Help with an error when calling a function

Hi All,

I have the following function, but every time I call it I get this error message.

function [C] = SquareCentroids( TempT, a, files, RawImages)
    load('C:\Users\ezxtg4\OneDrive - The University of Nottingham\AFT and carbolite interpretation\Ash fusion analysis\Created Functions\Classifier.mat')
    
    b1 = a;
    b2 =  find(TempT==500);
    chk = isempty(b2);
    if chk == 1
        b2 =  find(TempT==501);
        chk = isempty(b2);
        if chk == 1
            b2 =  find(TempT==502);
            chk = isempty(b2);
            if chk == 1
                b2 =  find(TempT==503);
            end
        end
    end
    
    L = int16(linspace(b1,b2,3));
    Number_of_Squares_found = 1;
    
    
for i = L
    progressbar(0,0) % Init 2 bars
       Classifying_Image_TIFF = imread([RawImages '/' files(i).name]);  % Original (files(i).name) added RawImages co it couldnt find it.
       Classifying_Image_JPG = rgb2gray(Classifying_Image_TIFF(:,:,1:3));
       Classifying_Image_Binarized = imbinarize(Classifying_Image_JPG);
       Width_of_Classifying_Box = 90;
       Height_of_Classifying_Box = 85;
       [Ymax,Xmax] = size(Classifying_Image_JPG);
       cellSize = [4 4];
       [hog_4x4, vis4x4] = extractHOGFeatures(Classifying_Image_Binarized(1:Height_of_Classifying_Box,1:Width_of_Classifying_Box),'CellSize',cellSize);
   
    for X = 1:15:(Xmax-Width_of_Classifying_Box)  
        progressbar([],0) % Reset 2nd bar
        for Y = 1:15:(Ymax-Height_of_Classifying_Box)
        Square_Prediction = predict(classifier,extractHOGFeatures(Classifying_Image_Binarized(Y:Y+Height_of_Classifying_Box, X:X+Width_of_Classifying_Box),'CellSize',cellSize));
        if Square_Prediction == 1
           SquarePredictorTable(Number_of_Squares_found,1)= Y + Height_of_Classifying_Box/2;
           SquarePredictorTable(Number_of_Squares_found,2)= X + Width_of_Classifying_Box/2;
           Number_of_Squares_found = Number_of_Squares_found + 1;
        end
        progressbar([],Y/(Ymax-Height_of_Classifying_Box)) % Update 2nd bar
        end
        progressbar(X/(Xmax-Width_of_Classifying_Box)) % Update 1st bar
    end
end
    
%      imshow(Classifying_Image_JPG);
%      hold('on');
%      plot(SquarePredictorTable(:,2), SquarePredictorTable(:,1), 'r*');
     
     
     % Averaging data points from the Square predictor table
     
     A = SquarePredictorTable;
     [C,ia] = uniquetol(A(1:(Number_of_Squares_found-1),:), .10, 'ByRows', true);
    %hold('on');
    %plot(C(:,2), C(:,1), 'c*');
end

and the error:

Unrecognized function or variable 'SquarePredictorTable'.

Error in SquareCentroids (line 56)
     A = SquarePredictorTable;

Is there any way I can fix this please? Thank you in advance!

[Adam Danz]

SquarePredictorTable is never being defined.

It could have been interrupted by an error or perhaps the Square_Prediction==1 condition never being met.

Use debug-mode to explore what's happening in your code. Here's a GIF showing how to set a breakpoint.

Answer 1

[Cris LaPierre]

It would appear either one of your for loops is not executing, or your if statement Square_Prediction == 1 is never true. When that happens, SquarePredictorTable is not created, resulting in the error that you see.