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2011-08-25 20:52:58 +0100 | marked best answer | ploting problems To plot one quantity vs. another you can build a list of coordinates of points on the graph and then plot those points. Use Which is just a line with slope 2 since $\log(x^2) = 2 \log(x)$. If you want the points to be connected with lines try: |

2011-08-25 14:20:09 +0100 | asked a question | ploting problems I want to do the plot of: log (y) vs log (x), when y = log (x) and x is between (1,150), so I tried: sage: var ('x,y') (x, y) sage: y = function ('y',x) sage: y = x^2 sage: plot (log(y), (log(x), 1,150)) but the final result that I found is wrong (I did the real plot using openoffice and gnuplot), so finally someone could you help me to solve this problem? |

2011-08-25 14:01:58 +0100 | received badge | ● Scholar (source) |

2011-08-25 14:01:58 +0100 | marked best answer | mistake at plot? Your syntax for your function You had a lot of missing Assuming what I've posted is the correct function, the warning message from So you may have the wrong function if you expect to be able to plot it on that interval. |

2011-08-24 17:14:32 +0100 | asked a question | mistake at plot? what is the meaning of: verbose 0 (4075: plot.py, generate_plot_points) WARNING: When plotting, failed to evaluate function at 121 points. verbose 0 (4075: plot.py, generate_plot_points) Last error message: '' when I try to do: |

2011-08-16 00:53:23 +0100 | commented answer | unsolved equation Thank you very much for your kind attention and your suggestions. However I need to find z as a function of t, when t vary 1 - 1000 with step of 10. is it possible to do that? |

2011-08-16 00:42:05 +0100 | received badge | ● Supporter (source) |

2011-08-08 21:37:44 +0100 | commented question | unsolved equation could you tell me,what kind of equation do you think is it?. I found this equation from physical principles of shock wave to describe the temporal evolution of relativistic blastwaves. z is the lorentz factor ( http://en.wikipedia.org/wiki/Lorentz_factor ) and r is the shock radius. Thank you for your comment! |

2011-08-08 12:50:25 +0100 | received badge | ● Editor (source) |

2011-08-08 12:48:57 +0100 | asked a question | unsolved equation Dear sage user, Could you help me to find z = z(t)?, if: with, thanks!! I couldn't solve it!!! |

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