matplotlib
diff --git a/‎lib/matplotlib/ticker.py
Copy file name to clipboardExpand all lines: lib/matplotlib/ticker.py
+4Lines changed: 4 additions & 0 deletions b/‎lib/matplotlib/ticker.py
Copy file name to clipboardExpand all lines: lib/matplotlib/ticker.py
+4Lines changed: 4 additions & 0 deletions
@@ -1330,6 +1330,8 @@ class EngFormatter(Formatter):
 
     # The SI engineering prefixes
     ENG_PREFIXES = {
+        -30: "q",
+        -27: "r",
         -24: "y",
         -21: "z",
         -18: "a",
@@ -1347,6 +1349,8 @@ class EngFormatter(Formatter):
          18: "E",
          21: "Z",
          24: "Y"
+         27: "R"
+         30: "Q"
     }
 
     def __init__(self, unit="", places=None, sep=" ", *, usetex=None,