I am getting error when i try to listen mat file

Hi i am having mat file its name is sig.mat it is having dtmf tones in it

i m using

x=load('sig.mat');
soundsc(x,8000)

and i am getting error

??? Undefined function or method 'min' for input arguments of type 'struct'.

Error in ==> soundsc at 27 xmin = min(x(:));

Answer 1

[Wayne King]

Hi Moonman, what is x?

>>whos x

If it is a structure, then feed soundsc() the appropriate field

soundsc(x.data,8000)

or whatever the field is.

[Wayne King]

for example if you tried:

x = struct('data',randn(1e3,1));

soundsc(x,8000)

You would get that error. But

soundsc(x.data,8000)

is fine

Answer 2

[moonman]

I am having a mat file and i want to listen it

now i am using this and still getting error

x=load('sig.mat');
soundsc(x.data,8000)

the whosx command returns

 whos x
  Name      Size            Bytes  Class     Attributes

x         1x1             28124  struct

[Wayne King]

enter fieldnames(x) and see what you really want to listen to

Please see my comment above:

for example if you tried:

x = struct('data',randn(1e3,1));

soundsc(x,8000)

You would get that error. But

soundsc(x.data,8000)

is fine

Answer 3

[moonman]

I am doing as per ur instructions now i did this but did not listen any sound

   x = struct('data','dtmfsig.mat');
  soundsc(x.data,8000)

[Wayne King]

That is not per my instructions. I was constructing a struct array as an example. You have entered:

x = load('sig.mat');

x is a structure array, you cannot play a structure array with soundsc(), you have to play a field of a structure array. Enter

fieldnames(x)

and see which part of x you really want to play.

Answer 4

[Jan]

It seems to be nothing but non-trivial. Let me try it also, Wayne:

x = load('sig.mat');
f = fieldnames(x);
fprintf('%s\n', f{:});  % Just for information
soundsc(x.(f{1}), 8000);

[moonman]

Thanks a lot Jan as well