diff --git a/plotter.py b/plotter.py
index 4c7dce3..403c539 100644
--- a/plotter.py
+++ b/plotter.py
@@ -945,6 +945,7 @@ class Plotter(Aggregator, BaseProcessor):
         yunit=None,
         xunit_coeff=1.0,
         yunit_coeff=1.0,
+        ytransform=None,
         xscale="linear",
         yscale="linear",
         fit=None,
@@ -1049,6 +1050,9 @@ class Plotter(Aggregator, BaseProcessor):
         if isinstance(yerr, str):
             yerr = self.save.get_node(yerr).read()
 
+        # Apply transformations on y
+        if ytransform is not None:
+            y = ytransform(y)
         if smooth > 0:
             y = gaussian_filter1d(y, sigma=smooth)
         if run is not None: