Changing from 'bar' command to 'plot' command.

Double expansion chamber program:

l1=0.05;        
l3=0.05;
l5=0.05;

l2=0.200;        
l4=0.200;        

d1=0.05;
d3=d1;
d5=d1;

d2=0.25;
d4=d2;
M=0;

S1=pi/4*d1*d1;
S3=S1;
S5=S1;

S2=pi/4*d2*d2;
S4=S2;

for z=1:4500;

k=2*pi*z/343;

SP1=[cos(k*l1) 1i*sin(k*l1); 1i*sin(k*l1) cos(k*l1)]; % 2X2 matrix

TP1=[1 0; 0 S2/S1];

SP2=[cos(k*l2) 1i*sin(k*l2); 1i*sin(k*l2) cos(k*l2)];% 2X2 matrix

TP2=[1 0; 0 S3/S2];

SP3=[cos(k*l3) 1i*sin(k*l3); 1i*sin(k*l3) cos(k*l3)];% 2X2 matrix

TP3=[1 0; 0 S4/S3];

SP4=[cos(k*l4) 1i*sin(k*l4); 1i*sin(k*l4) cos(k*l4)];% 2X2 matrix

TP4=[1 0; 0 S5/S4];

SP5=[cos(k*l5) 1i*sin(k*l5); 1i*sin(k*l5) cos(k*l5)];% 2X2 matrix

TLM=SP1*TP1*SP2*TP2*SP3*TP3*SP4*TP4*SP5; % 2X2 matrix

Sum=TLM(1,1)+TLM(2,2)+TLM(2,1)+TLM(1,2); 

Mag=abs(Sum);
TL(z)=20*log10(Mag/2); 
f(z)=z;

end;
   figure(1)
   bar(f,TL,'y');
   xlabel('FREQUENCY in Hertz');
   ylabel('TRANSMISSION LOSS IN dB');
   title('Plot of TRANSMISSION LOSS Versus FREQUENCY');

I want to do this program using 'plot' command rather than 'bar' command. Its showing some errors such as >>too many input arguments.

Answer 1

[Matt J]

You probably have a non-builtin function called 'bar.m' or 'plot.m' somewhere on your path. Execute

 >>which bar(f,TL,'y')
 >>which plot(f,TL,'y')

in the workspace of your code to find out.

[Shantanu K]

It's working if I use the 'bar' command, but I want to use 'plot' command.

[Matt J]

What happened when you did

>>which plot(f,TL,'y')

[Image Analyst]

Try

>>which -all plot

and show us the result in the command window. Next tell us the exact line of code you're executing, plus copy and paste the exact error message (don't paraphrase it, we want the exact message).