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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 2015-10-19
关闭： MATLAB Answer Bot 2021-8-20
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.
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Thorsten
Thorsten 2015-10-19
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.

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回答（2 个）

Image Analyst
Image Analyst 2015-10-19
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 2015-10-19
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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