check if the cells inside a cell array are empty by using if condition

I have a cell array with size (1*100). Some of the cells inside this cell array are empty and have no numbers and have [ ].By clicking on those cells empty page is shown.

My aim is to write a code with if condition to check if the cells inside this cell array are empty then put zero for overlapRatio in below code.

My code:

load('preds_gt_DPM2.mat');    %cell array with size 1*100    %preds_gt_DPM2.mat contains two cell arrays.  Pred_bbox and GT_bbox

load('Pred_bbox.mat');
overlapRatio = {};
for i = 1 : size(GT_bbox,2)
     overlapRatio{i} = bboxOverlapRatio(GT_bbox{i},Pred_bbox{i}); 
  
if Pred_bbox{i}=[]
      
     overlapRatio{i}=0
end
 
end

Answer 1

[Walter Roberson]

if isempty(Pred_bbox{i})

[Sahar Pordeli Behrouz]

Thanks for your reply. I also have another issue. I have no numbers for some of the boxes inside Pred_bbox.mat file. When running the code I get below error:How can I solve this issue because I have no numbers for the box but it says that it should be size m*4.

Error using bboxOverlapRatio

The value of 'bboxB' is invalid. Expected input to be of size Mx4 when it is actually size 0x0.

Error in bboxOverlapRatio>validateAndParseInputs (line 125)

parser.parse(varargin{:});

Error in bboxOverlapRatio (line 61)

[bboxA, bboxB, ratioType] = validateAndParseInputs(varargin{:});

Error in IOUDPM2 (line 13)

overlapRatio{i} = bboxOverlapRatio(GT_bbox{i},Pred_bbox{i});

[Walter Roberson]

nGT = size(GT_bbox,2);
overlapRatio = zeros(1, nGT);
for i = 1 : nGT
    if isempty(Pred_bbox{i})
        overlapRatio(i) = 0;
    else
       overlapRatio(i) = bboxOverlapRatio(GT_bbox{i},Pred_bbox{i}); 
    end
end