MATLAB Central Newsreader - error"Attempt to reference field of non-structure array"

error"Attempt to reference field of non-structure array"

lichao qi — Thu, 05 Jun 2008 00:53:03 -0400

when i open a finished gui .fig file with the guide,it is
ok.However the error happen once i double click it.do
anybody know why?

Re: error

Erik — Thu, 05 Jun 2008 01:54:03 -0400

"lichao qi" <qilichao1106@126.com> wrote in message
<g27ddf$2gn$1@fred.mathworks.com>...
> when i open a finished gui .fig file with the guide,it is
> ok.However the error happen once i double click it.do
> anybody know why?

Can you elaborate a bit? What are you clicking on? The
figure background? Maybe attach some code as well. I wish I
could read minds, but I can't.

Re: error

Image Analyst — Thu, 05 Jun 2008 03:38:02 -0400

"Erik " <emiehling@gmail.com> wrote in message
<g27gvr$7pq$1@fred.mathworks.com>...
> "lichao qi" <qilichao1106@126.com> wrote in message
> <g27ddf$2gn$1@fred.mathworks.com>...
> > when i open a finished gui .fig file with the guide,it
is
> > ok.However the error happen once i double click it.do
> > anybody know why?
>
> Can you elaborate a bit? What are you clicking on? The
> figure background? Maybe attach some code as well. I wish
I
> could read minds, but I can't.

------------------------------------------------------------
Erik:
Well then you just need to purchase the "Mind Reading
Toolkit." It's been recently updated for R2008a. There's
a nifty function called "GenerateAnswer()" that's
especially designed for newgroup postings. It's called
like this:
GenerateAnswer('Help');
GenerateAnswer('Help me');
GenerateAnswer('Please help');
GenerateAnswer('Please Help Me');
GenerateAnswer('i need help!!!');
GenerateAnswer('Help us?!!');
GenerateAnswer('matlab');
GenerateAnswer('MATLAB help');
GenerateAnswer('error');
GenerateAnswer('matlab error');
GenerateAnswer('Urgent help needed');
GenerateAnswer('Why doesn't this work?');
GenerateAnswer('HELP GUI');
GenerateAnswer('big problem');
GenerateAnswer('newbie question');
GenerateAnswer('a dare');
GenerateAnswer('tricky');
GenerateAnswer('anyone can help me');
GenerateAnswer('im also having problems');
GenerateAnswer('How can I do this using matlab');
GenerateAnswer('simple GUI question');
GenerateAnswer('sos');
GenerateAnswer('help needed!!!!');
GenerateAnswer('ERROR MESSAGE');
GenerateAnswer('[no subject]');
GenerateAnswer('hi');
GenerateAnswer('test');
GenerateAnswer('cheap Nike air Jordan');
GenerateAnswer('discount shoes');
and my personal favorite:
GenerateAnswer('Urgent help needed -
pleeeeeeeeeeeze!!!!!!!');
just to mention a few recent actual postings plus a few of
our recurring favorites. There are also some new functions
used thus:
   sarcasticmode on (or off)
   bozofilter on (or off)
   let_Walter_Answer()
   punt_to_John()
   ask_Lord_for_help()
and a gag/joke function
   run_marcos_code()
which simulates a crash of your computer.

I've been using it and it's worth the $1000 purchase
price. How do the other users like it? Any functions that
the toolikt is missing and we should request for the next
release?

Regards,
ImageAnalyst

Re: error

lichao qi — Thu, 05 Jun 2008 08:18:01 -0400

Re: error"Attempt to reference field of non-structure array"

Steven Lord — Thu, 05 Jun 2008 13:54:27 -0400

"lichao qi" <qilichao1106@126.com> wrote in message
news:g27ddf$2gn$1@fred.mathworks.com...
> when i open a finished gui .fig file with the guide,it is
> ok.However the error happen once i double click it.do
> anybody know why?

There are two pieces to a GUI generated by GUIDE -- the FIG-file and the
M-file. You should run your GUI by running the M-file -- it does some setup
then opens the FIG-file. When you open the FIG-file directly by
double-clicking on it in the Current Directory browser (which is where I
assume you double-clicked it) you open the FIG-file without doing the
M-file's setup first, and I'm pretty sure that's what causes the error you
described.

--
Steve Lord
slord@mathworks.com

Re: error"Attempt to reference field of non-structure array"

guj — Thu, 30 Jul 2009 08:55:10 -0400

"Steven Lord" <slord@mathworks.com> wrote in message <g28r6k$b3o$1@fred.mathworks.com>...
>
> "lichao qi" <qilichao1106@126.com> wrote in message
> news:g27ddf$2gn$1@fred.mathworks.com...
> > when i open a finished gui .fig file with the guide,it is
> > ok.However the error happen once i double click it.do
> > anybody know why?
>
> There are two pieces to a GUI generated by GUIDE -- the FIG-file and the
> M-file. You should run your GUI by running the M-file -- it does some setup
> then opens the FIG-file. When you open the FIG-file directly by
> double-clicking on it in the Current Directory browser (which is where I
> assume you double-clicked it) you open the FIG-file without doing the
> M-file's setup first, and I'm pretty sure that's what causes the error you
> described.
>
> --
> Steve Lord
> slord@mathworks.com
>
>

Attempt to reference field of non-structure array !
I always get this error and some time it gone by itself. Yesterday one i was calling a funtion it was giving me error on some line. What this error means can some explain it in a simple maner

Re: error"Attempt to reference field of non-structure array"

Steven Lord — Thu, 30 Jul 2009 13:18:23 -0400

"guj " <gulatiakshay@gmail.com> wrote in message
news:h4rn5e$6jk$1@fred.mathworks.com...
> "Steven Lord" <slord@mathworks.com> wrote in message
> <g28r6k$b3o$1@fred.mathworks.com>...
>>
>> "lichao qi" <qilichao1106@126.com> wrote in message
>> news:g27ddf$2gn$1@fred.mathworks.com...
>> > when i open a finished gui .fig file with the guide,it is
>> > ok.However the error happen once i double click it.do
>> > anybody know why?
>>
>> There are two pieces to a GUI generated by GUIDE -- the FIG-file and the
>> M-file. You should run your GUI by running the M-file -- it does some
>> setup
>> then opens the FIG-file. When you open the FIG-file directly by
>> double-clicking on it in the Current Directory browser (which is where I
>> assume you double-clicked it) you open the FIG-file without doing the
>> M-file's setup first, and I'm pretty sure that's what causes the error
>> you
>> described.
>>
>> --
>> Steve Lord
>> slord@mathworks.com
>>
>>
>
>
> Attempt to reference field of non-structure array !
> I always get this error and some time it gone by itself. Yesterday one i
> was calling a funtion it was giving me error on some line. What this error
> means can some explain it in a simple maner

The short version is that you're taking a variable that is not a struct
array:

x = 1:10;

and trying to ask for a field of that variable, which doesn't work because
regular numeric arrays don't have fields.

y = x.structFieldIndexingWillError

To determine why you receive this error, run your code using the debugging
tools provided in the Editor. If you open up the Help Browser (using the
DOC function) and navigate to the Desktop Tools and Development Environment
item under the MATLAB item in the tree, one of the items should be "Editing
and Debugging M-Files". Read through that to learn how to debug your code
and locate the cause of this error.

--
Steve Lord
slord@mathworks.com