Hello,
I understand you have some irregularly spaced data, and you are trying for some fitting within a ±3 points, a 7-element window to represent the gradient in a better way.
As a workaround you can try using “smoothdata” function.
Please refer to the following example code which uses “smoothdata” with some sample data and sample method.
x = 1:100;
A = cos(2*pi*0.05*x+2*pi*rand) + 0.5*randn(1,100);
% using movmean method in a window of 7 elements
C = smoothdata(A,"movmean",7);
plot(x,C)
Please refer to this MathWorks documentation links to know more about
