Fig. 3

LASSO regression screening for characteristic variables. A The upper horizontal coordinate indicates the number of non-zero coefficients in the model; the vertical coordinate indicates the values of the coefficients; the lower horizontal coordinate indicates the standardized coefficient vectors; the 11 different coloured lines represent the 11 variables, and each curve represents the trajectory of the coefficients of each independent variable. B Vertical coordinates indicate the error of cross-validation (the smaller the vertical axis indicates a better lasso fit), the upper horizontal coordinate indicates the number of variables corresponding to different λ, and the lower horizontal coordinate indicates the parameter corresponding to the left dashed line in the logarithmic plot of the lambda penalty coefficients (lambda. min)