Error when plotting.... No points shown in graph

Hello! I am having trouble plotting my graph. Here is my code. It shows the graph but nothing is plotting. Any idea what is happening? Please let me know! Thank you

xlabel('Time')
ylabel('Thrust')
title('Thrust Varying With Time')
x = linspace(0,0.001,1);
y = linspace(0,5,500);
A = (pi*(.021336)^2)/4;
Po = 400000;
Patm = 101325;
f(x)= (2*(Po-Patm)*A)*x;
plot (x,f(x)) 

Answer 1

[Ameer Hamza]

The left side of the line

f(x)= (2*(Po-Patm)*A)*x;

is not correct. f(x) represent indexing into f using x vector, which is only allowed if all values in x are integers. You don't need that here. Check this code

x = linspace(0,0.001,100);
A = (pi*(.021336)^2)/4;
Po = 400000;
Patm = 101325;
f = (2*(Po-Patm)*A)*x;
plot(x, f)
xlabel('Time')
ylabel('Thrust')
title('Thrust Varying With Time')

[Rose Carroll]

thank you so much!

[Ameer Hamza]

I am glad to be of help!!! :)

Answer 2

[Permesh Lal Jethi Amrick Lall]

Hello, I am plotting a root locus graph based on the following code:

num=[1];

den=[1 3 0];

sys=tf(num,den)

rlocus(sys)

My plot appears but empty. No data.