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2012-05-27 20:36:57 -0500 | asked a question | Variable not found Hi, why does this snippet produces "variable 'a' not found"? I looked all over and I just can't figure it out. |

2012-05-27 20:35:36 -0500 | marked best answer | How to decrease the iteration step from 1 to 0.1? Here's one approach, which works by giving Sage enough values that it can guess what step you want: |

2012-05-27 13:43:01 -0500 | asked a question | How to decrease the iteration step from 1 to 0.1? I would like 'a' to be iterated by the step 0.1, and not 1. How can I achieve this? |

2012-05-26 04:51:13 -0500 | asked a question | Given a direction vector and a point, how to draw a 3d line? I have a point and a direction vector How would I draw a 3d line based upon these 2 arguments? I looked over at the documentation but I couldnt find it. |

2012-05-21 06:56:19 -0500 | asked a question | Let user move a frenet trihedron along a curve? How to "animate" a frenet trihedron along a given curve? I believe this is similar to what I'm looking for: http://www.math.byu.edu/~math302/cont... but in the context of curves, because my task is to draw this curve: and give the user ability to move a frenet trihedron along that curve (using a parameter and @interact) I know how to draw a curve and basics of interact: But I don't have enough knowledge about frenet trihedron. If anyone could help me out I would appreciate it. |

2012-04-07 06:18:22 -0500 | marked best answer | How to orthogonaly project a 3d plot to coordinate planes? Is this what you mean? We can just "slice" the vector here to get the coordinate pieces. Naturally, orthogonal projection to some |

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2012-04-06 05:54:47 -0500 | asked a question | How to orthogonaly project a 3d plot to coordinate planes? Hi, I created a 3d plot with I looked over at google for some projection() functions but I didn't find much. Basically what I need to do is orthogonally project that plot onto coordinate planes (x, y, z). If anyone has any idea or an approximate algorithm, that would be nice. Edit: is it possible that this is an orthogonal projection to coordinate planes? I'm showing 3 plots, first has z = 0, second has x = 0 and third has y = 0. |

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