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Re: Problem with supplying custom tick marks
*To*: mathgroup at smc.vnet.net
*Subject*: [mg82922] Re: Problem with supplying custom tick marks
*From*: Thomas E Burton <tburton at brahea.com>
*Date*: Sat, 3 Nov 2007 03:29:38 -0500 (EST)
The help for Ticks in Version 6 (same behavior in v5) says in part
"Tick mark lengths are given as a fraction of the distance across the
whole plot." Hence, the ratio of x-tick lengths to y-tick lengths
will be in proportion to AspectRatio. The x-ticks seem therefore to
be foreshortened by the default aspect ratio of 1/GoldRatio. It is
thus no surprise that your x-ticks looks short. A quick and dirty
correction is
xticks1 = xticks /. {l_Real, 0} :> {l/ar, 0}
Block[{ar = 1/2},
Plot[5*Sin[x], {x, 0, 15}, Frame -> True, FrameTicks -> {xticks1,
Automatic, None, None},
AspectRatio -> ar]
]
which looks good to me at all aspect ratios I tried, above and below
1. Apparently, the default option Automatic adjusts for aspect
ratio. I am surprised that this adjustment is not reflected in the
result of AbsoluteOptions. I am also surprised that the problem you
cite seems to be confined to aspect ratios below 1. To my eye, using
xticks with AspectRatio->3 looks OK. Perhaps it's an optical illusion.
Tom
David Park had written:
> Here are a set of tick specifications for an x axis: ... What
> bothers me is that the x-ticks are so much shorter in the second
> plot (at least they distinctly look that way to me) even though
> they are exactly the same ticks. ...
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