2018-11-16 10:27:49 -0600 received badge ● Famous Question (source) 2017-06-08 15:41:39 -0600 commented question Symbolic algebra: Sage, Maxima, Ginac, Sympy? See: SymPy vs. Sage (from the SymPy GitHub Wiki). 2017-05-19 20:41:38 -0600 received badge ● Famous Question (source) 2017-03-13 10:07:37 -0600 received badge ● Notable Question (source) 2017-03-13 10:07:37 -0600 received badge ● Popular Question (source) 2017-03-09 18:11:06 -0600 received badge ● Good Question (source) 2017-03-07 14:18:14 -0600 received badge ● Nice Question (source) 2017-03-06 12:27:37 -0600 asked a question Symmetry-finding On pp. 152-3 of Hydon's Symmetry Methods for Differential Equations (2000 ed.), he lists some computer packages for symmetry-finding. This related Mathematica StackExchange question mentions the SYM Mathematica package and Maple's DEtools/symgen. Does SAGE have anything similar for doing symmetry-finding? 2017-03-04 08:48:49 -0600 commented answer Error installing package mpir-2.4.0.p6 I'm getting this issue with the Sage 7.5.1 release. 2017-03-04 08:48:19 -0600 commented answer Error installing package mpir-2.4.0.p6 Unfortunately that didn't work for me. 2016-08-31 19:55:22 -0600 received badge ● Notable Question (source) 2016-07-16 13:56:35 -0600 received badge ● Notable Question (source) 2016-07-16 13:56:35 -0600 received badge ● Popular Question (source) 2016-04-23 15:15:44 -0600 received badge ● Good Question (source) 2016-02-03 14:03:33 -0600 received badge ● Popular Question (source) 2015-03-26 22:10:00 -0600 marked best answer How do I deal with large, hex numbers in Sage? How do I deal with large, hex numbers in Sage (say ones with 256 or 512 bytes)? How would I import them from a CSV file? (cf. this related answer) 2015-03-18 03:48:09 -0600 received badge ● Nice Question (source) 2015-03-18 01:44:39 -0600 commented answer implementing Lie-admissible algebras What about the comments here? Are those options good, too? 2015-03-18 01:07:19 -0600 received badge ● Commentator 2015-03-18 01:07:19 -0600 commented answer implementing Lie-admissible algebras This is what I expected for an answer. I'm not looking for how to do every detail of such an implementation, but where to start. Thus, you've answered my question. thank you 2015-03-17 13:38:39 -0600 asked a question implementing Lie-admissible algebras How would I implement Lie-admissible algebras in Sage? A Lie-admissible algebra is "A (non-associative) algebra (cf. Non-associative rings and algebras) whose commutator algebra becomes a Lie algebra." Read more. Lie-admissible algebras are classified as 17D25 on MSC2010. 2015-03-17 12:00:59 -0600 commented answer performing a higher resolution FFT Oh, yes, using a windowing function is a good idea. thanks 2015-03-17 12:00:13 -0600 commented answer single PDF of Sage Reference manual? Just ignore it. It's a self-signed cert because I'm too cheap to buy a CA-issued one… 2015-03-17 01:13:22 -0600 asked a question performing a higher resolution FFT How do I interpolate (up-sample) a discrete function so that I can perform a more refined FFT spectral analysis on it? (Note: By default, NumPy's FFT command produces a list of the same dimension as the input list.) thanks 2015-03-15 07:10:40 -0600 received badge ● Self-Learner (source) 2015-03-13 20:10:57 -0600 answered a question List Density Plot? They key is to use hist2d: import matplotlib as mpl import matplotlib.pyplot as plt px,py = x,y nx = ny = 100 #number of bins in x,y directions x_bins = np.linspace(px.min(), px.max(), nx+1) y_bins = np.linspace(py.min(), py.max(), ny+1) plt.xlabel('Nonce'); plt.ylabel('Hash ($\log_{10}$)'); plt.title(r'2-D Histogram of First '+str(len(x))+' Valid Nonces and Hashes'); plt.hist2d(px, py, [x_bins,y_bins], norm=mpl.colors.LogNorm()); plt.savefig('Density Plot (log colorscale).png') plt.close();  This produces a nice plot: 2015-03-13 20:05:00 -0600 commented answer List Density Plot? Actually, hist2d is what I was looking for. 2015-03-13 14:33:09 -0600 commented answer List Density Plot? Actually, I want to do this for discrete values, not functions, so a need to use histogram2d, as here. 2015-03-11 11:46:02 -0600 commented question Displaying a numpy plot I'm using Sage with KDE Cantor on Linux. 2015-03-09 20:31:13 -0600 commented answer How do I deal with large, hex numbers in Sage? Here's what I did, and it works very well: import csv  mylist=[]  with open('~/Downloads/datasmall.txt', 'rb') as csvfile:  data = csv.reader(csvfile)  for row in data:  mylist.append([int(row[1]),float.fromhex(row[2])])  2015-03-09 20:07:12 -0600 edited question List Density Plot? How can I make a 2-D density plot of a list of values in Sage? I'd like to make something like this: (image source) 2015-03-09 19:42:05 -0600 commented answer List Density Plot? I'm dealing with over 300,000 points, and p = Graphics()  for n in range(len(mylist)):  p += point((mylist[n][0], mylist[n][1]),color=hue(n/len(mylist)))  is somewhat slow… Any tips to speed this up? thanks 2015-03-09 19:19:33 -0600 commented answer List Density Plot? I just discovered the hue() function! That's exactly what I need! (I suppose I don't want to do a density plot as much a 3-D plot on a 2-D surface, where the third dimension is the color of the point.) 2015-03-09 19:17:29 -0600 commented answer List Density Plot? I would like to color-code each point based upon a z-value. 2015-03-09 18:45:42 -0600 edited question Displaying a numpy plot import matplotlib import numpy as np  import matplotlib.pyplot as plt    plt.figure(figsize=(6, 3))  plt.plot(x, y) plt.show()  Why doesn't plt.show() display my plot? plt.savefig('myplot.png') works, however. thanks