# Thomas Koelen

### Océ Technologies

Image quality analyst at Océ Technologies Studied Applied Physics in Enschede

**Statistics**

RANK**34**

of 265.024

REPUTATION**5.350**

CONTRIBUTIONS

**12** Questions

**104** Answers

ANSWER ACCEPTANCE **
58.33%
**

VOTES RECEIVED**2.613**

RANK

of 18.105

REPUTATION**N/A**

AVERAGE RATING**0.00**

CONTRIBUTIONS**0** Files

DOWNLOADS **0**

ALL TIME DOWNLOADS**0**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

Writing error in parfor loop

Try writing a function that writes the data, then call this function in your parfor loop.

oltre 7 anni ago | 0

How to scale a dataset to fit an other dataset?

http://nl.mathworks.com/help/matlab/ref/interp1.html

oltre 7 anni ago | 0

Concatenate Columns of Cells

I think this does what you want :) a={'20/7/2014' 0 0; 0 '23/7/2014' 0; 0 0 '26/7/2014'}; j=1; for i=1:size(a,1)*si...

oltre 7 anni ago | 0

ideas to smooth a sharpe corner of a graph?

Maybe construct splines? <http://nl.mathworks.com/help/curvefit/examples/how-to-construct-splines.html> example: x=1:...

oltre 7 anni ago | 1

This question I found in internet please help me to solve this question.

I strongly feel like this is homework.. but: function M_out = odd_index(M) M_out = M(1:2:end, 1:2:end); end

oltre 7 anni ago | 3

| accepted

changing the name of the excel file using ActXserver

You could read the file with xlsread then save it with the name you want with xlswrite <http://nl.mathworks.co...

oltre 7 anni ago | 0

Keep GUI functions running when opening an uigetfile Dialog?

Try calling a function that calls the uigetfile function, maybe this works but I'm not sure.

oltre 7 anni ago | 0

Replace values with specified values

I answered the (somewhat) same question yesterday, this should solve your issue: <http://www.mathworks.com/matlabcentral/answ...

oltre 7 anni ago | 0

Make ifft2 to give real output

use abs() or real()? depending on if you want only the real number or the absolute value.

oltre 7 anni ago | 0

New design of the forum - grey on white / wish list #3 / bug reports

If I scroll down to a topic I have to scroll up all the way to go to the top part of the menu of the website (file exchange, l...

oltre 7 anni ago | 0

findout the second largest element in each row and its location in a matrix

Edit: seems like I misread second largest... , should be ;. A=[1 2 3 4 5; 6 7 9 8 10; 11 12 14 13 15]; [m,i] = max(A,...

oltre 7 anni ago | 0

Obtaining a list of (x, y) points that correspond to specific values of concentration that are chosen at random

clc clear all close all NOP=10; A=rand(52,61,61)*100; B=0; Z=0; while length(B)<NOP X=randi([1 52]); ...

oltre 7 anni ago | 2

| accepted

Is it possible to write several functions into a single m-file?

The first function in an m-file (i.e. the main function), is invoked when that m-file is called. It is not required that the mai...

oltre 7 anni ago | 2

| accepted

I am stuck with inserting data into my MS Access Database. I already converted the data into cell array but it still returns me the error indicating that I am inputting the wrong data type.

Are you sure you already created a database?

oltre 7 anni ago | 0

Matlab jokes or puns

Found in a collegues code: <<http://i.imgur.com/f1fqR9P.png>>

oltre 7 anni ago | 183

Question

Problem with interp1 with data that occurs multiple times

I have two sets of data: NMA = 1.0000 0.9568 0.8540 0.7553 0.6755 0.6031 0.5388 0.4...

oltre 7 anni ago | 0 answers | 0

### 0

answers32 bit exe compilation using matlab 64 installed

As of R2010b, it is possible to compile 32-bit Windows applications using MATLAB on a 64-bit machine. See the -win32 option on t...

oltre 7 anni ago | 0

How to do Design of Experiments with Box-Behnken design with my required levels?

dBB=bbdesign(3); dBB(dBB==-1)=40; dBB(dBB==0)=30; dBB(dBB==1)=0.5; dBB Here you go. Dbb= 40.0000 4...

oltre 7 anni ago | 3

How can I get the interpolated value of and array

interp1(height,distance,heightinput)

oltre 7 anni ago | 1

| accepted

Reorienting Accelerometer data according to gravity

This website explains it very well, also shows some example coding, it's matlab however: <http://balkansoft.blogspot.nl/2012...

oltre 7 anni ago | 0

Creating random circle patterns in an image

Hallo Iris, je kan hier deze functie voor gebruiken. function circle(x,y,r) %x en y zijn de coördinaten vaan het midden ...

oltre 7 anni ago | 1

how to clear axis in for loop?

Why would you use m instead of just using the i you already specified in your for loop? For further work don't use i or j as ...

oltre 7 anni ago | 0

How to compute P.S.N.R value for the below set of images?

If you have the image processing toolbox you can use the function: peaksnr = psnr(A,ref) where A is your output1 and ref...

oltre 7 anni ago | 0

| accepted

what are the different between test data and training data??

In a dataset a training set is implemented to build up a model, while a test (or validation) set is to validate the model built....

oltre 7 anni ago | 1

How did file size change with print(gcf,'-dmeta')?

Try this: [image,path] = uigetfile('*.*'); info = imfinfo(fullfile(path,image)) check the differe...

oltre 7 anni ago | 1

3D histogram of RGB image

<http://nl.mathworks.com/help/stats/hist3.html> Your teacher was right.

oltre 7 anni ago | 0

Clearing the cell array at the end of the loop

At the end of you loop you just put: d={}; Thomas

oltre 7 anni ago | 1

| accepted

Additional text on contour lines

Try using the CLABEL function to get the text object handles and then set the text object "String" property to the text you wa...

oltre 7 anni ago | 0

How to add two images in one, next to each other

Try using montage: <http://nl.mathworks.com/help/images/ref/montage.html>

oltre 7 anni ago | 0