Re: ? edit contours


"John D'Errico" <woodchips@xxxxxxxxxxxxxxxx> wrote in message
news:foj7g5$fqt$1@xxxxxxxxxxxxxxxxxxxxx
"Cheng Cosine" <acosine@xxxxxxxxxx> wrote in message
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Hi:

[c,h] = contour(peaks); clabel(c,h), colorbar

Plots a set of nice looking contours. Clinking

Editor button, I can cut selected contour(s) out.

But I do not how to move a contour or to deform

a selected contour. Specifically, how do I select a

contour and then move the whole selected on to

another position, and how do I show points on that

contour and then move some of slectted points of that

contour to other positions and then re-draw a contour?


Yes indeed. This follows the time honored
approach - when your data fails to show
what you expect, just edit the data. It is
used by many authors when under the
pressure of a deadline, or given a study
where their data simply fails to measure
up. Why bother with fact, when fiction is
so easy to achieve?


Well, indeed that is one perspective; however, there are applications

benefit to human society. For example, objection recognization. Say,

one scans an article as an image and then tries to convert those digits

into charaters or words, or one obtains a CT images and then tries to

identify diffrerent organs or structures. Then one encounters situations

that simply command MatLab to plot contours will not do it. A most

famous reason is that any real-life measurements come with noises.

A naive contour plot will produce wrong characters or some fake organs

or structures. I used MatLab generated function as an example because

sending attach file of real-life images can delay some users' speed on

reading articles; not to mention some users do not like to open any articles

with attachements. Besides, when concept is the same, using example that

any MatLab user has is a more efficient idea.

Anyway, depends on particular users, very likely, any "good" tools could
have

"bad" applications.

by Cheng Cosine
Feb/09/2k8 NC


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