Prev: merging matrices in loop
Next: variable classification problems with parfor
From: MOOON MOOON on 24 Jun 2010 15:21

Hello,

Could you please help me in this matter.

Assume we have the following data:

H_T=[36 66 21 65 52 67 73 ; 31 23 19 33 36 39 42 ]

P=[40 38 39 40 35 32 37 ]

I want to create new three matrices that have
the following properties:

the matrix H (the first part in matrix H_T) will be divided to 3 intervals

matrix 1 : the 1st interval contains the H values between 20 to 40
matrix 2 : the 2nd interval contains the H values between 40 to 60
matrix 3 : the 3rd interval contains the H values between 60 to 80

the important thing is that the corresponding T and P
also will be included in their new matrices meaning that H will
control the new matrices depending on the specifications defined above.

so, the resultant matrices will be:

H_T_1=[36 21 ; 31 19]
P_1=[40 39]


H_T_2=[52 ; 36]
P_2=[35]


H_T_3=[66 65 67 73 ; 23 33 39 42]
P_3=[38 40 32 37]

Actually, this is a simple example and it is easy by looking
to create the new matrices depending on the specifications,
BUT in my values I have thousands of data which is very difficult
to do that.


Any help is highly appreciated.
best regards.
From: us on 24 Jun 2010 15:42
"MOOON MOOON" <shaheed107(a)yahoo.com> wrote in message <i00b71$45o$1(a)fred.mathworks.com>...
>
> Hello,
>
> Could you please help me in this matter.
>
> Assume we have the following data:
>
> H_T=[36 66 21 65 52 67 73 ; 31 23 19 33 36 39 42 ]
>
> P=[40 38 39 40 35 32 37 ]
>
> I want to create new three matrices that have
> the following properties:
>
> the matrix H (the first part in matrix H_T) will be divided to 3 intervals
>
> matrix 1 : the 1st interval contains the H values between 20 to 40
> matrix 2 : the 2nd interval contains the H values between 40 to 60
> matrix 3 : the 3rd interval contains the H values between 60 to 80
>
> the important thing is that the corresponding T and P
> also will be included in their new matrices meaning that H will
> control the new matrices depending on the specifications defined above.
>
> so, the resultant matrices will be:
>
> H_T_1=[36 21 ; 31 19]
> P_1=[40 39]
>
>
> H_T_2=[52 ; 36]
> P_2=[35]
>
>
> H_T_3=[66 65 67 73 ; 23 33 39 42]
> P_3=[38 40 32 37]
>
> Actually, this is a simple example and it is easy by looking
> to create the new matrices depending on the specifications,
> BUT in my values I have thousands of data which is very difficult
> to do that.
>
>
> Any help is highly appreciated.
> best regards.

one of the many solutions

% the data
m=[
36 66 21 65 52 67 73
31 23 19 33 36 39 42
];
v=[40 38 39 40 35 32 37];
iv=[
20 40
40 60
60 80
];
% the engine
[ix,ix]=arrayfun(@(x,y) histc(m(1,:),x:y),iv(:,1),iv(:,2),'uni',false);
r=cellfun(@(x) [m(:,x~=0);v(x~=0)],ix,'uni',false);
% the result
% - note: each CELL combines your two outputs; simply take them apart if necessary
r{1}
%{
36 21 % <- HT_T_1 row 1
31 19 % <- HT_T_1 row 2
40 39 % <- P_1
%}

us
From: MOOON MOOON on 24 Jun 2010 17:41

Thanks for your reply,

but when I write the following function in MATLAB:

[ix,ix]=arrayfun(@(x,y) histc(m(1,:),x:y),iv(:,1),iv(:,2),'uni',false);

it gives me the following error:

??? Undefined command/function 'arrayfun'.

Also, I searched for the function ( arrayfun ), but it is not found

Any idea ?

thanks
From: Steven Lord on 24 Jun 2010 17:58

"MOOON MOOON" <shaheed107(a)yahoo.com> wrote in message
news:i00jdv$1e9$1(a)fred.mathworks.com...
>
> Thanks for your reply,
>
> but when I write the following function in MATLAB:
>
> [ix,ix]=arrayfun(@(x,y) histc(m(1,:),x:y),iv(:,1),iv(:,2),'uni',false);
>
> it gives me the following error:
>
> ??? Undefined command/function 'arrayfun'.
>
> Also, I searched for the function ( arrayfun ), but it is not found
>
> Any idea ?

ARRAYFUN was introduced in MATLAB 7.1 (R14SP3). If you have an older
version, you will not be able to use this function.

http://www.mathworks.com/access/helpdesk/help/techdoc/rn/f30-1008061.html#f30-1008158

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
To contact Technical Support use the Contact Us link on
http://www.mathworks.com


From: MOOON MOOON on 24 Jun 2010 18:09

Unfortunately,

I am using MATLAB 7.0

So, this function is not defined.


But, is there another solution to my problem.

regards
 |  Next  |  Last
Pages: 1 2
Prev: merging matrices in loop
Next: variable classification problems with parfor