Re: least square solution of b = A * x with a very huge A matrix

[c.]

On 30 May 2013, at 10:22, "Abbott, Ben" <address@hidden> wrote:

> On May 30, 2013, at 4:08 PM, andrea console wrote:
> 
>> Il giorno giovedì 30 maggio 2013, Nir Krakauer <address@hidden> ha scritto:
>>> Is it possible to send a working (or nonworking, as the case may be) 
>>> example?
>> 
>> Do you need the entire program with related data source files or can I 
>> attach the A and b matrices (please tell me how)?
> 
> Just put the A and b matrices in to a file and zip it up
> 
>       save example.mat A b
>       zip example.zip example.mat
> 
> Then put the zipped file somewhere it can be accessed. Perhaps Dropbox, 
> GoogeDrive, or some other convenient place.
> 
> Ben

Actually, as you said your matrices have block structure it would probably be 
useful in studying your problem
if you could save the blocks separately in those files, e.g.:

A_blocks{1,1} = … ;
A_blocks{1,2} = … ;
A_blocks{1,3} = … ;
…

b_blocks{1} = … ;
b_blocks{2} = … ;
b_blocks{3} = … ;
…

save example.mat A_blocks b_blocks

c.