds-count", "format of input file (json-basic) refer to `/parsers` for examples")
+	inputFormat := flag.String("input-format", "json-basic", "format of input file refer to `/parsers` for examples")
 	flag.Parse()
 
 	data, err := ioutil.ReadFile(*filenameInput)

testdata/basic.json

@@ -0,0 +1,8 @@
+{
+    "2020-01-01": 1,
+    "2020-01-02": 2,
+    "2020-01-03": 3,
+    "2020-01-04": 4,
+    "2020-01-05": 5,
+    "2020-01-06": 6
+}