MATLAB: Finding the slope of line

best lineMATLABslopetimevelocity

I have to find slope of best line (acceleration). How can I find it ? I couldn't find any datas about it on the internet.

Best Answer

If you have points: use slope formula:

m = (y2-y1)/(x2-x1) ;

Or, fit a straight line using polyfit

p = polyfit(x,y,1) ;

In the above p will be a 2x1 matrix, which gives slope and y intercept.

Or, if you have image and want coordinates from there slope use:

https://in.mathworks.com/matlabcentral/fileexchange/7173-grabit

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MATLAB: Struggling to add the polynomial line


n = 10 ;
x = 1:n ;
y = rand(size(x)) ;
p = polyfit(x,y,1) ;
yi = polyval(p,x) ; 
figure
hold on
plot(x,y,'*r')
plot(x,yi,'b')
legend('Original Points','Fitted Line')

Best Answer

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MATLAB: Struggling to add the polynomial line

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