摘要
一、数学模型 1.对数线性模型 一个n维列联表可用对数线性模型M来描述(一般采用分层模型):logmθ=u+u_([1][θ_1])+u_([2][θ_2])+…+u_([k][θ_k])+…+u_([l][θ_l]),(1≤k≤l,1≤l≤n), (1)其中θ为下标集,例如在四维情况,θ可为i_1i_2i_3i_4,m_θ为n维列联表中第i_1i_2
N-dimensional contingency tables could be described by the loglinear models. To find themaximum likelihood estimates of the expected frequencies, the likelihood equations are setup according to the minimal sufficient configurations and solved by iterative computation. Fu-rihermore, the 'best' model is found by the stepwise selection procedure presented in thispaper. A medical example is illustrated.
出处
《数值计算与计算机应用》
CSCD
北大核心
1989年第4期242-247,共6页
Journal on Numerical Methods and Computer Applications
