# Ryan

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Aspiring bioengineer with an interest in image processing.

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Fitting data with two peaks

You could get a close approximation of peak position with a cubic spline fit and local maxima. You could also try just smoothin...

mer än 9 år ago | 0

[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)

Perhaps there is a method of which I am not aware, but I would like to be able to track questions that I commented on and not ac...

mer än 11 år ago | 2

Finding pixels in connected component

It sounds like you are looking for a perimeter of a shape as the "bounding box." If so, use <http://www.mathworks.com/help/imag...

mer än 11 år ago | 0

array: concatenate two columns of integers to one colum

A = [1234, 567; 1, 234]; %Sample Data % Figure out how many spaces to shift the left column C = ceil(log10(A(:,2))); ...

nästan 12 år ago | 0

How can I fill the area between two curves other than facecolors

Check out the <http://www.mathworks.com/matlabcentral/fileexchange/1736-hatched-fill-patterns "Hatched Fill Patterns" FEX Submis...

nästan 12 år ago | 0

| accepted

combining number of images using matlab

See the <http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F Matlab FAQ>.

nästan 12 år ago | 0

how to determine the best tangential at every points from a freehand line?

I have been struggling with a related issue myself as of late. I settled for sampling the image with a small window and usi...

nästan 12 år ago | 0

Dividing the pixel into blocks

Do you have the image processing toolbox? This should get you started down the right path: * <http://www.mathworks.com/produ...

nästan 12 år ago | 0

Question

BWDIST label matrix not returning expected labels

I am trying to use the label matrix feature of |bwdist|, but am encountering a problem. *Instead of returning the linear index ...

nästan 12 år ago | 2 answers | 0

### 2

answersHow to store different # of values, obtained in iterations, in Matrix / array ?

<http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F FAQ> I think I deciphered your...

nästan 12 år ago | 0

Cody: Problem 30 - function Sortrows

You were taking the complex conjugate of |z|. Be careful whenever you use |'| to transpose in Matlab! function z = complex...

nästan 12 år ago | 1

| accepted

Boundary of an image

Utilize the matlab function <http://www.mathworks.com/help/toolbox/images/ref/regionprops.html |regionprops(...,'MajorAxisLength...

nästan 12 år ago | 0

Mapping colored image on grayscale

I = imread('Brain.jpg'); Tumor = imread('Tumor.jpg'); ThresholdValue = 10; % You'll want to find the best value mas...

nästan 12 år ago | 1

rows which do not contain zero

row_numbers = find(sum(A,2) ~= 0); number_of_rows = numel(row_numbers);

nästan 12 år ago | 0

i can't uderstand the image blurring in following code....what does the following blurring filter do? how does it work?

I believe your unblurred is your expected blurred, and your blurred is actually the frequency domain for the blurred image. The ...

nästan 12 år ago | 0

How to create a loop calcualtion?

So you have a 1 x 20 vector you want to fill off of knowing just the first value and each previously value determines the next? ...

nästan 12 år ago | 1

find out the orientation, length and radius of curved rectangular object

Have you looked at MF <http://www.mathworks.com/help/toolbox/images/ref/regionprops.html regionprops()>?

nästan 12 år ago | 0

Code of plotting from SCOPE three axis to sublots

This is not writing all the code for you, but this should hopefully help. Your error seems to be in how to access the informati...

nästan 12 år ago | 0

Question

Indexing points along curve in matrix in order from one endpoint to the other

I have a logical image with many 1-px wavy curve segments and I am trying to fit a curve to these segments to find the orientati...

nästan 12 år ago | 2 answers | 0

### 2

answersHow can I sort a string both alphabetically and numerically?

<http://www.mathworks.com/matlabcentral/fileexchange/7212-asort-a-pedestrian-alphanumeric-string-sorter FEX Submission "ASORT: A...

nästan 12 år ago | 1

how do you make an array with letters

letters = 'A':'P'; % According to this nifty iPhone Matlab Mobile app

nästan 12 år ago | 0

Classification of Brain tumor

In addition to IA's answer, this seems to be a question requesting a novel idea of how to differentiate tumor types accurately u...

nästan 12 år ago | 1

How can i write the frequency vector for frequency range 5-400 hz using 50 frequncy points

|FrequencyVector = linspace(5,400,50); %linspace(min,max,# of points)|

nästan 12 år ago | 0

Help splitting blobs that contain overlap in an image

A sample image may result in better answers if you can provide one. It sounds like you'll need to use a watershed techniq...

nästan 12 år ago | 0

Is code formatting still too complicated

I would recommend implementing an "open code" and "close code" tag system similar to the other features in the comment section |...

nästan 12 år ago | 1

Get the index for the search of multiple strings within an array of strings

Is this what you were looking for? list = {'bad','worse','good','okay'}; badlist = {'bad','worse'}; idx = ismember...

nästan 12 år ago | 2

Add new column a vector.

x = [0;0;2;2;1;0;0;2;0]; y = [43;43;34;34;34]; Combined{1} = x; Combined{2} = y; You need to use cells |{}| in order...

nästan 12 år ago | 0

| accepted

How can I create a 16'' by 3.5'' rectangle centered on a 11'' by 17'' paper?

Use |<http://www.mathworks.com/help/techdoc/ref/rectangle.html rectangle('Position',[x,y,w,h])>|. I am assuming the reason ...

nästan 12 år ago | 0

how to generate function of an ellipse?

There is a function to draw such an ellipse in Matlab if you have the PDE toolbox, |<http://www.mathworks.com/help/toolbox/pde/u...

nästan 12 år ago | 1

| accepted

Assistance with creating multidimensional matrices

I would pre-allocate A before the for loop by using A = zeros(Rows,Cols); %Creates matrix of 0's % This will also act to c...

nästan 12 år ago | 0

| accepted