# How to solve "Index exceeds matrix dimensions" error?

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noor shahida on 24 Jun 2013
Commented: Jan on 23 Oct 2017
Hi all.. I have a coding here..which is when i run it appear "Index exceeds matrix dimensions".Can anyone help.
NumBasei = 1;
for NBi = 1:InnerRings-1;
NumBasei = NumBasei + 6*NBi;
end
B_dist = sqrt(B_x.^2 + B_y.^2);
Bdata = [B_dist' B_x' B_y' B_l']; % distance % x % y % label
Bdata_s = sortrows(Bdata);
Bdata_in = Bdata_s(1:NumBasei , :);
scatter(Bdata_in(:,2)',Bdata_in(:,3)',20,'filled','w');
thanks.
##### 2 CommentsShow 1 older commentHide 1 older comment
noor shahida on 24 Jun 2013
error come from Bdata_in = Bdata_s(1:NumBasei , :);
NumBase = length(B_x); for BC = 1:NumBase; Bx = B_x(1,BC); By = B_y(1,BC); if draw_bounds==1; line([Bx-R*cosd(60) Bx+R*cosd(60) Bx+R Bx+R*cosd(60) Bx-R*cosd(60)... Bx-R Bx-R*cosd(60)],[By+R*sind(60) By+R*sind(60) ... By By-R*sind(60) By-R*sind(60) By By+R*sind(60)]); hold on end fnb = floor(NumBase/4); if (BC == fnb)||(BC==2*fnb)||(BC==3*fnb); end scatter(Bx,By,70,'filled');
end
NumBasei = 1; for NBi = 1:InnerRings-1; NumBasei = NumBasei + 6*NBi; end B_dist = sqrt(B_x.^2 + B_y.^2); Bdata = [B_dist' B_x' B_y' B_l']; % distance % x % y % label Bdata_s = sortrows(Bdata); Bdata_in = Bdata_s(1:NumBasei , :); scatter(Bdata_in(:,2)',Bdata_in(:,3)',20,'filled','w');

Jan on 24 Jun 2013
You can use the debugger to find out more details:
dbstop if error
Then start the program again. It stops, when the error occurs. Then you can inspect the indices and the available dimensions.
Jan on 24 Jun 2013
Of course the error appears in the same place. This is the nature of a debugger. But now you can check the size of the locally used variables and find out, why Bdata_s has les than NumBasei rows.

Hugo on 24 Jun 2013
At first glance, the error should appear as a consequence of the line
Bdata_in = Bdata_s(1:NumBasei , :);
So, I would recommend you to compare the value of "NumBasei" with the number of rows in Bdata_s. If NumBasei is greater than size(Bdata_s,1), then you should do something about it.

poongothai rajan on 30 May 2014
[rows, cols, numOfBands] = size(T); % totalPixelsOfImage = rows*cols*numOfBands; image = rgb2hsv(T);
% split image into h, s & v planes h = image(:, :, 1); s = image(:, :, 2); v = image(:, :, 3);
I have a coding here..which is when i run it appear "Index exceeds matrix dimensions".Can anyone help.

poongothai rajan on 30 May 2014
I have a coding here..which is when i run it appear "Index exceeds matrix dimensions".Can anyone help.
[rows, cols, numOfBands] = size(T);% totalPixelsOfImage = rows*cols*numOfBands; image = rgb2hsv(T);(T is the training database)
% split image into h, s & v planes
h = image(:, :, 1);
s = image(:, :, 2);
v = image(:, :, 3);

Nikhil Shrestha on 23 Oct 2017
Edited: Walter Roberson on 23 Oct 2017
openExample('images/BoostLocalColorContrastUsingColorModeExample')
Index exceeds matrix dimensions.
Error in openExample (line 10)
Jan on 23 Oct 2017
@Nikhil Shrestha: Please open a new thread for a new question. If you only hijack another thread, you cannot accept an answer, but cause confusion, because it is not longer clear to which question an answer belongs to. After creating a new question, p0lease remove this "pseudo-answer"- Thanks.