1 files changed, 15 insertions, 0 deletions
diff --git a/pkg/plot/format.go b/pkg/plot/format.go
new file mode 100644
index 0000000..f1175dd
--- /dev/null
+++ b/pkg/plot/format.go
@@ -0,0 +1,15 @@
+package plot
+
+import "strconv"
+
+const maxDigits = 7
+
+// Ff formats a float
+func Ff(x float64) []rune {
+	minExact := strconv.FormatFloat(x, 'g', -1, 64)
+	fixed := strconv.FormatFloat(x, 'g', maxDigits, 64)
+	if len(minExact) < len(fixed) {
+		return []rune(minExact)
+	}
+	return []rune(fixed)
+}