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?
To plot one quantity vs. another you can build a list of coordinates of points on the graph and then plot those points. Use plot for graphing a function of an independent variable. In your graph, neither axis variable is "independent".
sage: coordinates = [ (log(x), log(x^2)) for x in range(1,150) ]
sage: point( coordinates )
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:
sage: line(coordinates)
Asked: 2011-08-25 14:20:09 +0100
Seen: 739 times
Last updated: Aug 25 '11
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