作业帮matlab中数值带入问题matlab中矩阵A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1];A为4X4矩阵,用subs函数 subs(A,a,30*pi/180)为什么得到的结果还是A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*s
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![matlab中数值带入问题matlab中矩阵A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1];A为4X4矩阵,用subs函数 subs(A,a,30*pi/180)为什么得到的结果还是A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*s](/uploads/image/z/10252982-38-2.jpg?t=matlab%E4%B8%AD%E6%95%B0%E5%80%BC%E5%B8%A6%E5%85%A5%E9%97%AE%E9%A2%98matlab%E4%B8%AD%E7%9F%A9%E9%98%B5A%3D%5Bcos%28a%29+-sin%28a%29+0+1700%2Acos%28a%29%3Bsin%28a%29+cos%28a%29+0+1700%2Asin%28a%29%3B0+0+1+0%3B0+0+0+1%5D%3BA%E4%B8%BA4X4%E7%9F%A9%E9%98%B5%2C%E7%94%A8subs%E5%87%BD%E6%95%B0+subs%28A%2Ca%2C30%2Api%2F180%29%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BE%97%E5%88%B0%E7%9A%84%E7%BB%93%E6%9E%9C%E8%BF%98%E6%98%AFA%3D%5Bcos%28a%29+-sin%28a%29+0+1700%2Acos%28a%29%3Bsin%28a%29+cos%28a%29+0+1700%2As)
matlab中数值带入问题matlab中矩阵A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1];A为4X4矩阵,用subs函数 subs(A,a,30*pi/180)为什么得到的结果还是A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*s
matlab中数值带入问题
matlab中矩阵A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1];
A为4X4矩阵,用subs函数 subs(A,a,30*pi/180)为什么得到的结果还是A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1]
可是换一个矩阵 B=[x1,x2,x3;2*x1,x2^2,x3]； subs(B,x1,1),就可以将x1=1带入B中.
matlab中数值带入问题matlab中矩阵A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*sin(a);0 0 1 0;0 0 0 1];A为4X4矩阵,用subs函数 subs(A,a,30*pi/180)为什么得到的结果还是A=[cos(a) -sin(a) 0 1700*cos(a);sin(a) cos(a) 0 1700*s
syms a
A=[sin(a) cos(a)]
subs(A,a,2)
A =
[ sin(a), cos(a)]
ans =
0.9093 -0.4161