问定义窗口以查找多个坡度

EN

% generate a signal
x=1:400;
y = x.^2;
nSamples = length(y);

% define number of segments and window size
N = 8;      
Winsize = ceil(nSamples/N);

% preallocate the vector of slopes and compute the slopes
slopes = zeros(1,N);
for ii=1:N
    slopes(ii) = (y(min(nSamples,Winsize*ii))-y(1+Winsize*(ii-1)))/(x(min(nSamples,Winsize*ii))-x(1+Winsize*(ii-1)));
end

% take the average slope value
Averageslope = mean(slopes);

% generate a signal
x=1:400;
y = x.^2;
slope = mean(diff(y)/diff(x));