"index exceeds matrix dimensions" using simulink
显示 更早的评论
the following code is in regards to rotational sytem with three storing elements using simulink to plot for angular velocities an torque. after y_out(:,1) however, it keeps showing that the index exceeds matrix dimensions. Any help? simulink file is attached
clc
clear all
m1=1;
m2=3; %this is the mass in kg
k=330;
r1=.03;
r2=.1;
b=.2;
J1=.5*m1*r2^2;
J2 = J1;
N=r2/r1;
A = [0 1 -1 ;-k/J1 0 0; k/J2 0 -b/J2];
B = [0 ; N/J1 ;0];
C=[0 0 1];
D=[0]';
x0= [0]';
tf=30;
t1 = [0:0.01:tf];
%t1 = [0:0.01:1]
F = 10 ;
u=F*ones(size(t1));
%u=F*cos(t1)
sim('HW2_SimLink')
cart_po = y_out(:,1);
cart_vel = y_out(:,2);
cart_po1 = y_out(:,3);
cart_vel1 = y_out(:,4);
figure(1)
plot(t1,cart_po,'-b','linewidth',1.5)
xlabel('Time (seconds)','fontsize',14)
ylabel('Position m1 (m)','fontsize',14)
grid,
figure(2)
plot(t1,cart_vel,'-r','linewidth',1.5);
%legend('Position','Velocity')
xlabel('Time (seconds)','fontsize',14)
ylabel('Velocity m1 (m/s)','fontsize',14)
grid, hold
figure(3)
plot(t1,cart_po1,'-g','linewidth',1.5)
xlabel('Time (seconds)','fontsize',14)
ylabel('Position m2 (m)','fontsize',14)
grid, hold
figure(4)
plot(t1,cart_vel1,'-k','linewidth',1.5);
%legend('Position','Velocity')
xlabel('Time (seconds)','fontsize',14)
ylabel('Velocity m2 (m/s)','fontsize',14)
grid, hold
回答（1 个）
Sai Sri Pathuri
2020-2-26
0 个投票
The model is generating an output y_out of size 5099x1 (i.e., 5099 rows and 1 column). But you are trying to access 2nd, 3rd and 4th columns which does not exist.
类别
在 帮助中心 和 File Exchange 中查找有关 Matrix Indexing 的更多信息
2020-2-18
2020-2-26
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
