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If I have many figures, how can I find a slope for each one and compare between thier slope?

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Avan Al-Saffar
Avan Al-Saffar on 19 Oct 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
I need to check which plot is steepest? I used polyfit to fit a curve and find a gradient but I do not know how to compare between figures slope.
  1 Comment
Thorsten
Thorsten on 19 Oct 2015
It is not clear what you want to achieve. Please provide an example in Matlab, showing what you have done so far and what you want to do.

Answers (2)

Image Analyst
Image Analyst on 19 Oct 2015
The gradient is the slope, so you have everything you need. For example if you fit a line
coefficients1 = polyfit(x1, y1, 1);
slope1 = coefficients1(1);
coefficients2 = polyfit(x2, y2, 1);
slope2 = coefficients2(1);
% Now compare
if slope1 > slope2
% Take some action.....
end

Avan Al-Saffar
Avan Al-Saffar on 19 Oct 2015
The attached file is my code.
I've found a curve fit and gradient but I do not know how to decide which figure is steepest, can you help me with this point please?

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