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From: Andres Klever on 22 Oct 2009 14:11
Hi, for those who know this tool

1) i have a problem with the weight
In order to perform a weighted fit on this data, the vectors y and dy have to be merged into a 2-by-N matrix and given as the second input argument to ezfit. Compare the results for the usual and weighted fits:
fw = ezfit(x, [y;dy], 'exp');
showfit(fw,'fitcolor','red');
f = ezfit(x, y, 'exp');
showfit(f,'fitcolor','blue');
my problem is that when i do this (exactly the same) the data [y;dy] is from a different size than x, so obiously i get this error:

??? Error using ==> ezfit at 272
X and Y dimensions must agree.

if you can help me with this it would be great..

2)the other problem is that when i plot more than one fit for the same data, the plot just shows one legend that is pasted into the other legend, hahaha, so i just can see one of the 2 legends that should appear (showing me the different equations)...

,

thanks very much,
From: Frederic Moisy on 22 Oct 2009 19:11
Problem #1: This occurs if y and dy are column vectors instead of row vectors. If this is the case, then just replace [y; dy] by [y, dy]

Problem #2: Move the equation box using the mouse.

Frederic.

"Andres Klever" <andisoto(a)gmail.com> wrote in message <hbq787$ml2$1(a)fred.mathworks.com>...
> Hi, for those who know this tool
>
> 1) i have a problem with the weight
> In order to perform a weighted fit on this data, the vectors y and dy have to be merged into a 2-by-N matrix and given as the second input argument to ezfit. Compare the results for the usual and weighted fits:
> fw = ezfit(x, [y;dy], 'exp');
> showfit(fw,'fitcolor','red');
> f = ezfit(x, y, 'exp');
> showfit(f,'fitcolor','blue');
> my problem is that when i do this (exactly the same) the data [y;dy] is from a different size than x, so obiously i get this error:
>
> ??? Error using ==> ezfit at 272
> X and Y dimensions must agree.
>
> if you can help me with this it would be great..
>
> 2)the other problem is that when i plot more than one fit for the same data, the plot just shows one legend that is pasted into the other legend, hahaha, so i just can see one of the 2 legends that should appear (showing me the different equations)...
>
> ,
>
> thanks very much,
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