Re: FrameTick Problem

• To: mathgroup at smc.vnet.net
• Subject: [mg35128] Re: FrameTick Problem
• From: timreh719 at yahoo.com.tw (bryan)
• Date: Tue, 25 Jun 2002 03:42:56 -0400 (EDT)
• References: <af6ijd\$lmn\$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

qualsystems*nospam* at mindspring.com wrote in message news:<af6ijd\$lmn\$1 at smc.vnet.net>...
> Can anyone help with this ?
>
> Here is the FrameTick example from the online help.
>
> Plot[Sin[x], {x, 0, 2  Pi}, Frame -> True,  FrameTicks -> {{0, Pi/2,
> Pi, 3  Pi/2, 2  Pi}, {-1, 0, 1}}]
>
> So far, so good.
>
> Now what if you want to change the y axis FrameTicks so that they
> range from say -2 to 2 instead of -1 to 1. So one would believe that
> the FrameTicks option would  be changed accordingly but the command
> below does not accomplish this.
>
> Plot[Sin[x], {x, 0, 2  Pi}, Frame -> True,  FrameTicks -> {{0, Pi/2,
> Pi, 3  Pi/2, 2  Pi}, {-2, 0, 2}}]
>
> Can someone explain why this does not work and what would ?
>
> Thanks
>
Dear friend:
The reason that you can't change it's y ticks from {-1,0,1} to
{-2,0,2} is that you exceed the range you plot . So , we have to
broaden the plot range if you want to use the ticks {-2,0,2}.    i.e.

Plot[Sin[x], {x, 0, 2 Pi}, Frame -> True,
FrameTicks -> {{0, Pi/2, Pi, 3 Pi/2, 2Pi}, {-2, 0, 2}},
PlotRange -> {-2, 2}]

This is the key to the problem . I hope this helps you.
bryan
sincerely

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