Transform data with CDSView

Community Support
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2

Not entirely sure what you mean, but this seems like it.

from bokeh.io import show
from bokeh.layouts import column
from bokeh.models import ColumnDataSource, CDSView, BooleanFilter, CustomJSTransform, MultiSelect, CustomJS
from bokeh.plotting import figure
from bokeh.transform import transform

p = figure()
ds = ColumnDataSource(dict(x=list(range(10)), y=list(range(10))))
p.scatter('x', 'y', source=ds)
b = BooleanFilter(booleans=[x % 2 == 0 for x in ds.data['x']])
view = CDSView(source=ds, filters=[b])
tr = CustomJSTransform(v_func="return xs.map(x => x * x);")
p.scatter('x', transform('y', tr), view=view, source=ds, color='red')

ms = MultiSelect(options=['odd', 'even'], value=['odd', 'even'])

ms.js_on_change('value', CustomJS(args=dict(b=b, ds=ds),
                                  code="""\
                                      const [odd, even] = ['odd', 'even'].map(i => cb_obj.value.includes(i));
                                      let fn;
                                      if (odd && even) fn = (_) => true;
                                      else if (odd)    fn = (x) => x % 2 == 1;
                                      else if (even)   fn = (x) => x % 2 == 0;
                                      else             fn = (_) => false;
                                      b.booleans = ds.data.x.map(fn);
                                      ds.change.emit();
                                  """))

show(column(p, ms))