# Kenneth Eaton

### Hellebore Consulting Group, LLC

I'm a seasoned biomedical researcher and software developer with expert knowledge of computational biology, object-oriented programming, image processing, statistical analysis, and user interface design. I've been programming for over 30 years, having cut my teeth on BASIC and Logo when I was 10.

You can often find me on Stack Overflow answering MATLAB questions: http://stackoverflow.com/users/52738/gnovice

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**Content Feed**

Error using FreezePanes in Excel

You could try setting the property with a logical value, since it expects a Boolean type: Excel.ActiveWindow.FreezePanes = true...

2 years ago | 0

What matlab easter eggs do you know?

As <http://blogs.mathworks.com/steve/2006/10/17/the-story-behind-the-matlab-default-image/ Steve discussed in one of his blog po...

4 years ago | 19

I am trying to use the function imfill() but it does not run and the following message is displayed: Undefined function or variable 'eml_assert_all_constant'. I can't find such fuction in MATLAB documentation.

If you use the function <https://www.mathworks.com/help/matlab/ref/which.html |which|> like so: which iptcheckconn -all ...

4 years ago | 3

Why is subsref and subscripted reference not equivalent

Not sure if this is a complete answer, but it appears that invoking subsref directly requires a stricter definition of the outpu...

4 years ago | 1

Hump-day challenger - Recursion

My first attempt: function index = find_index(M,V) switch numel(M) case 0 index = []; case 1 ...

10 years ago | 1

| accepted

How can i remove the sky from this image. (About background removal question)

I'm unclear how <http://www.mathworks.com/help/techdoc/ref/zeros.html ZEROS> is to be used for this problem, but you could do it...

10 years ago | 3

| accepted

How do I generate a given Matrix in one command?

I can't believe no one suggested dilation: A = imdilate(eye(5),ones(2)); Or convolution: A = sign(conv2(eye(5),ones(2),'s...

10 years ago | 3

Slice thickness information lost when using dicomwrite()

I think your problem may be the missing capitalization of the "t" in the name |SliceThickness|. Notice that all the fields in th...

10 years ago | 0

| accepted

How do I save and restore the state data in a GUI?

<http://www.mathworks.com/matlabcentral/fileexchange/24861-41-complete-gui-examples 41 Complete GUI Examples> from Matt Fig on t...

10 years ago | 1

Hump-day puzzler.

In response to Andrew's extra challenge for a solution in which |BLANK| returns |true|, here's an absolutely insane one: func...

10 years ago | 3

Hump-day puzzler.

Here's a pretty goofy answer: true) fprintf('I Love '); end; if (false

10 years ago | 6

What programming challenges would you pose to new users?

Designing simple GUIs can introduce newer users to a number of important concepts. For example... *Challenge:* Create a stopwa...

10 years ago | 2

How to make a list of user's reputation ? :)

Here's yet another variation that uses Walter's idea of going through the pages of questions, fetching the question links, then ...

10 years ago | 3

How to compare two different cell arrays ?

The <http://www.mathworks.com/help/techdoc/ref/setdiff.html SETDIFF> function does what you want. It will give you the values in...

10 years ago | 10

| accepted

How do I write a good answer for MATLAB Answers?

I'm generally in favor of pointing out when a key edit (i.e. correction) has been made to an answer for the following reasons: ...

10 years ago | 5

Using find in a 3d matrix in MATLAB.

When finding values in multidimensional (i.e. greater than 2-D) arrays using the function <http://www.mathworks.com/help/techdoc...

10 years ago | 25

| accepted

Declaring 'many' variables from work space into function workspace

Yet another option is to design your function to accept a <http://www.mathworks.com/help/techdoc/ref/varargin.html variable leng...

10 years ago | 0

MATLAB xlswrite function

The reason? Because <http://www.mathworks.com/help/techdoc/ref/xlswrite.html#bsnsz_b-13 the documentation> says so! ;) Excerpt:...

10 years ago | 1

Outputting to string

You can do this using the function <http://www.mathworks.com/help/techdoc/ref/eval.html EVAL>: for i = 1:3 eval(['var_' i...

10 years ago | 2

| accepted

How to solve symbolic system of equations?

Easy, use the <http://www.mathworks.com/help/toolbox/symbolic/solve.html SOLVE> function: >> S = solve(Eqs) S = a:...

10 years ago | 0

| accepted

Need help writing a datacursormode Text Update Function to display high, low, close, date, & volume data as a Datatip on a plot made with the highlow function of the Financial Toolbox.

Since you want your data cursor to display data that is not on the plot, you will have to put that data in a place that the Text...

10 years ago | 2

| accepted

Compute opponent colour of RGB values

If you are talking about a <http://en.wikipedia.org/wiki/Opponent_process color opponent process>, I figured out a simple functi...

10 years ago | 1

How do I skip items in a legend?

Starting in R2021a, you can leave an item out of a legend by setting the corresponding label to an empty character vector. For...

10 years ago | 87

| accepted

Grayscaled Images to RGB

If |img| is your grayscale image, stored as a 2-D |uint8| array, you can create a red version by making |img| be the red color p...

10 years ago | 3

Output of delaunay function

As per <http://www.mathworks.com/help/techdoc/ref/delaunay.html the function documentation>, the matrix |tri| returned from DELA...

10 years ago | 2

| accepted

Working with a three dimensional matrix

If you're asking how you would index |k| in your loop to get a 2-D submatrix, you would do the following: l = k(:,:,i);

10 years ago | 1

clearing an instance of a structure variable

You can remove an element from a structure array the same way you can remove an element from any other type of array: a(1) = ...

10 years ago | 2

| accepted

How to generate symbolic variables dynamically at run-time?

You can generate your system of equations from a matrix of zeroes and ones using just the <http://www.mathworks.com/help/toolbox...

10 years ago | 2

| accepted

Problem saving/loading structure with function handles

In the documentation for <http://www.mathworks.com/help/techdoc/matlab_prog/f2-38133.html#brfp2ff-1 Saving and Loading Function ...

10 years ago | 2

| accepted

How can I find what parameters are in an inline function.

You can use the ARGNAMES function (which is a method for inline objects) to get the arguments of the inline function as a cell a...

10 years ago | 2

| accepted