MATLAB: To which command refers ~isempty() to

isempty

Sorry for the dumb question, but I am working on a matlab code I didn't write myself and several '~isempty(<1xn> cell in here)' are occuring. Since I am relatively new to matlab and programming, I just don't understand yet to what the isempty refers. I couldn't find any satisfying answers and so i thought maybe i could find help here. The isempty is always bound to an if loop.

like:

 set (handles. ...
 set (handles. ...
 if ~isempty(ZoneElementProtNameUnder{1,1})
        set(handles.protUnder,'String',ZoneElementProtNameUnder{1,1});
 else ...

So does isempty work with the 'set handles' or with the 'ZoneElement…', or even with a previous command? Or what exactly is it doing?

I appreciate any answers or help, thanks!

Best Answer

ZoneElementProtNameUnder is a 2D cell array. ZoneElementProtNameUnder{1,1} is the content of cell on column 1 and row 1 (curly brackets = "content of" for cell arrays). As cells can have empty content, the condition in the IF statement

 if ~isempty(ZoneElementProtNameUnder{1,1})

is just checking that this cell's content is not empty. If true, then the expression

 set(handles.protUnder,'String',ZoneElementProtNameUnder{1,1});

is using the content.

Related Solutions

MATLAB: Converting cells with strings inside cells into strings inside cells

 cellfun(@(x) regexp(x,'(?<=@)(.*)(?=@)','match'),array_of_strings)

 cellfun(@(x) regexp(x,'(?<=@)(.*)(?=@)','tokens','once'),array_of_strings)

MATLAB: How can i compare these two protein sequences

I made a MWE and got a solution. When you see what was wrong you will say "oh man"....

I used the following as an input.

Prot_H_cell = {'AA', 'BB', 'AB', 'AC'};
Prot_M_cell = {'CC', 'AC', 'DA', 'AA'};

This code will fail

x=length(Prot_H_cell);
y=length(Prot_M_cell);
for ii=Prot_H_cell(1:x);
    for jj=Prot_M_cell(1:y);
        W(ii,jj)={strcmp(Prot_H_cell(ii),Prot_M_cell(jj))}
    end 
end

And this wont cause the error

x=length(Prot_H_cell);
y=length(Prot_M_cell);
for ii=1:x
  for jj=1:y
    W(ii,jj)={strcmp(Prot_H_cell(ii),Prot_M_cell(jj))}
  end 
end

hope this helps.

Best Answer

Related Solutions

MATLAB: Converting cells with strings inside cells into strings inside cells

MATLAB: How can i compare these two protein sequences

Related Question