h(z)=2+10z​^-1+2.3z^-​2+3z^-3/1-​78z^-1-9z^​-2+59z^-3+​1-31z^-1+1​6z^-2+4z/1​-4z^-2-7z^​-2

help me to write code

[Bilgee John]

[Star Strider]

Needs parentheses and multiplication operators —

z = tf('z', 'Variable','z^-1')
h = (2+10*z​^-1+2.3*z^-​2+3*z^-3)/(1-​78*z^-1-9*z^​-2+59*z^-3) + (​1-31*z^-1+1​6*z^-2+4*z)/(1​-4*z^-2-7*z^​-2)

Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.

I have no idea what is causing the ‘Invalid text character’ error. You need to solve that.

I tested the essential code with another transfer function, and it works correctly otherwise.

.

[ALESSIO LEREDE]

Maybe you can try to define this transfer function with the function poles and zeros if you have issues in this form

Answer 1

[Image Analyst]

Try this:

z = linspace(0, 5, 200);
num1 = 10 .* z .^ (-1) + 2 .* z .^ (-2) + 3 .* z .^ (-3);
denom1 = 1-78*z.^(-1)-9*z.^(-2)+59*z.^(-3);
num2 = 1 - 31 * z.^(-1) - 16*z.^(-2)+4*z.^(-3);
denom2 = 1 - 4*z.^(-1)-7*z.^(-2);
h = 2 + num1 ./ denom1 + num2 ./ denom2;
plot(z, h, 'b-', 'LineWidth',2)
xlabel('z', 'FontSize', 17)
ylabel('h', 'FontSize', 17)
yline(0, 'LineWidth', 2)
grid on;

[Image Analyst]

Not sure if the last term in numerator 2 is 4*z or 4*z^(-3) because the image is chopped off there. Please check. Here is is for 4z

z = linspace(0, 3, 200);
num1 = 10 .* z .^ (-1) + 2 .* z .^ (-2) + 3 .* z .^ (-3);
denom1 = 1-78*z.^(-1)-9*z.^(-2)+59*z.^(-3);
num2 = 1 - 31 * z.^(-1) - 16*z.^(-2)+4*z;
denom2 = 1 - 4*z.^(-1)-7*z.^(-2);
h = 2 + num1 ./ denom1 + num2 ./ denom2;
plot(z, h, 'b-', 'LineWidth',2)
xlabel('z', 'FontSize', 17)
ylabel('h', 'FontSize', 17)
yline(0, 'LineWidth', 2)