Update numpy-tooltip-images.rst

FutureWarning: DataFrame.applymap has been deprecated. Use DataFrame.map instead.

doc/case_studies/numpy-tooltip-images.rst

@@ -40,7 +40,7 @@ in order to have a quantitative measurement to plot.
         'group': rng.choice(['a', 'b', 'c'], size=n_rows)
     })
     # Compute the area as the proportion of pixels above a threshold
-    df[['image1_area', 'image2_area']] = df[['image1', 'image2']].applymap(lambda x: (x > 0.4).mean())
+    df[['image1_area', 'image2_area']] = df[['image1', 'image2']].map(lambda x: (x > 0.4).mean())
     df
 
 Next, we define the function