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# Joel Handy

##### Last seen: 7 days ago
28 total contributions since 2019

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how to plot all the results of for loop in one figure on same axis?
Just move the figure(); command to before the for loop.

1 year ago | 0

How to flip my image
The are a few problems with your code. First, if you want the image, you dont want to transpose. That will flip and rotate, As...

1 year ago | 0

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How to split an array into smaller unequal-sized arrays dependend on array-column values
Histcounts can be used to pin the data the way you want. [~,~,BIN] = histcounts(mainArray(:,1), 0:10:500) subArray1 = mainArr...

1 year ago | 0

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if statement inside for loop location issues
This is exactly the situation where you want to use logical indexing. https://blogs.mathworks.com/loren/2013/02/20/logical-inde...

1 year ago | 0

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Plotting orientation in 3-D plot using quaternion
Check out this link which explains the quaternion mah required. https://gamedev.stackexchange.com/questions/28395/rotating-vect...

1 year ago | 0

How can i read multiple values in a string?
I believe a regular expression along these lines is what you are looking for. data = regexp('1º:" H:2T:16799C:7| H:2T:16803C:15...

1 year ago | 0

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Surface fitting for 3D point cloud acquired by photogrammetry
Take a look at griddata and scatteredInterpolant griddata Interpolates scattered data - generally to produce gridded data Vq =...

1 year ago | 2

Can this be written in a much better way for fast computations?
The code below will do what you are asking without needing a loop. coast=magic(14400); di_max=100; mx=14400; my=14400; [i...

1 year ago | 1

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How to assign numbers
Something like this? table = randi([0 10],10,10); tableMax = max(max(table)); table(table==0) = tableMax+1; % Or Just table...

1 year ago | 0

How can i do object oriented programming in Simulink?
It sounds like a simple masked subsystem may suit your needs. Its not object oriented programming but you can use it to define ...

1 year ago | 0

How could I extract the first two columns, and leave the next two and then so on from a matrix
% Set up example data set A = eye(100); A(1,:) = 1:100; numCols = size(A,2); % Answer B = A(:,sort([1:4:numCols 2:4:numCo...

1 year ago | 0

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A simple matrix question
A = [1 2 3 4 5]; B = fliplr(A) % Flip matrix in left/right direction A = [1; 2; 3; 4; 5]; B = flipud(A) ...

1 year ago | 0

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how can i convert the ip address into decimal
ipFields = uint8(str2double(split('192.192.192.2', '.')))'; typecast(fliplr(ipFields), 'uint32') % Explanation dec2hex(192)...

1 year ago | 0

unique set from file
c = {'!' 'a:' 'l' 't' '@' [] [] '?' 'a:' 'l' 't' '@' 's' 't' '/' 'a' 'b' 'a' 'n' 'd' 'A~'}; for rowIdx = 1:size(c,1) ...

1 year ago | 0

How to divide a structure into sub-structures based on a condition
I think this is what you are looking for. You will end up with two struture arrays both smaller than the original structure arr...

1 year ago | 0

What are the toolboxes on my license
Just type "ver" to find out what toolboxes you have ver This question has a pretty thorough description of product activation ...

1 year ago | 0

There appears to be two issues with your code. The first is that datetime doesn't take a cell array of numbers so you need to c...

1 year ago | 0

How do I apply unique names to structs created in a for loop?
Does this help at all? I'm not completely sure I understand the nuances of your question, but If I had a folder structure like ...

1 year ago | 0

Finding a max in a column and making all other elements equal to zero
a= [ 1 3 3; 3 1 2; 2 1 1 ] numRows = size(a,1); maxvals = max(a) a(a~=repmat(max(a),numRows,1)) = 0 numNonZeroInCol = sum(...

1 year ago | 0

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Undefined function or variable 'gurobi_write'. in MATLAB R2019a?
I don't know anything about Gurobi, but I do know that in the past, some programs that tie into Matlab need to be installed afte...

1 year ago | 1

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How to select images from nested folder?
Something like this should work. You will possibly need to add code to appropriately sort your list of images. I've marked whe...

1 year ago | 1

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Change the certain element after comparison of two arrays
B = A == 0;

2 years ago | 0

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How do I add an additional column to a cell array based on existing values in another column?
Obviously replace myCellArray with whatever your array is called. isTwo = cellfun(@(x) x == 2, myCellArray(:,2)); myCellArray(...

2 years ago | 0

Remove rows based on length of column value
I think this code will do what you want. It will make a vector with the same number of rows as A, with each element being the nu...

2 years ago | 1

How to plot IMU data (XYZ_AER)?
A quiver plot might help you. it essentially lets you draw vectors in 3D space. https://www.mathworks.com/help/matlab/ref/quiv...

2 years ago | 0

Question

path(pathdef) does not reset the matlab path
I know the question, "How do I restore the Matlab path to it's state at program start up," has been asked a million times and fo...

2 years ago | 0 answers | 0

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Translating points and finding correct normal vector
Sounds like what you really want to do is "shrink" your perimiter. Is that accurate? If so, projecting points back along these...

2 years ago | 0

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Question

How can I easily give all of my simulink random number generators different but controlable seeds?
Simulink random number blocks, as one would expect, output the exact same stream of numbers given the same seed. This becomes p...

2 years ago | 1 answer | 0