Azzera filtri
Azzera filtri

find an equation for the set of coordinates

1 visualizzazione (ultimi 30 giorni)
Duncan il 12 Ago 2014
Commentato: Image Analyst il 17 Ago 2014
I have the above plot with a different set of coordinates for each object(labeled by different colors). I was wondering if there was a way to find an approximate equation for each object in matlab.
I was thinking about smoothing out the "rougher" parts to make it easier but I'm not sure how to go about doing that. any ideas?

Risposte (2)

Image Analyst
Image Analyst il 12 Ago 2014
How about just taking the average of the coordinates
windowWidth = 5;
newx = conv(x, ones(1, windowWidth)/windowWidth, 'same');
newy = conv(y, ones(1, windowWidth)/windowWidth, 'same');
  4 Commenti
Duncan il 17 Ago 2014
hi sorry, i noticed you put conv() in the e.g. and then said that conv2() is a polyfit of order 1.
Image Analyst
Image Analyst il 17 Ago 2014
Sorry - I usually use conv2(), which is for 2D arrays (images). For a 1-D signal, you'd use conv().

Accedi per commentare.

Ahmet Cecen
Ahmet Cecen il 12 Ago 2014
I would use cftool, easier to play around with different fits, and not confined to polynomials.


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