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2014-06-28 20:15:23 -0500 | marked best answer | showing an external image in sage notbook Is there an easy way to show an image stored in local drive (or a website) in sage notebook? The only way I know is using matplotlib: but, it is a roundabout way and shows the unecessary black border around the image. |

2014-06-28 20:15:17 -0500 | marked best answer | Forming a solid from a set of intersecting planes suppose I have equations of planes in 3D space in the form: $A_ix + B_iy + C_iz = D_i$ for some values of i
planes at x = -1, 1 in yz plane; planes at y = -1, 1 in xz plane and planes at z = -1, 1 in xy plane intersect and form a unit cube centred at the origin. ty ndomes! But, its taking very long. I have like 12 or more equations (seen a maximum of 30 but can be more). I am now thinking of a different approach. We can easily make a function: so, now is there a good function in sagemath that can show all the region in space for which f(point) gives 1. (yea, its okay if the solids are filled as long as they're transparent enough. . Naively Taking lots of points and finding this solid(Like monte carlo) is very inefficient Actually the program is taking very long time for these equations. so, check it once. Thanks! |

2014-06-28 20:15:17 -0500 | marked best answer | sage stopped working suddenly I didn't do anything to the sage install.(I have upgraded by system yesterday) And suddenly today sage stopped working and this is being displayed. I am using arch linux x86_64 running sage 5.0.1(manually compiled). How can I get it working again? THis is the output of sage -gdb: |

2014-06-28 20:15:00 -0500 | marked best answer | fitting a curve to a straight line How can I use sage to fit some points like x = [1, 3, 4...] y = [1.2, 4.5, 3.6, ...] to a straight line using method of least squares And make a plot of the points and the line? |

2014-06-28 20:14:58 -0500 | marked best answer | question about plotting points and calculating the average slope I have a list points to plot like: X = [3.2467532467532467, 3.236245954692557, 3.215434083601286, 3.1746031746031744, 3.125, 3.0864197530864197, 3.048780487804878, 3.003003003003003, 2.9239766081871346, 2.840909090909091, 2.8011204481792715, 2.7624309392265194, 2.73224043715847, 2.680965147453083, 2.6525198938992043] Y = [1.449645784571558, 1.4733737963401687, 1.4065612375015262, 1.7345137207779688, 1.8754959195583569, 2.1035354414847736, 2.1388130187811201, 2.3224700713378144, 2.6092616151384149, 2.9660818973522378, 3.1351199784336701, 3.2953129727168911, 3.4245247041968971, 3.5986044560957482, 3.7007780808250552] how can I plot X and Y? plot(Y, X) returns ValueError: too many values to unpack And I must also find the average slope. how to find that? |

2014-06-28 20:14:55 -0500 | marked best answer | Finding complex roots numerically using sage Can sage find complex roots numerically for equations like cos(cos(cos(cos(x)))) == sin(sin(sin(sin(x)))) if so, how? |

2014-06-28 20:14:55 -0500 | marked best answer | How to make typeset output in sage display properly? When there are complicated equations , especially with a lot of fractions, the output in sage is bad. Some of it is cut(some lower portion of the output). For example: How can I fix this? |

2014-06-28 20:14:55 -0500 | marked best answer | sage 4.7 does not build and run in new ubuntu 11 amd64 install! Hi! I had to format my computer and reinstall ubuntu 11.04 but when I reinstalled, and tried to build sage, it shows errors and when I try to click on sage, a terminal window opens for fraction of a second and closes. after that nothing happens. I can't attach install.log, so I pasted it into internet clipboard. link text and this is written in dochtml.log and a new empty file is created with name '?@@@8 (invalid encoding)' here are the first lines from install.log: please help! |

2014-06-28 20:14:52 -0500 | marked best answer | Finding all the roots at once numerically I want to calculate the roots of equations like tanh(ax) = x numerically. But the problem is sage gives option of finding just one root provided I give it the interval where the root may be found. But sometimes the interval is not so obvious and I need to know all the numerical roots at once (If the number of roots are finite that is). Is There a way to do that? |

2014-06-28 20:14:51 -0500 | marked best answer | converting expressions into latex code latex( (lim((sin(tan(x))-tan(sin(x)))/x^7,x=0))) returns the latex code of the answer ie -1/30 but I want the latex code of the limit unevaluated so that I can generate an image of the question from it. How can I do this? |

2014-06-28 20:14:51 -0500 | marked best answer | creating a fourier series animation Hello,
I want to create an animation of sum((-1)^(n-1) and show that as the number of terms 'k' in the partial sums increase, the sum converges to x/2 i.e looks more and more like the graph of x/2. My first try is
But that returns me an error
Also I want to include a static graph of x/2 in the background of the animation so that it is easy to observe that the series converges to x/2. how to do this? |

2014-06-28 20:14:49 -0500 | marked best answer | I'm unable to start notebook in ubuntu 10.10 amd64 I have just managed to install ubuntu and then sage a few days ago. Therefore I am an absolute beginner. When I was using sage, due to external power issues, the computer suddenly switched off and after that, I am unable to open sage notebook. Its showing an error. |

2014-06-28 20:12:47 -0500 | marked best answer | Strange problem with double integrals I need to calculate a double of integral a large expression numerically. But, I found a strange error. The code: works. but doesn't work What is going on? And how can I fix this? |

2014-06-28 20:12:46 -0500 | marked best answer | 3d contour plotting in sage It seems there isn't a function in sagemath which can plot contours of a function $f(x, y, z)$ as transparent layers in 3d space like in mayavi. Is there an alternate way to achieve the same effect in sage? |

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