文件=“https://in.mathworks.com/matlabcentral/answers/uploaded_files/770221/highstrain.csv”;
T = readtable(文件);
x = T。X;y = T。Y;
%极限强度
[val, idx] = max (y);
xmax = x (idx);ymax = val;
%得到线性部分
阈值= 550;
(TF, Sl, Ic) = ischange (y,“线性”,“阈值”阈值);
idx =找到(TF);
xlinear = x (1: idx (2));
ylinear = y (1: idx (2));
图
持有在
情节(x, y,“r”)
情节(xmax ymax,“* r”)
情节(xlinear ylinear,“* - b”)