怎么用R语言建立有序三分类logistic模型答:建立m函数文件存为logistic1 function f=logistic1(b)t=[0,5,10,24,33,48,57,72,96,120,144,168,192,216];y=[0,0.028,0.103,0.336,0.450,0.597,0.716,0.778,0.835,0.849,0.816,0.839,0.811,0.816];f = y-b(1)./(1+b(2).*exp(-b(3).*t));b0=[10,2,2]...