Interactive data selection¶
In order to interact with a given plot, to choose points or regions of interest
of different shapes, plot objects propose two methods :
Most of the available charts provided by Flint provides such interactions.
Get the plot¶
Here is a small example creating a chart based on fixed data.
from bliss.common.plot import * import numpy xx = numpy.linspace(0, 4*3.14, 50) yy = numpy.cos(xx) p = plot(yy, name="Plot 0")
p refers to a plot in Flint and provides it’s own method to interact with.
Once that the plot
p object is created (an
CurvePlot in this case), several
options are available to interact with the plot:
'rectangle': rectangle selection
'line': line selection
'hline': horizontal line selection
'vline': vertical line selection
'polygon': polygon selection
When selecting a
polygon shape, click on the starting point of the
polygon to close it (the polygon) and to return to BLISS shell.
Select a rectangle¶
rectangle = p.select_shape("rectangle")
BLISS shell is blocked until user makes a rectangular selection.
Once the rectangle is created, the interaction is terminated, and the result is passed to the BLISS shell.
rectangle Out : [[278.25146, 716.00623], [623.90546, 401.82913]]
Select a list of points¶
select_points method allows the user to select a given number of point
on the corresponding plot using their mouse.
a, b, c = p.select_points(3) # Blocks until the user selects the 3 points a [1.2, 3.4]
Other selection kind¶
topleft, bottomright = p.select_shape('rectangle') start, stop = p.select_shape('line') left, right = p.select_shape('hline') bottom, top = p.select_shape('vline') points = p.select_shape('polygon')