What is wrong with this code?

What is wrong with this code?

clc;

clear all;

close all;

n1=1;n2=25; den = [1 6 25];

step =[n1,den];

title('Transfer function when numerator = 1')

figure, step=[n2,den];

title('Standard transfer function')

[madhan ravi]

Original question:

What is wrong with this code?

clc;
 clear all; 
close all;
n1=1;n2=25; den = [1 6 25];
step =[n1,den];
title('Transfer function when numerator = 1')
figure, step=[n2,den];
title('Standard transfer function')

Answer 1

[madhan ravi]

clear all % never name a variable step
n1=1;
n2=25;
den = [1 6 25];
Tf =tf(n1,den);
figure(1)
step(Tf)
title('Transfer function when numerator = 1')
figure(2), Tf1=tf(n2,den);
step(Tf1)
title('Standard transfer function')

[jake carl]

There is an error in the fifth line, I tried more than once to modify it, and I did not understand what was wrong

[Image Analyst]

You forgot to give us the error -- ALL the red text. Jake, make it easy for people to help you, not hard.

https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[jake carl]

Error in Untitled35 (line 5)

Tf =tf(n1,den);

it is like this

[madhan ravi]

Nope , that’s not the entire error message. Either you do don’t Control System Toolbox or a valid license for it or you created a file named tf.m if so remove it from the path or rename it.