Error using tf using input from GUI

Hi,

I having issue on using tf function in my program, i was hope to take input from GUI to form a transfer function by using below code, but everytime when i run it, it show "Error using tf (line 248)"

a = get (handles.input1,'string');
b = get (handles.input2,'string');
fs=tf(a,b);

Answer 1

[Walter Roberson]

I suspect you need

a = str2num( get(handles.input1,'string') );
b = str2num( get(handles.input2,'string') );
fs = tf(a, b);

[llca llasd]

Thanks, it solve the error.

do you have any idea if i want to perform inverse Laplace to the fs which code show i use? as i try ilaplace it show error: Error in Laplace_Calculator>pushbutton1_Callback (line 86) ft = ilaplace(fs);

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/46034-inverse-laplace-transform-of-transfer-function-class

[llca llasd]

thanks.