Getting error of Double

This is portion of my code

function [dtmf]=dtmfdial(x,fs);
%This function produces DTMF Tone  corresponding to given 
%key number
%abcdefg=input key numbers
%fs= The sampling frequency
lfg = [697 770 852 941]; % Low frequency group
hfg = [1209 1336 1477];  % High frequency group
f  = [];
for c=1:4,
  for r=1:3,
      f = [ f [lfg(c);hfg(r)] ];
  end
end
table=f';
dur=.5;
tt=0:(1/fs):dur;
n=length(x);

C=cell(1,length(x));

for k=1:n
    if x(k)==1
        freqa=table(1,1);
        freqb=table(1,2);
    else if x(k)==2
        freqa=table(2,1);
        freqb=table(2,2);

and so on

When i run this function i get this error

>> dtmf=dtmfdial([1 2 3 4 5 6 7],8000)

??? Undefined function or method 'dtmfdial' for input arguments of type 'double'.

Answer 1

[Wayne King]

Hi, are you actually assigning anything to dtmf inside your function?

For example, if you wrote a function

function test = test_func(x)
test1 = x+1;

And called that function at the command line:

y = test_func(4);

You would get that error message, because you assign the output to test1 inside the function, but the function is set up to return test.

[moonman]

Thanks a lot King

Answer 2

[Honglei Chen]

Is your dtmfdial on path? You can also try

rehash toolbox

to regenerate the path.

HTH

Answer 3

[Laura Proctor]

Try the command

which dtmfdial

at the command window. Perhaps the function is not on your path or you have a variable with the name dtmfdial. This will let you know why it's not working.

Answer 4

[moonman]

Ok my this prblem is solved and i am listening tones but i am getting one error at end after listening the tones

??? Output argument "dtmf" (and maybe others) not assigned during call to "E:\Installed\Matlab 2011\Work\DTMF\dtmfdial.m>dtmfdial".