datashader

问题 I'm trying to change the colormap used by datashader. I tried this: datashade(scatter, cmap='Reds') Where scatter is an hv.Scatter element. This doesn't work because datashader expects an iterable or a function that returns colors. As such, this works: datashade(scatter, cmap=['blue']) So how can I take the 'Reds' colormap and convert it into something datashader can use? Thank you. 回答1: Right; you can't pass the string name of a colormap to Datashader's cmap argument, because Datashader

问题 Is it possible to add a datashader image to a set of matplotlib subplots? As a concrete example, import numpy as np import pandas as pd import matplotlib.pylab as plt import datashader as ds import datashader.transfer_functions as tf from datashader.utils import export_image from functools import partial background = "white" export = partial(export_image, background = background, export_path="export") N = 10000 df = pd.DataFrame(np.random.random((N, 3)), columns = ['x','y', 'z']) f, ax = plt

问题 Let me just start by complementing the HoloViews developers, this thing is pretty amazing. There are just a lot of pieces and it is a bit hard to figure out how to put them all together to do what I want:). I am trying here to do linked multidimensional data plotting, i.e. I want to have several plots showing views of the same data along various dimensions. I want then to harness the Bokeh selection tools to select data in one of the plots, and see where it is in the others. But I also need

问题 I have recently created an interactive Datashader-Bokeh Interactive Map that looks like this NYC Taxi Example on a Jupyter Notebook. The dynamic aggregation works beautifully when I run the code locally on my mac. My question is, is the current technology possible to host this as a web application - e.g. a web app without that Jupyter Notebook interface. And if so, how? I've come across some articles (this and this) that suggest HoloViews might be an appropriate "glue" to stitch up Datashader

问题 I have recently created an interactive Datashader-Bokeh Interactive Map that looks like this NYC Taxi Example on a Jupyter Notebook. The dynamic aggregation works beautifully when I run the code locally on my mac. My question is, is the current technology possible to host this as a web application - e.g. a web app without that Jupyter Notebook interface. And if so, how? I've come across some articles (this and this) that suggest HoloViews might be an appropriate "glue" to stitch up Datashader