Error unrecognised function or Variable 'ss'
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Hello
I am trying to use the state space model in my MATLAB code, however my Matlab is not recognising it and giving me always the error. I am using R2020a Student Version on Mac Pc.
My Error:
Unrecognized function or variable 'ss'.
Error in ex_2 (line 16)
sys1 = ss(-1/(R*C), 1/(R*C), 1, 0);
My Code:
figure('Name', 'Exercise e)', 'NumberTitle', 'off');
%%Setting arguments and values
R = 1000;
C = 0.001;
L = 100;
%%Establishing matrixes for later use
matrix1 = [0, -1/(L*C); 1, -R/L];
matrix2 = [1, 0];
matrix3 = [0, 1/(L*C)];
%%Creating the functions of the graphs
sys1 = ss(-1/(R*C), 1/(R*C), 1, 0);
sys2 = ss(matrix1, matrix2, matrix3, 0);
%%Drawing the graphs on the same figure
subplot(2,1,1);
impulse(sys1, sys2);
subplot(2,1,2);
step(sys1, sys2);
5 个评论
Walter Roberson
2020-5-3
need the Control System Toolbox to be licensed and installed
Syed Ghayyour Ahmed
2020-5-3
Syed Ghayyour Ahmed
2020-5-3
BAKARI Aymen
2020-6-13
i have the same problem !
could you please told me how can i install the control system toolbox
Walter Roberson
2020-6-13
编辑：Walter Roberson
2020-10-7
and in particular my Answer there
回答（1 个）
Arkadiy Turevskiy
2020-10-7
2 个投票
This question gets a lot of views, so summarizing the answer: this error is due to Control System Toolbox not being installed.
3 个评论
Harsh Jaiswal
2021-2-28
Hi,
I actually have it installed and still get the error. I dont know what could be wrong.
Arkadiy Turevskiy
2021-3-1
Hi, sorry to hear you are having issues.
Can you please post the code that is creating the error. Please also type "ver" at the command line and post the resulting list of products.
>>ver
If you are uncomfortable sharing the code, please contact MathWorks technical support.
Arkadiy
Dániel
2024-2-20
restarting matlab worked for me
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2020-5-3
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