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A problem about "[ ]" "( )" "="

I want to read several images saved in a director,and give them to
I1,I2 ,I3....,using the following codes:
  filelist=dir(['c:\MATLAB701\work\...\*.jpg']);
for i=1 :length(filelist)
  
I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name));
end;
 but failed. Then I used I(i)=imread... ,still failed.
How could I do?
0
John
10/31/2005 1:53:05 PM
comp.soft-sys.matlab 211266 articles. 22 followers. lunamoonmoon (257) is leader. Post Follow

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"John" <mailofww@126.com> wrote in message 
news:ef19e12.-1@webx.raydaftYaTP...
>I want to read several images saved in a director,and give them to
> I1,I2 ,I3....,using the following codes:
>  filelist=dir(['c:\MATLAB701\work\...\*.jpg']);
> for i=1 :length(filelist)
>
> I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name));
> end;
> but failed. Then I used I(i)=imread... ,still failed.
> How could I do?

See questions 3.6 and 3.12 in the newsgroup FAQ:

http://www.mit.edu/~pwb/cssm/

You'd probably want to use a cell array rather than creating N different 
variables.

Just as another suggestion: a better subject for this posting, one that more 
accurately reflects the question being asked, would be "How to read in a 
series of files?"  As a general rule, the clearer your subject line is, and 
the more accurately it describes the question being asked, the more likely 
it is for your question to be answered.

-- 
Steve Lord
slord@mathworks.com 


0
slord (13689)
10/31/2005 1:53:59 PM
John wrote:
>
>
> I want to read several images saved in a director,and give them to
> I1,I2 ,I3....,using the following codes:
> filelist=dir(['c:\MATLAB701\work\...\*.jpg']);
> for i=1 :length(filelist)
>
> I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name));
> end;
> but failed. Then I used I(i)=imread... ,still failed.
> How could I do?

Have a look at the matlab routine EVALIN you can create arbitrary
strings, i.e. within your for-loop, and let them execute together
with the wanted matlab-routine.

HTH, _uli
0
NOSPAM.uvb (13)
10/31/2005 1:56:12 PM
uvb wrote:
>
>
> John wrote:
>>
>>
>> I want to read several images saved in a director,and give them
> to
>> I1,I2 ,I3....,using the following codes:
>> filelist=dir(['c:\MATLAB701\work\...\*.jpg']);
>> for i=1 :length(filelist)
>>
>> I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name));
>> end;
>> but failed. Then I used I(i)=imread... ,still failed.
>> How could I do?
>
> Have a look at the matlab routine EVALIN you can create arbitrary
> strings, i.e. within your for-loop, and let them execute together
> with the wanted matlab-routine.
>
> HTH, _uli
I don't understand.
0
John
10/31/2005 2:13:54 PM
John wrote:
>
>
> uvb wrote:
>>
>>
>> John wrote:
>>>
>>>
>>> I want to read several images saved in a director,and give
> them
>> to
>>> I1,I2 ,I3....,using the following codes:
>>> filelist=dir(['c:\MATLAB701\work\...\*.jpg']);
>>> for i=1 :length(filelist)
>>>
>>>
I=imread(fullfile('c:\MATLAB701\work\...',filelist(i).name));
>>> end;
>>> but failed. Then I used I(i)=imread... ,still failed.
>>> How could I do?
>>
>> Have a look at the matlab routine EVALIN you can create
arbitrary
>> strings, i.e. within your for-loop, and let them execute
together
>> with the wanted matlab-routine.
>>
>> HTH, _uli
> I don't understand.

sorry, i meant, EVAL. A quick example:
 for nr=1:3,
     eval(['i' num2str(nr) '=' num2str(nr) ]);
 end

this will create 3 variables i1,i2,i3 and will execute and assign the
statement after '='! You can write any statement there - but it muast
be defined as string.
.... isn't it what you want?
br _uli
0
NOSPAM.uvb (13)
11/7/2005 2:10:56 PM
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