Problem 16. Return the largest number that is adjacent to a zero giving me error on my correct code

In problem 16 I used the following solution:

function b = nearZero(a)
  b =  max(a(imdilate(a == 0, [1 1 1])));
end

It is working pretty well on mathlab but when I submit my answer to cody, the following error is generated:

Undefined function 'imdilate' for input arguments of type 'double'.

Error in nearZero (line 2)

b = max(a(imdilate(a == 0, [1 1 1])));

Error in Test1 (line 3)

assert(isequal(nearZero(a),b))

Answer 1

[Image Analyst]

That function is in the Image Processing Toolbox, which evidently you do not have. Type

>> ver

to see what toolboxes you have installed.

Try this to verify whether or not you have the Image Processing Toolbox installed:

% Check that user has the specified Toolbox installed and licensed.
hasLicenseForToolbox = license('test', 'image_toolbox');	% Check for Image Processing Toolbox.
% hasLicenseForToolbox = license('test','Statistics_toolbox');	% Check for Statistics and Machine Learning Toolbox.
% hasLicenseForToolbox = license('test','Signal_toolbox');	% Check for Signal Processing Toolbox.
% hasLicenseForToolbox = license('test', 'video_and_image_blockset');	% Check for Computer Vision System Toolbox.
if ~hasLicenseForToolbox
	% User does not have the toolbox installed, or if it is, there is no available license for it.
	% For example, there is a pool of 10 licenses and all 10 have been checked out by other people already.
	ver % List what toolboxes the user has licenses available for.
	message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
	reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
	if strcmpi(reply, 'No')
		% User said No, so exit.
		return;
	end
end

[Nabil Miri]

In my matlab it is working but in the cody challenge compiler on the matlab website it is not.

[Image Analyst]

imdilate is basically a moving max filter, so see if you can replace imdilate with movmax().

[Nabil Miri]

Thanks. The movmax() function has worked.

b = max(nonzeros(a(movmax(a == 0, [1 1])))')