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Thread Subject: Get indices for Parametrized Curves

Subject: Get indices for Parametrized Curves

From: Luca Cerone

Date: 25 Apr, 2008 16:04:03

Message: 1 of 2

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Hi,
I have the following problem:
I have a time t=[0:0.01:1]
x=f1(t); y=f2(t); describing a parametric curve.

I plot it with: scatter(x,y)

I would like to know if there is a way to select a
particular segment of this curve clicking on the extremes.

I mean, I click on (x(5),y(5)) as first extreme and on
(x(25),y(25)) as the second extreme, I would like to get two
vectors: x_s=x(5:25) y_s=y(5:25).

Is there a way to do this?
I remember there was a function to obtain values from plots,
but I couldn't remember which one.

Thank you very much in advance!
Best wishes -Luca

Subject: Get indices for Parametrized Curves

From: us

Date: 25 Apr, 2008 16:10:03

Message: 2 of 2

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"Luca Cerone":
<SNIP wants to select his/her points on a graph...

> I remember there was a function to obtain values from
plots, but I couldn't remember which one...

a hint:

help ginput;

us

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reference	us	25 Apr, 2008 12:10:12
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