Function call problem. How to solve it?

I have a function, sliceobject(im). I used another m file to compute the input im. After that I used sliceobject(im) But the output can't show in workspace.

I directly use sliceobject with im input is okay.

how to show the output from sliceobject(im)

[Michael Haderlein]

Please give us the header of the sliceobject function (first line) and the line which executes this function. Maybe, even the entire code of the sliceobject function will be necessary to help you find the error.

[tabw]

function [  ] = SliceObject( im )
number=0;
abc=[];
abcd=[];
N=500;
k=1;
q=1;
l=q+1;
t=1;
constant=1;
control=[];
testvalue=[0];
Structure(N).result=zeros(15);
 Result(N).volume=zeros(3);
Cell=im;
[R C]=size(Cell);
temp1=[];
 num=0;
 result=[];
 counter=1;
for i= 1:R
    for j=1:C
Cell(j,i);
if (find(Cell(j,i))==1)  
    temp=[i j];
    temp1=cat(2,temp1,temp); % store all the true pixel into array
     num=num+1;
end
    end
end
a=temp1(counter); % true pixel 
b=temp1(counter+1);
while (counter<=(size(temp1,2)-2))
j=(a-1)*R+b;
result=cat(2,result,j);
c=temp1(counter+2); 
d=temp1(counter+3);
x=((c-a)^2+(d-b)^2)^(1/2);

if (x <= (2)^(1/2))

else
        temp00=[];
        temp00=result;
        Structure(k).result=temp00;
        k=k+1;
        result=[];
        number=number+1;
    end

counter=counter+2;
a=temp1(counter);
b=temp1(counter+1);
end
while (l<=number) 

      tempcon=(abs(bsxfun(@minus,Structure(q).result',Structure(l).result)));
      ans=(tempcon==R|tempcon==R-1|tempcon==R+1);
      Tr=find(ans==1);

      if (Tr>=1)
          Structure(q).result=struct('object',[Structure(q).result Structure(l).result]); 
          Structure(q).result=Structure(q).result.object;
          control=[control,q,l];
          a=control;
      end

       if (l==number)
          Result(t).volume=Structure(q).result;
          aaa=q;
          q=(1:number);
          q=setdiff(q,control); 
          aa=q;
          l=q(2);
          q=q(1);
              if (q==aaa)
                     control=[control,q];
                     q=(1:number);
                     q=setdiff(q,control); 
                     l=q(2);
                     q=q(1);
              end
          t=t+1;  
       else
              if (l==2)
                   l=l+1;
              else
              y= (isempty(Tr));
              if (y==1)
                  l=l+1;
              end
              end
                   while any(l==a) && (l<number)
                              l=l+1;                         
                   end                 
       end
  end

Answer 1

[Adam]

result = sliceobject(im);

should work fine.

Occasionally I find that my workspace doesn't refresh itself so I press F5 or just type e.g. 'result' on the command line to force the update and double check 'result' is in fact in the workspace.

[tabw]

It won't work. I have many many output from that function

[Adam]

Judging by what you just pasted in above you have no outputs from your function. Your function signature is:

function [  ] = SliceObject( im )

That means you have 0 output arguments (the same as if you just defined it as 'function SliceObject( im )'

If you want to return things from your function's workspace (which goes out of scope after the last line of the function you need, for example:

function [Structure, Result] = SliceObject( im );

then call this as:

[Structure, Result] = SliceObject( im )

on command line or in another function or script and then you can see those variables in your workspace.

[tabw]

is there any ways to output all the stuff? without mention inside[]

Any way to output all the stuff?

Can I just write function=SliceObject(im)?

And I tried [Structure, Result] = SliceObject( im ). Not working. Still hided the output.

Actually, I just need Result(t).volume as output. I tried function [Result]=SliceObject(im) then [Result]=SliceObject(im).

however can't work

[Adam]

You need to be more specific than just "can't work".

The only way you get outputs from a function is to include them in the output argument list. If you want to output 20 arguments or whatever then you need to start questioning the design of your code as the purpose of a function is to hide a lot of the intermediate stuff in its own workspace and just return you the results you need.

I don't have time to understand your whole code so I just picked out 'Structure' and 'Result' as example variables in your function's workspace by a quick scan of the code. Despite that I still don't see why what I suggested would not return those two values assuming they are still in scope when your function ends which they seem to be.

If all you need as output is Result(t).volume it probably shouldn't be in a struct, but returning the entire Result array of structs should work as I said above (based on a glance over your code rather than an in-depth look) so you need to be more explicit what aspect of it doesn't work.

[tabw]

Actually,I need entire "Result" array of Structure. t=1......until it ends,let's say ,600.

I simply used function [Result]=SliceObject(im) and then [Result]=SliceObject(im).

It should work normally. But, I don't know why It won't work this time

But,nothing popped up and store in workspace

[Adam]

What did happen though? Did the function run to completion? Did you step in with the debugger and check everything was working as expected?