Christopher Davis's profile - activity

Thanks very much for your help! Jeroen's example worked in my sagews

Thanks Jeroen!

Hi! I'm unable to get some of my old code (written in the Sage notebook around 2011) to work on CoCalc. I found very similar code on the SageMath interact/graphics wiki page at

https://wiki.sagemath.org/interact/graphics#Interact_with_matplotlib

That code also doesn't work for me in CoCalc: no image gets displayed, just the two slider bars. Is there a simple change that needs to be made?

In general, should I expect Sage code to work in a CoCalc Sage worksheet? I admit that I don't know to what extent the two are compatible. Thanks for any advice!

Here is the code from that SageMath Wiki:

# Simple example demonstrating how to interact with matplotlib directly.
# Comment plt.clf() to get the plots overlay in each update.
# Gokhan Sever & Harald Schilly (2010-01-24)

from scipy import stats
import numpy as np
import matplotlib.pyplot as plt

@interact
def plot_norm(loc=(0,(0,10)), scale=(1,(1,10))):
    rv = stats.norm(loc, scale)
    x = np.linspace(-10,10,1000)
    plt.plot(x,rv.pdf(x))
    plt.grid(True)
    plt.savefig('plt.png')
    plt.clf()

I'm teaching a cryptology class in the fall. We are meeting in a computer lab with Windows computers, and ideally I would like students to be able to use the Notebook interface in Sage. Does anyone have any advice or suggestions for how I should set this up? (Currently Sage is not installed.) In the past (around 2012), I believe we had a special server set up, and then students connected to that by typing in a special address in their web browsers.

I'm not considering using CoCalc (because even though we could maybe get funding for a few quarters, I don't think that would be sustainable longterm).

I will pass on any advice from you to my university's IT department.

Thanks very much!