Hello,

I have a data file 'Mydata.dat' I want to read with the command 'load
'. I used the command:

           load ('Mydata.dat','X');

that does not work. I do not know how?

It should be noted that I have several data files, which I do not know
neither the number of rows nor the number of columns.

Thank you for your help.

Le 08/02/2011 14:31, D.GH a �crit :
> Hello,
> 
> I have a data file 'Mydata.dat' I want to read with the command 'load
> '. I used the command:
> 
>            load ('Mydata.dat','X');
> 
> that does not work. I do not know how?
The load function has to be used only for binary files created by the
save function.
> 
> It should be noted that I have several data files, which I do not know
> neither the number of rows nor the number of columns.
> 
Do you at least know if it is ASCII or binary files and what is their
format.

If it is ascii files that contains only formatted  numerical data
separated with spaces (eventually preceeded by a textual header) you may
try to use the  fscanfMat function

If it does not work you can try the functions
- mfscanf  for ASCII, C-like formatted numbers
- read for ASCII fortran-like formatted numbers and fortran binary files
- mget for C binary files
but all of them require a knowledge on the way the files are organized

If you did not suceed with those you can send me a file sample, i will
try to help you

Serge Steer
> Thank you for your help.

On 8 f=E9v, 16:23, Serge Steer <Serge.St...@inria.fr> wrote:
> Le 08/02/2011 14:31, D.GH a =E9crit :> Hello,
>
> > I have a data file 'Mydata.dat' I want to read with the command 'load
> > '. I used the command:
>
> > =A0 =A0 =A0 =A0 =A0 =A0load ('Mydata.dat','X');
>
> > that does not work. I do not know how?
>
> The load function has to be used only for binary files created by the
> save function.
>
> > It should be noted that I have several data files, which I do not know
> > neither the number of rows nor the number of columns.
>
> Do you at least know if it is ASCII or binary files and what is their
> format.
>
> If it is ascii files that contains only formatted =A0numerical data
> separated with spaces (eventually preceeded by a textual header) you may
> try to use the =A0fscanfMat function
>
> If it does not work you can try the functions
> - mfscanf =A0for ASCII, C-like formatted numbers
> - read for ASCII fortran-like formatted numbers and fortran binary files
> - mget for C binary files
> but all of them require a knowledge on the way the files are organized
>
> If you did not suceed with those you can send me a file sample, i will
> try to help you
>
> Serge Steer
>
> > Thank you for your help.

Hi serge,

For data files that contain a single column, for example:

1
2
-4
........

I managed to read the data, using the commands:

 u=3Dmopen('donnees1.dat','r');
 data=3Dmfscanf(-1,u,'%d')
 mclose(u);

Or

fid =3D file ('open','donnees1.dat','unknown')
data =3D read (fid, -1, 1)
file ('close' , fid)

But for the data files that contain more than one column, for example:

Paris   1324
Lyon  124
Rennes 147
Marseille 1478
Strasbourg 547
command below works :

u=3Dmopen('donnees2.dat','r');
 data=3Dmfscanf(-1,u,'%s %f')
 mclose(u);

Then the following command:

fid =3D file ('open','donnees2.dat','unknown')
data =3D read (fid, -1, 2)
file ('close' , fid)

gives the error message:

-->data =3D read (fid, -1, 2)
                         !--error 49
Fichier ou format incorrect.

///////////////
Do you have an idea for this problem?

