matlab问题：plot Conversion to double from sym is not possible,

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/05/15 08:19:33

matlab问题：plot Conversion to double from sym is not possible,
这是我的代码,
x=0:1:11;
y=dsolve('Dy-0.08*y=0','y(0)=80423','x');
subplot(2,2,1);
ezplot(y,[0,30]);
subplot(2,2,2);
z=double(x)
plot(z,y)
为什么用plot就出现上述问题啊,是不是我的数据类型不对,

y =

80423*exp((2*x)/25)
y还是表达式.肯定不能直接plot
再问：求怎么解决，为什么下面可以啊 x=-pi:0.1:pi; y=sin(x); plot(x,y) 这个y也是表达式啊，跪求大侠解决
再答：这个y不是表达式是矩阵了。。。。。。。。。。。上面的那个y是关于x 的表达是你要画图科曼多得把x带进去把y算出来 subs函数 subs(S)表示：用数值替代所有的符号变量。

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