matlab中如果我想让带变量的常微分方程的某个变系数定义为常数，该怎么写程序？ matlab 如何规定常数,比如求求sin(w*t)的导数时...
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>> y=dsolve('D2y = -a^2*y+x','y(0) = b','Dy(pi/a) = 0')
y =
cos(a*t)*(-x+b*a^2)/a^2+1/a^2*x
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>> syms w t
>> f=sin(w*t)
f =
sin(w*t)
>> f1=diff(f,'t')
f1 =
cos(w*t)*w
>>
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syms y(x)
a = 1;
z = dsolve(a*diff(y,2)+diff(y)==1)
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绛旓細for i=1:5 for j=1:5 s=['Images/',num2str(i),'_',num2str(j)]A=imread(s,'BMP');end end
绛旓細鍒╃敤鏁板瓧杞瓧绗︿覆鍑芥暟num2str锛歠or i=1:100 name=['dat',num2str(i)];save(...);end
绛旓細for i=1:10;s=['handle.edit_',num2str(i)];set(s);end
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