Re: Integrate is driving me crazy, please help!
- To: mathgroup at smc.vnet.net
- Subject: [mg56215] Re: Integrate is driving me crazy, please help!
- From: Helen Read <hpr at together.net>
- Date: Tue, 19 Apr 2005 04:55:33 -0400 (EDT)
- References: <d3vn1h$jm9$1@smc.vnet.net>
- Reply-to: read at math.uvm.edu
- Sender: owner-wri-mathgroup at wolfram.com
Jim Martin wrote:
> Hello Mathematica Experts:
>
> I am a biomechanist and work mostly in the area of muscle contraction. I
> do a lot of numerical computations using excel, but right now I need an
> analytical solution that represents force as a function of position
> integrated over a shortening amplitude. I downloaded a trial version of
> Mathematica and have tried to obtain a solution for this:
>
> Integrate[(hillb*((f0 + hilla)/(2*pi*f*a*Cos(ArcSin(x/a)) + hillb))) -
> hilla, {x, -a, a}]
The number pi is denoted Pi in Mathematica. Remember that *all* built-in
functions, constants, etc., begin with a capital letter.
And argument(s) of a function are always enclosed within square
brackets. f[x], Sin[x], Log[x], etc.
So what you need is the following.
Integrate[(hillb*((f0 + hilla)/(2*Pi*f*a*Cos[ArcSin[x/a]] + hillb))) -
hilla, {x, -a, a}]
--
Helen Read
University of Vermont