       Re: Plot Axis Unit Conversions

• To: mathgroup at smc.vnet.net
• Subject: [mg98850] Re: Plot Axis Unit Conversions
• From: dh <dh at metrohm.com>
• Date: Mon, 20 Apr 2009 19:07:38 -0400 (EDT)
• References: <gsh17u\$or\$1@smc.vnet.net>

```
Hi,

here is an example where we have 2 x-axes, one from 0..1 the other from

0..Pi:

Plot[Sin[Pi t], {t, 0, 1}, Frame -> True,

FrameTicks -> {{True, True}, {True,

Table[{x, Rationalize[x] Pi}, {x, 0, 1, .2}]}}]

Daniel

unknownowen at gmail.com wrote:

> Hello everyone,

>

> I am working on a notebook involving a flutter analysis of a flat

> plate in a wind tunnel. All of the equations involve metric units, but

> most of the physical measurements of size I have are in inches. In

> order to maintain a consistent system of units, I would like to plot

> the axis units in metric and English units. Specifically, I have a

> plot for the critical flutter speed in units of m/s versus the chord

> length in meters, and I want to overlay an x-axis, possibly on the

> top, that will display the equivalent length in inches (i.e,

> xinches=x*10000/254) without messing up the graph. At the very least,

> I would like to display it in centimeters instead of meters for better

> clarity. I do NOT want to recalculate the function using inches - just

> display the conversion. It would be nice if I could display it in both

> inches and centimeters at the same time.

>

> This is an absolute breeze to do in another system, but I haven't been

> able to find anything specifically dealing with scaling of axes for

> Mathematica. Anyone have any ideas?

>

> Thanks very kindly!

>

```

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