Vectors must be the same length.

2020 10 25
1 个回答
回答已采纳
更新时间：2020 10 25
10 次查看（30 天）

0 个投票

Recently started learning MatLab, trying to plot a function graph.
{2a+b=1
2a-b=7
I run this code, I get "Vectors must be the same length."
Error in Untitled2 (line 9)
plot(X,Y1,X,Y2);
Code:
A=[2,1;2,-1]
B=[1;7]
d=det(A)
X=inv(A)*B
A*X
X=-2:0.5:2;
Y1=(-2*A+1)/1;
Y2=(-2*A+7)/(-1);
plot(X,Y1,X,Y2);
grid on

请先登录，再回答此问题。

 采纳的回答

Stephan
Stephan 2020-10-25
编辑：Stephan 2020-10-25

0 个投票

You overwrite X:
A=[2,1;2,-1]
B=[1;7]
d=det(A)
X=inv(A)*B
A*X
%X=-2:0.5:2;
Y1=(-2*A+1)/1;
Y2=(-2*A+7)/(-1);
plot(X,Y1,X,Y2);
grid on
To avoid this i commented the overwriting line out, because it is not used in the following code.

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 2-D and 3-D Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by