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interp1 - bug
From: |
Roberto Abuter |
Subject: |
interp1 - bug |
Date: |
Sat, 12 Sep 2009 13:07:18 +0200 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) |
Hi :
I am using the most basic form of interp1 in both matlab and octave.
To my surprise interp1 in octave (3.0.2) is producing some very
strange results on my data.
I have a set of two vectors X, Y where X has a sawtooth shape (4
repetitions) and Y has 4 repetitions of an increasing/decreasing
amplitude sine wave.
to start very simple I just check the interp1 engine by making :
XI = X;
YI = interp1(X,Y,XI)
to my surprise, the result YI comes out not identical to Y .
well, if I try to interp1 with XI as my target grid ( a regular one
) I get absolutely wierd results.
hope someone can give me a hint.
many thanks in advance,
Roberto Abuter
VLTI project-
E.S.O ( Europeam Southern Observatory)
- interp1 - bug,
Roberto Abuter <=