2020-03-01 08:36:16 +0200 | asked a question | implicit_plot leaves out points I'm trying to use Clearly, this function is 0 at all points where N=0, but the graph only shows them up to P=3/2. Is there anything I can do to avoid this or is it a bug in |

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2017-01-01 22:32:36 +0200 | commented answer | Using desolve_odeint with external stimulus Thanks. Is there a way to incorporate something like a square wave into an ODE in Sage without using Python functions? |

2016-12-31 22:54:09 +0200 | asked a question | Using desolve_odeint with external stimulus I'm trying to numerically solve a two-variable system of differential equations with a periodic external driver (square wave). Right now, the code I have is: This gives |

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2015-09-03 19:45:28 +0200 | answered a question | Finding solutions as numerical values rather than equations I would use: The .rhs() method extracts the right-hand side of an equation. |

2015-09-03 08:39:03 +0200 | commented question | Code disappears in notebook Is it whole cells that disappear or pieces of code within cells? |

2015-09-03 07:57:06 +0200 | asked a question | SageMathCloud Clickable Interact Doesn't Work I'm trying to run the sample clickable interact given by William Stein at http://permalink.gmane.org/gmane.comp..., but nothing happens when I click on the image. The code is Also, what is |

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2014-12-24 21:42:00 +0200 | asked a question | Interacts not working in IPython notebook I'm running Sage 6.4.1 (on Ubuntu 14.04 and Firefox 34.0) and using the IPython notebook. It's a great interface, but interactives aren't working. For example, the following brings up a bunch of HTML rather than an actual interactive. Do interactives work differently in the IPython notebook? |

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2014-06-29 03:15:52 +0200 | marked best answer | Strange type error in interactive I'm trying to make a simple interactive for my students to practice differentiating polynomials. For some reason, when an answer is entered, Sage tries to convert it (a polynomial) to an instance of sage.structure.parent.Parent and chokes. The same code run outside of an interactive works fine. Why is Sage trying to do this conversion and how do I get it to stop? |

2014-06-29 03:15:37 +0200 | marked best answer | Can't Install R Packages in Sage I'm running Sage 5.8 on Ubuntu 12.10 and am trying to install some R packages within Sage. However, when I enter I get a green line and nothing happens. I am not asked what repository I'd like to use; when I specified a repository, I still got a green line and nothing happened. If I leave out the package name, I get a pop-up asking what package I want to install but nothing after that. What should I do? |

2014-06-29 03:12:49 +0200 | marked best answer | Plotting Grid Graph I'm trying to plot a grid graph, specifying exactly where vertices should be plotted. (I want the plot to look like an actual grid and later overlay a graphics object on it.) The following code gives a KeyError: How can I get my plot to look like a regular grid? |

2014-06-29 03:12:48 +0200 | marked best answer | Using layout option with auto_update=false I'm writing an interactive and want the two pull-down menus and the update button to all appear in one row. |

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2014-05-05 14:18:30 +0200 | edited question | Linear Transformation Matrix is Transposed I define a linear transformation object using the following syntax: The output includes the matrix [[2, 5], [3,-1]] instead of [[2,3], [5,-1]]. Is this a bug or am I doing something wrong? EDIT: Specifying side="right" doesn't help. |

2014-05-05 14:17:17 +0200 | commented answer | Linear Transformation Matrix is Transposed Tried that. It doesn't work. |

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