Thank you very much

Le 08/02/2011 20:42, D.GH a �crit :
> On 8 f�v, 16:23, Serge Steer <Serge.St...@inria.fr> wrote:
> > Le 08/02/2011 14:31, D.GH a �crit :> Hello,
> >
> >> I have a data file 'Mydata.dat' I want to read with the command 'load
> >> '. I used the command:
> >
> >>            load ('Mydata.dat','X');
> >
> >> that does not work. I do not know how?
> >
> > The load function has to be used only for binary files created by the
> > save function.
> >
> >> It should be noted that I have several data files, which I do not know
> >> neither the number of rows nor the number of columns.
> >
> > Do you at least know if it is ASCII or binary files and what is their
> > format.
> >
> > If it is ascii files that contains only formatted  numerical data
> > separated with spaces (eventually preceeded by a textual header) you may
> > try to use the  fscanfMat function
> >
> > If it does not work you can try the functions
> > - mfscanf  for ASCII, C-like formatted numbers
> > - read for ASCII fortran-like formatted numbers and fortran binary files
> > - mget for C binary files
> > but all of them require a knowledge on the way the files are organized
> >
> > If you did not suceed with those you can send me a file sample, i will
> > try to help you
> >
> > Serge Steer
> >
> >> Thank you for your help.
>
> Hi serge,
>
> For data files that contain a single column, for example:
>
> 1
> 2
> -4
> .......
>
> I managed to read the data, using the commands:
>
>  u=mopen('donnees1.dat','r');
>  data=mfscanf(-1,u,'%d')
>  mclose(u);
>
> Or
>
> fid = file ('open','donnees1.dat','unknown')
> data = read (fid, -1, 1)
> file ('close' , fid)
>
> But for the data files that contain more than one column, for example:
>
> Paris   1324
> Lyon  124
> Rennes 147
> Marseille 1478
> Strasbourg 547
> command below works :
>
> u=mopen('donnees2.dat','r');
>  data=mfscanf(-1,u,'%s %f')
>  mclose(u);
>
> Then the following command:
>
> fid = file ('open','donnees2.dat','unknown')
> data = read (fid, -1, 2)
> file ('close' , fid)
>
> gives the error message:
>
> -->data = read (fid, -1, 2)
>                          !--error 49
> Fichier ou format incorrect.
>
> ///////////////
> Do you have an idea for this problem?
>
> Thank you very much
The read function is more restrictive, the data contained in the file
must be of homogeneous type (all numbers or all strings)

On 10 f=E9v, 10:56, Serge Steer <Serge.St...@inria.fr> wrote:
> Le 08/02/2011 20:42, D.GH a crit :
>
> > On 8 f v, 16:23, Serge Steer <Serge.St...@inria.fr> wrote:
> > > Le 08/02/2011 14:31, D.GH a crit :> Hello,
>
> > >> I have a data file 'Mydata.dat' I want to read with the command 'loa=
d
> > >> '. I used the command:
>
> > >> =A0 =A0 =A0 =A0 =A0 =A0load ('Mydata.dat','X');
>
> > >> that does not work. I do not know how?
>
> > > The load function has to be used only for binary files created by the
> > > save function.
>
> > >> It should be noted that I have several data files, which I do not kn=
ow
> > >> neither the number of rows nor the number of columns.
>
> > > Do you at least know if it is ASCII or binary files and what is their
> > > format.
>
> > > If it is ascii files that contains only formatted =A0numerical data
> > > separated with spaces (eventually preceeded by a textual header) you =
may
> > > try to use the =A0fscanfMat function
>
> > > If it does not work you can try the functions
> > > - mfscanf =A0for ASCII, C-like formatted numbers
> > > - read for ASCII fortran-like formatted numbers and fortran binary fi=
les
> > > - mget for C binary files
> > > but all of them require a knowledge on the way the files are organize=
d
>
> > > If you did not suceed with those you can send me a file sample, i wil=
l
> > > try to help you
>
> > > Serge Steer
>
> > >> Thank you for your help.
>
> > Hi serge,
>
> > For data files that contain a single column, for example:
>
> > 1
> > 2
> > -4
> > .......
>
> > I managed to read the data, using the commands:
>
> > =A0u=3Dmopen('donnees1.dat','r');
> > =A0data=3Dmfscanf(-1,u,'%d')
> > =A0mclose(u);
>
> > Or
>
> > fid =3D file ('open','donnees1.dat','unknown')
> > data =3D read (fid, -1, 1)
> > file ('close' , fid)
>
> > But for the data files that contain more than one column, for example:
>
> > Paris =A0 1324
> > Lyon =A0124
> > Rennes 147
> > Marseille 1478
> > Strasbourg 547
> > command below works :
>
> > u=3Dmopen('donnees2.dat','r');
> > =A0data=3Dmfscanf(-1,u,'%s %f')
> > =A0mclose(u);
>
> > Then the following command:
>
> > fid =3D file ('open','donnees2.dat','unknown')
> > data =3D read (fid, -1, 2)
> > file ('close' , fid)
>
> > gives the error message:
>
> > -->data =3D read (fid, -1, 2)
> > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0!--error 49
> > Fichier ou format incorrect.
>
> > ///////////////
> > Do you have an idea for this problem?
>
> > Thank you very much
>
> The read function is more restrictive, the data contained in the file
> must be of homogeneous type (all numbers or all strings)

Merci Serge,

Thank you for these explanations