How do I find the max value of a fit to data. I am using:
f=fit(x,y,'poly5')I have tried
p=polyder(f)roots(P)But I get an error
MATLAB: Max value of a fit
fit. max
Related Solutions
Certainly roots() could be used.
t = a(:) .';t(r, end) = 0;t(end-r+1:end) = [];coeff = fliplr( t );sols = roots(coeff);You are not accepting the coefficients from polyfit() - they basically are thrown away. Even if you did do
coefficients = polyfit(climb, calories, 2);you still need to compute the fitted values, like
numFitPoints = 1000; % Enough to make the plot look continuous.
xFit = linspace(min(climb), max(climb), numFitPoints);yFit = polyval(coefficients, xFit);hold on;plot(xFit, yFit, 'r-', 'LineWidth', 2);grid on;See attached demo, which produces the plot below.
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