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Solving a non-linear equation [message #88241]

Wed, 02 April 2014 07:33

Reetsspacey
Messages: 3
Registered: June 2009

Junior Member

Hi,

My problem is this: I have a non-linear equation, of the form y = exp(x)+x. I have a large matrix of Y values, and for each cell (Y-value) I would like to calculate a best-fit X. How can I do this???

I have tried defining a function (exp(x)+x), which I could then get the root of by a number of methods. However I would need to first subtract my Y, before I found the root. The problem then becomes, how can I tell IDL to find the root of exp(x)+x-Y, for a range of Y values?

Eeek my brain!

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[Message index]

		Solving a non-linear equation By: Reetsspacey on Wed, 02 April 2014 07:33
		Re: Solving a non-linear equation By: Craig Markwardt on Wed, 02 April 2014 08:36
		Re: Solving a non-linear equation By: Reetsspacey on Wed, 02 April 2014 10:45

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