otw chart pandas to polars

rowers/interactiveplots.py

@@ -996,7 +996,8 @@ def interactive_otwcpchart(powerdf, promember=0, rowername="", r=None,
                            title='', type='water',
                            wcpower=[], wcdurations=[], cpoverlay=False):
 
-    powerdf2 = powerdf[~(powerdf == 0).any(axis=1)].copy()
+    powerdf2 = powerdf.filter(pl.col("Delta") > 0, pl.col("CP") > 0)
+
     # plot tools
     if (promember == 1):  # pragma: no cover
         TOOLS = 'save,pan,box_zoom,wheel_zoom,reset,tap,hover,crosshair'
@@ -1006,11 +1007,9 @@ def interactive_otwcpchart(powerdf, promember=0, rowername="", r=None,
     x_axis_type = 'log'
 
     deltas = powerdf2['Delta'].apply(lambda x: timedeltaconv(x))
-    powerdf2['ftime'] = deltas.apply(lambda x: strfdelta(x))
-    powerdf2['Deltaminutes'] = powerdf2['Delta']/60.
-
-    source = ColumnDataSource(
-        data=powerdf2
+    powerdf2 = powerdf2.with_columns(
+        ftime = deltas.apply(lambda x: strfdelta(x)),
+        Deltaminutes = pl.col("Delta")/60.
     )
 
     # there is no Paul's law for OTW
@@ -1071,7 +1070,7 @@ def interactive_otwcpchart(powerdf, promember=0, rowername="", r=None,
         fitpoweraverage = 0*fitpower
 
 
-    fit_data =  pd.DataFrame(dict(
+    fit_data =  pl.DataFrame(dict(
             CP=fitpower,
             CPmax=ratio*fitpower,
             duration=fitt/60.,
@@ -1085,13 +1084,12 @@ def interactive_otwcpchart(powerdf, promember=0, rowername="", r=None,
             #            url = urls,
         ))
 
-
     if not title:
         title = "Critical Power for "+rowername
     
     chart_dict = {
-        'data': powerdf2.to_dict("records"),
-        'fitdata': fit_data.to_dict("records"),
+        'data': powerdf2.to_dicts(),
+        'fitdata': fit_data.to_dicts(),
         'title': title,
     }