求助,哪里出错了?

jennychung

??? Function 'ge' is not defined for values of class 'sym'.

eight

原帖由 jennychung 于 2007-4-1 16:39 发表
??? Function 'ge' is not defined for values of class 'sym'.

请贴具体代码及完整的错误信息

jennychung

figure('pos',[120,130,300,300],'color','w');
axes('pos',[0.1 0.15 0.8 0.72]);
syms s t
T=2;K=1;rt=4;
T1=sym(num2str(T));K1=sym(num2str(K));
k=2;gs=2;rt=2;et=rt;
for tt=0:0.1:40;
    enlsat=gs*et;
    if enlsat>k,eout=k;
    elseif enlsat<-k,eout=-k;
    else eout=enlsat;
    end
    ee=sym(num2str(eout));
    y1=ilaplace(K*ee/s/(T1*s^2+s+1));
    et=rt-y1;det=diff(et);
    et1=subs(et,tt);det1=subs(det,tt);
    plot(et1,det1);hold on;
end
grid

??? Function 'gt' is not defined for values of class 'sym'.

帮忙看一下

eight

原帖由 jennychung 于 2007-4-1 16:49 发表
figure('pos',,'color','w');
axes('pos',);
syms s t
T=2;K=1;rt=4;
T1=sym(num2str(T));K1=sym(num2str(K));
k=2;gs=2;rt=2;et=rt;
for tt=0:0.1:40;
    enlsat=gs*et;
    if enlsat>k,eout=k;
...

估计是符号变量不能比较，你自己调试一下看哪里用错了