散景，套索选择表更新

Question

我希望每个人都做得很好。

我正在尝试开发散景交互，从而选择散点图的一部分将更新表格。

我正在使用 Bokeh 文档中的大量示例代码。我的工作场所正在运行旧版本的 Bokeh (0.12.5)，所以我不得不更改自定义 JS 中的最后一行（从 s2.change.emit() 到 s2.trigger('change)。然后我添加了一些创建数据表的行。

我天真地认为，由于在 Datatable 中采购 's1' 有效，采购 's2' 将允许我将表格链接到套索选择。我什至尝试在 JS 回调中为表格小部件添加一个额外的触发器。

有人知道如何从图表中的套索选择创建表格吗？

代码

提前致谢。

from random import random

from bokeh.layouts import row
from bokeh.models import CustomJS, ColumnDataSource
from bokeh.plotting import figure, output_file, show
from bokeh.models.widgets import DataTable, DateFormatter, TableColumn

output_file("callback.html")

x = [random() for x in range(500)]
y = [random() for y in range(500)]

s1 = ColumnDataSource(data=dict(x=x, y=y))
p1 = figure(plot_width=400, plot_height=400, tools="lasso_select", title="Select Here")
p1.circle('x', 'y', source=s1, alpha=0.6)

s2 = ColumnDataSource(data=dict(x=[], y=[]))
p2 = figure(plot_width=400, plot_height=400, x_range=(0, 1), y_range=(0, 1),
            tools="", title="Watch Here")
p2.circle('x', 'y', source=s2, alpha=0.6)

###New code##
columns = [TableColumn(field ="x",  title = "X axis"),
           TableColumn(field ="y",  title = "Y axis")]

table = DataTable(source =s2, columns = columns, width =400, height =  280)


##Added in table.trigger('change') hoping this would link to the lasso select.
s1.callback = CustomJS(args=dict(s2=s2), code="""
        var inds = cb_obj.selected['1d'].indices;
        var d1 = cb_obj.data;
        var d2 = s2.data;
        d2['x'] = []
        d2['y'] = []
        for (i = 0; i < inds.length; i++) {
            d2['x'].push(d1['x'][inds[i]])
            d2['y'].push(d1['y'][inds[i]])
               }
        s2.trigger('change');
        table.trigger('change');
    """)


##having 'table' in the layout, stops the callback from working, deleting table from the layout makes it work.
layout = row(p1, p2, table)

show(layout)

Answer 1

这是 bokeh 1.0.4 的工作版本

from random import random

import bokeh.io
from bokeh.io import output_notebook, show

from bokeh.layouts import row
from bokeh.models import CustomJS, ColumnDataSource
from bokeh.plotting import figure
from bokeh.models.widgets import DataTable, DateFormatter, TableColumn

from bokeh.resources import INLINE
bokeh.io.output_notebook(INLINE)

x = [random() for x in range(500)]
y = [random() for y in range(500)]

s1 = ColumnDataSource(data=dict(x=x, y=y))
p1 = figure(plot_width=400, plot_height=400, tools="lasso_select", title="Select Here")
p1.circle('x', 'y', source=s1, alpha=0.6)

s2 = ColumnDataSource(data=dict(x=[], y=[]))
p2 = figure(plot_width=400, plot_height=400, x_range=(0, 1), y_range=(0, 1),
            tools="", title="Watch Here")
p2.circle('x', 'y', source=s2, alpha=0.6)

columns = [TableColumn(field ="x",  title = "X axis"),
           TableColumn(field ="y",  title = "Y axis")]

table = DataTable(source =s2, columns = columns, width =155, height = 380)


s1.selected.js_on_change('indices', CustomJS(args=dict(s1=s1, s2=s2, table=table), code="""
        var inds = cb_obj.indices;
        var d1 = s1.data;
        var d2 = s2.data;
        d2['x'] = []
        d2['y'] = []
        for (var i = 0; i < inds.length; i++) {
            d2['x'].push(d1['x'][inds[i]])
            d2['y'].push(d1['y'][inds[i]])
        }
        s2.change.emit();
        table.change.emit();
    """)
)

layout = row(p1, p2, table)

show(layout)

您甚至可以选择表格中的行/值，第二个图中的点会改变不透明度（您可以通过单击标题对表格进行排序）

Answer 2

现在，您的回调不知道“table”是什么。您需要将其作为参数传递给您的 CustomJS 函数：

s1.callback = CustomJS(args=dict(s2=s2, table=table), code="""
    var inds = cb_obj.selected['1d'].indices;
    var d1 = cb_obj.data;
    var d2 = s2.data;
    d2['x'] = []
    d2['y'] = []
    for (i = 0; i < inds.length; i++) {
        d2['x'].push(d1['x'][inds[i]])
        d2['y'].push(d1['y'][inds[i]])
           }
    s2.trigger('change');
    table.trigger('change');
""")