Errors for the slope and intercept

2018 12 3
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更新时间：2018 12 3
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How can I get the uncertainty for the slope and intercept when using this code
Const = polyfit(log10(x),log10(y), 1);
m = Const(1);
k = Const(2);
b_fit = (10^k) * (x.^m4);

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回答（2 个）

Walter Roberson
Walter Roberson 2018-12-3

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use the two output form of polyfit and the two output form of polyval

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Walter Roberson
Walter Roberson 2018-12-3
is the error to be estimated in log10 space or original space ?
Walter Roberson
Walter Roberson 2018-12-3
okay so when you call polyval pass in log10 of the x locations and the second output will reflect that log space .

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Star Strider
Star Strider 2018-12-3

0 个投票

Consider the File Exchange contribution polyparci (link).

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