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

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.

[Thorsten]

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.

Answer 1

[Image Analyst]

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

Answer 2

[Avan Al-Saffar]

 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?