问题描述：
matlab 画图出错 Conversion to double from sym is not possible.
syms x;
y=-2.1813e-005*(x^5)+0.0013202*(x^4)-0.02357*(x^3)+0.086555*(x^2)+0.028076*x+22.711;
dy=diff(y);
x=0:.1;30;
plot(x,dy)
syms x;
y=-2.1813e-005*(x^5)+0.0013202*(x^4)-0.02357*(x^3)+0.086555*(x^2)+0.028076*x+22.711;
dy=diff(y);
x=0:.1;30;
plot(x,dy)
问题解答：
我来补答展开全文阅读