polyfit whats wrong?

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Joao Mendes
Joao Mendes 2020-12-21
评论： Star Strider 2020-12-21
x = [0;0.25;0.5;0.75;1;1.25;1.5;1.75;2;2.25;2.5;2.75;3]
y = [0.652;0.217;0.264;0.0689;-0.183;0.209:0.529;0.689;1.18;1.48;2.21;3.09;3.64;]
p1 = polyfit( x, y, 4)
why isn´t this working?

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回答（1 个）

Star Strider
Star Strider 2020-12-21
‘why isn´t this working?’
It should throw an error telling you exactly what the problem is. When I ran the code you posted, the result was:
Error using polyfit (line 44)
The first two inputs must have the same number of elements.
Here, ‘x’ is a (13x1) vector and ‘y’ is a (12x1) vector.
They have to have the same numbers of elements. It appears that an element is missing from ‘y’.
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Joao Mendes
Joao Mendes 2020-12-21
on my computer it says:
Attempt to execute SCRIPT polyfit as a function:
/MATLAB Drive/polyfit.m
on my friend´s, with exactly the same code it works
Star Strider
Star Strider 2020-12-21
You have a script that you named ‘polyfit’. That’s the problem.
The solution is to change the name of your script to something like ‘mypolyfit’ or something else that makes sense in the context of whatever you’re doing.

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