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The plot of x=ln(y) looks just like y=ln(x)

asked 2013-09-01 04:16:45 -0500

bxdin gravatar image

According to the author, x=ln(y) should go through y=1, not x=1, making the plot look similar to a half U on the positive side of the x-axis, instead of a half C, on the the positive side of the y-axis.

var('y')
f=ln(y)
plot(f, (x,-5,5), ymin=-5, ymax= 5, aspect_ratio=1)
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answered 2013-09-01 07:31:16 -0500

calc314 gravatar image

updated 2013-09-01 07:33:56 -0500

With plot, Sage assumes that the input defines the horizontal axis. So, to plot what you want, you'll need to use the implicit_plot command.

var('y')
implicit_plot(x==ln(y),(x,-3,3),(y,0,3))
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Asked: 2013-09-01 04:16:45 -0500

Seen: 256 times

Last updated: Sep 01 '13