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Re: Calculate gradient [message #70165 is a reply to message #70086]

Sun, 14 March 2010 10:16

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article
<32fa95d5-4856-4847-9f28-cfcac9ad4348@t20g2000yqe.googlegroups.com>,
mslarkin <enhlwang@gmail.com> wrote:

> Hi IDL experts,
> I have a 2-D array (2708x4060), containing reflectance data. Is it
> possible to calculate the reflectance gradient (i.e. the rate of
> reflectance change over distance or array grid) throughout the array,
> and then draw lines of equal gradient (note that they�re NOT contour
> lines)?
> Thank you very much for your help!
> IDL beginner

You need to be clearer. The gradient is a vector quantity. Do
you want to plot isopleths of the magnitude of the gradient?

Ken Bowman

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[Message index]

		Calculate gradient By: mslarkin on Fri, 12 March 2010 13:41
		Re: Calculate gradient By: Kenneth P. Bowman on Sun, 14 March 2010 10:16

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