# Thomas

Love MATLAB :)

Work with Wireless Sensor Networks, Medical Image processing (MRI,fMRi,DTI), High Performance Computing at UAB

Professional Interests: Parallel Computing, Supercomputing, Wireless sensor networks

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**Content Feed**

Storing values from nested FOR loop (array only saves last run of results)

for i=1:4 for j=1:3 answerA(i,j)=i*1; answerB(i,j)=j*10; % tableA(i,:)=[answerA answerB] ...

ungefär 3 år ago | 6

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how to find out if a number is even or not

You could perform a modulo division mod(4,2) % Even number ans = 0 mod(5,2) % Odd number ans =1 Answer wi...

ungefär 3 år ago | 10

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Counting objects in an image

You could use techniques shown in many MATLAB image processing demos.

ungefär 4 år ago | 0

how to save a string as a filename?

Maybe something like this for number=1:10 file_name = sprintf('case study_#%d.txt',number); save(file_name,....

nästan 5 år ago | 3

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Distributed and parallel computing without DCS

Hi Chuck, In order to perform distributed computing across multiple computers you need the DCS license. We have DCS running ...

mer än 6 år ago | 1

Creating sub-matrices using one matrix

Look at the examples given here <http://stackoverflow.com/questions/13091193/how-to-select-a-submatrix-not-in-any-particular-pat...

mer än 7 år ago | 0

matrix generation 1 to n*n or interval

n=10; a=1:n*n; out=reshape(a,n,n)'

mer än 7 år ago | 2

Finding structure array entries with certain values

You could use something like this strs={'1' '2' '3' '4'} ind=find(ismember(strs,'4')) >> ind = 4

nästan 8 år ago | 0

Datenum: how many seconds in a day?

IF my guess is right matlab considers every day as 86400 seconds.. only in leap years does datenum make sure an extra day is add...

nästan 8 år ago | 1

Not enough input arguments

Are you giving it u as an array? try running it like this.. works fine.. u=1:5; cost_function(u) output is J =...

nästan 8 år ago | 0

Delete duplicate rows from a large cell array

wit_dup={'2000-01-10 1:00' 'HCM' '268' '20' '260' '2345' '0' '90' '2000-01-10 1:00' 'HCM' '268' '20' '260' '2345' '0' '...

nästan 8 år ago | 0

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Is it possible to save . mat <4095x1384x2 double> file to txt file?

You can save it as slices data1=data(:,:,1); data2=data(:,:,2); and then save or he alternative would be to use resha...

nästan 8 år ago | 0

How to read DICOM RT Structure?

Might want to try <https://github.com/ulrikls/dicomrt2matlab> or try RSInfo=dicominfo('RS.ZZ_YUNINN_.dcm'); dicom...

nästan 8 år ago | 4

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İ need to switch red and blue colors in RGB picture. How i can do that? my version of matlab is R2013a

Similar question: <http://www.mathworks.com/matlabcentral/answers/100476> or ii=imread('1.jpg'); % load original ...

nästan 8 år ago | 1

Doing a plot within a FOR LOOP

some thing like this? clear for i = 0.04 : 0.01 : 0.06 B = -20000 + 57300*((1+i)^-20) figure() ...

nästan 8 år ago | 1

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How can I make subplots larger?

Do you just want to make the figure taller? x=1:10; y1=x.^0.5; y2=x; y3=x.^2; y4=x.^3; figure1=fig...

nästan 8 år ago | 4

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

acker is the old pole placement function using Ackerman's formula from the control system toolbox.. try which acker ...

nästan 8 år ago | 0

can anyone provide me the code for motion detection in a video????????

Many of them are available in file exchange <http://www.mathworks.com/matlabcentral/fileexchange/18151-motion-detection-in-a...

nästan 8 år ago | 1

how to get average of more than one (atleast 2288) images?

An example is given here <http://stackoverflow.com/questions/5689639/how-to-average-multiple-images-in-matlab/14222792#14222792>...

nästan 8 år ago | 0

How to use parfor for fast matrix calculations with different dimensions???

You do not need to use 'parfor' or even 'for' to get to what you are trying (i.e. find 1's in the matrix). Is there a specific r...

nästan 8 år ago | 0

Is it possible to downgrade MATLAB?

You should get access to earlier releases if you buy a current license. Mine shows me as far back as R11.1 available for downlo...

nästan 8 år ago | 0

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swap columns of a matrix

You could also use out= fliplr(k_minus) This flips the matrix left-right <http://www.mathworks.com/help/matlab/ref/fliplr...

nästan 8 år ago | 2

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I'm trying to make a function to create a chirp signal with a clip distortion, when I run the function, It won't play and just displays columns, where is the problem?

run your code as follows a=SignalGen(10,200,1000,5,3,100); % suppress output Signal sound(a) % to hear

nästan 8 år ago | 0

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Surface area of a 3D-plot from a matrix.

I do not think MALTAB has a built-in function. (I might be wrong though) However a similar question has been answered here <ht...

nästan 8 år ago | 1

how to find elements in an array

x = 1:100; y = 201:300; a=[ 215 250 283]; c=ismember(y,a) x(c) should give you 15 50 83

nästan 8 år ago | 1

feval(symengine, 'partfrac' command error

You forgot the * between 14 and x feval(symengine, 'partfrac', 4/ (((x - 7)^2 + 4^2 )* (x^2+14*x + 65)))

nästan 8 år ago | 1

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How to change Elements in Matrix per row depending on their size in reference to a particular Element (without loop)

A laborious way of doing it.. B=[A(1,:);A(3,:);A(4,:)]; B(B >=3)=3; C=[A(2,:);A(5,:)]; C(C >=2)=2; Out=...

nästan 8 år ago | 0

How do I reshape a dataset?

a= rand (2,4) size(a) b=a' size(b) Is this what you are looking for ? or b= reshape(a,4,[]); ...

nästan 8 år ago | 0

How to add a folder permanently to matlab path?

You can put the addpath statement to startup.m Heres how to create startup.m <http://www.mathworks.com/help/matlab/ref/startu...

nästan 8 år ago | 2

| accepted