MATLAB分段函数x=-5:0.1:5; if x>=1 y=3*x.^2+1; elseif -1_其他解答

x=-5:0.1:5;
if x>=1
y=3*x.^2+1;
else if -1不对啊，你运行试过了没?结果不正确clc,clear all x=-5:0.1:5; if x>=1y=3*x.^2+1; else if -1=1y=3*x.^2+1; else if -1