Thread Subject: Saving data

Hi ,

I want to be able to save data corresponding to a parameter
from running a m-file. I want to run the m-file many times
and save the results fro each run in a file and at the end
re-call them to plot them as a mesh.

For example,

I run the file and save the parameter I am interested in,
lets just call it 'x'. Now I run the file again(this time
by changing a different parameter, 'y') and save the data
of parameter 'x' again now with a different name.

So

when y=1, lets say x=1,2,3,4,5,...10000000000
when y=2, lets say x=10,20,30,40,50,.....0100000030
when y=3, lets say x=1,2,35789l,356,78,...1000000

.
.
and so on

I want to be able to save x for each value of y and then
plot them all as mesh with x depending on parameter, y and
another parameter 't' which is the same for all runs.

What command should I be using to save x , each time I run
my file?

Any help will be much appreciated!!!

M K wrote:
> Hi ,
>
> I want to be able to save data corresponding to a parameter
> from running a m-file. I want to run the m-file many times
> and save the results fro each run in a file and at the end
> re-call them to plot them as a mesh.
>
> For example,
>
> I run the file and save the parameter I am interested in,
> lets just call it 'x'. Now I run the file again(this time
> by changing a different parameter, 'y') and save the data
> of parameter 'x' again now with a different name.
>
> So
>
> when y=1, lets say x=1,2,3,4,5,...10000000000
> when y=2, lets say x=10,20,30,40,50,.....0100000030
> when y=3, lets say x=1,2,35789l,356,78,...1000000
>
> .
> .
> and so on
>
> I want to be able to save x for each value of y and then
> plot them all as mesh with x depending on parameter, y and
> another parameter 't' which is the same for all runs.
>
> What command should I be using to save x , each time I run
> my file?

Maybe the SAVE command? HELP SAVE

marky <no@email.com> wrote in message
<fn286q$9rd$1@news.oulu.fi>...
> M K wrote:
> > Hi ,
> >
> > I want to be able to save data corresponding to a
parameter
> > from running a m-file. I want to run the m-file many
times
> > and save the results fro each run in a file and at the end
> > re-call them to plot them as a mesh.
> >
> > For example,
> >
> > I run the file and save the parameter I am interested in,
> > lets just call it 'x'. Now I run the file again(this time
> > by changing a different parameter, 'y') and save the data
> > of parameter 'x' again now with a different name.
> >
> > So
> >
> > when y=1, lets say x=1,2,3,4,5,...10000000000
> > when y=2, lets say x=10,20,30,40,50,.....0100000030
> > when y=3, lets say x=1,2,35789l,356,78,...1000000
> >
> > .
> > .
> > and so on
> >
> > I want to be able to save x for each value of y and then
> > plot them all as mesh with x depending on parameter, y and
> > another parameter 't' which is the same for all runs.
> >
> > What command should I be using to save x , each time I
run
> > my file?
>
> Maybe the SAVE command? HELP SAVE


You already answer your own question !!!

>> help save

By the way, there are some useful functions to genrate
automatically filenames.

  MFILENAME Name of currently executing M-file.
  FULLFILE Build full filename from parts.
  SPRINTF Write formatted data to string.

Anh Huy Phan
RIKEN - BSI


  

Thanks for replies !

So when I try saving

%%savetest is the filename and x is the variable that needs
%%to be saved

save savetest x


it gets saved as a microsoft access table under the
name 'savetest'. how could I set the filename ?

Does sprintf help me set a file name depending on the
parameter 'y'?

Why is the following not working?

fname=sprintf('output y%',y)
save fname x

and when i recall by using

load fname, it doesn't load it the way I want it to. it
only brings out the last set of x values. Any help will be
appreciated!

"M K" <maha_k@mathworks.com> wrote in message
<fn4lb6$qpt$1@fred.mathworks.com>...
> Thanks for replies !
>
> So when I try saving
>
> %%savetest is the filename and x is the variable that needs
> %%to be saved
>
> save savetest x
>
>
> it gets saved as a microsoft access table under the
> name 'savetest'. how could I set the filename ?
>
> Does sprintf help me set a file name depending on the
> parameter 'y'?
>
> Why is the following not working?
>
> fname=sprintf('output y%',y)
> save fname x
>
> and when i recall by using
>
> load fname, it doesn't load it the way I want it to. it
> only brings out the last set of x values. Any help will be
> appreciated!
>

Put these lines at the end of your m file

fname=sprintf('output_y_%d',y);
save(fname,'x','y')

Each time you run this file, one new file output*.mat will be
created.

HTH
Anh Huy Phan
RIKEN - BSI

"M K" <maha_k@mathworks.com> wrote in message
news:fn4lb6$qpt$1@fred.mathworks.com...
> Thanks for replies !
>
> So when I try saving
>
> %%savetest is the filename and x is the variable that needs
> %%to be saved
>
> save savetest x
>
>
> it gets saved as a microsoft access table under the
> name 'savetest'. how could I set the filename ?

Use the function form of SAVE.

> Does sprintf help me set a file name depending on the
> parameter 'y'?
>
> Why is the following not working?
>
> fname=sprintf('output y%',y)
> save fname x

This is the command form of SAVE. It's equivalent to:

save('fname', 'x')

You need to use the functional form of SAVE when one of the string inputs is
stored in a variable, in order to pass the _contents_ of that variable
rather than _a string containing the name of that variable_ to the function:

save(fname, 'x')

For more information on the command and function calling syntaxes, read the
"MATLAB Calling Syntax" section of this documentation page:

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_prog/f7-58170.html

For information on command versus function syntax as it specifically
pertains to LOAD and SAVE, read:

http://www.mathworks.com/support/solutions/data/1-16FP4.html?solution=1-16FP4

--
Steve Lord
slord@mathworks.com

I like using dlmwrite to save the data into a text file.
In dlmwrite you can have the data with tabs, which also
allows easy opening in excel (if needed).

You can have a count parameter ct = ct + 1 that will
update every time you run the code and then use that
number in the file name...

Daphne