# Sven

### University of Michigan

Aussie living in the US. Engineering with MATLAB.

Some Interests:

-3D Volume Processing (CT, mri)

-Finite Element Analysis (human body simulation)

-Geometry Analysis (human body morphomics)

Professional Interests: Image processing, Finite Element Analysis, Human Body Biomechanics

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**17** Questions

**204** Answers

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**Content Feed**

Question

Delete axes interactions not working?

I'm using 2021a and it seems that deleting/disabling interactions isn't working as expected. I'm just trying to either (1) make ...

5 months ago | 1 answer | 1

### 1

answerftlim multiple regression with interaction term

It's a few years late but I think I've discovered the bug that may have been your problem (or at least generates a similar error...

3 years ago | 0

FaceAlpha of bar3 plot smaller than 1 ruins rest of the plot

Hi Sven, We don't have your data (and we don't even know which of your variables are matrices, which are vectors etc.), so we...

5 years ago | 0

how to make cropping for image ?

Hi Eliz, try this: % Read your original image Img1 = imread('http://www.mathworks.com/matlabcentral/answers/uploaded_fil...

5 years ago | 1

how to compare cell arrays of different lengths?

We can start with your input a = int64(1:3)'; out = num2cell(a); b = int64(1:4)'; out2 =num2cell(b); We will pr...

5 years ago | 1

| accepted

how to save all value of centoid of many object from one image ?

The centroid is not a scalar value. It has two components (X coordinate, Y coordinate), so you cannot assign it to a scalar vari...

5 years ago | 0

Question

Save using -append behaves differently when replacing objects vs replacing arrays

Hi all, I'm trying to save some variables to a .mat file, appending to that file if the variable is new, overwriting if it's ...

5 years ago | 1 answer | 1

### 1

answerQuestion

Indexing via 3d array changed behaviour 2015a -> 2015b?

Hi all, just got 2015b, here's a strange one where indexing via a multidimensional array has a differently shaped output to prev...

6 years ago | 1 answer | 2

### 1

answerConvert image into Patches of size 64*64 and get each patch

Hi Tahir, try this: I = imread('rice.png'); imSz = size(I); patchSz = [64 64]; xIdxs = [1:patchSz(2):imSz(2) imSz(...

6 years ago | 2

| accepted

Overlapping region of a single ROI is excluded by the mask

Hi Alessandro, When you say that you _"want to draw a closed ring shape with a single line"_, we might step-by-step reinterpr...

6 years ago | 0

Find strings that contain multiple substrings at the same time

Hi Sven, Here's how I would do it. It uses a call to *regexp* (you could also use *strsplit*) and one *cellfun*. The good thi...

6 years ago | 0

How can I replace a loop with arrayfun - problems with strrep

Hi Sven (congrats on the name), Here's a pretty direct way to do what you're trying to do. It uses regexp once and cellfun on...

6 years ago | 0

| accepted

Question

Fit to just half a parabola

Hi there, I have some simple XY data, and I can fit a quadratic to it as follows: X = [25.4 30.48 35.56 40.64 45.72 5...

6 years ago | 0 answers | 0

### 0

answershow can i remove object bigger than x pixel

Hi Lukasz, Here's an example that removes all objects greater than 1000 pixels in area. You probably have your own *BW* image...

7 years ago | 1

| accepted

Question

getframe difference in 2014b.... bug?

The following code run in 2014a and 2014b produces remarkably different results. I think it's a bug. figure('Position',[100...

7 years ago | 1 answer | 1

### 1

answerQuestion regarding matrix index

Hi jana, Try this: X = [1 2 3 4 5; 3 inf 5 7 inf; 5 6 7 inf inf; 2 3 4 9 1] [val, rowNum] = ...

7 years ago | 0

Get new variable with elements from a double matrix & cell array given a specific condition

Hi Maria, This code should do what you're looking for: A = { '19970102' '00000127' 'MORRISON' '00148' 'BA' '199701...

7 years ago | 0

| accepted

identifying number on dice

Hi Sameer, Here's what I would do. It's a little like IA's bwareaopen suggestion. It tries to make minimal assumptions other th...

7 years ago | 0

| accepted

Please help create a transition matrix

Hi Ella, The code below should do what you're looking for. I displayed the result as an image but you can just look at the fi...

7 years ago | 1

| accepted

Creating an array without mesgrid

You're very close: for i=1:3 for j=1:3 X(i,j)=j; Y(i,j)=i; end end No...

7 years ago | 1

| accepted

Finding signal to noise ratio

Hi Tinkul, does this help you out? I assume that the values you gave are already in your desired units (although true SNR is bas...

7 years ago | 1

| accepted

how to simplify connected blobs

Hi Sukuchha, please see <http://blogs.mathworks.com/steve/2014/03/27/comparing-the-geometries-of-bwboundaries-and-poly2mask/#com...

7 years ago | 0

how to simplify connected blobs

Hi Sukuchha, I think that you just need to do this: XY = [0 0; 1 0; 1 1; 0 1]; % unclosed XY points XY_closed = XY(...

7 years ago | 0

| accepted

How to write a function that returns the element that is the center of a vector or matrix?

Hi Kimberly, try this: % Set up some input x = [1 2 3 4 5 8 1 1 2] % Grab the middle column(s) x...

7 years ago | 1

Output matrix for simple function

Hi Derek, MATLAB has some useful ways to do what you're trying to do. If you use the (.*) operator instead of (*), it will pe...

7 years ago | 0

How can I calculate the perimeters of Delaunay triangles?

Hi ZhG, Here is some code that shows a few different ways of getting the perimeter of triangles. It first just shows the leng...

7 years ago | 1

2D Plotting With Non Numeric X Axis

Hi Dan, Try this code, there's a *dateaxis* command perfect for what you want: xVals = datenum(0,1:12,1); % The first da...

7 years ago | 0

Problem of inserting values into array within a for loop

Hi Kornelia, This one has a straight forward answer. perimeterLength = regionprops(blob, 'Perimeter'); will always re...

7 years ago | 0

| accepted

How can I share image data between callbacks?

Hi Saurabh, This one has a simple solution. Note the call in your first function: handles.pushbutton1 = imread(uigetfile...

7 years ago | 0

Performing stats on subsections of a matrix

Hi Swisslog, Try this: a = [1 1 1 2 2 4; 3 5 4 7 2 5]; % Pack your matrix contents into a cell array [unqA,~,grps]...

7 years ago | 0

| accepted