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Turlough Hughes


Last seen: 1 day ago
159 total contributions since 2019

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Project Euler: Problem 2, Sum of even Fibonacci
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 te...

22 hours ago

Answered
snapshot problem in video processing
snapshot() is intended for use with a cameraboard object or webcam object and you are attempting you input an image object. You...

1 day ago | 0

Solved


Project Euler: Problem 6, Natural numbers, squares and sums.
The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

2 days ago

Answered
How to graph data in cells?
Your data has an empty cell in it so the first step here is to remove that ToBeGraphed(cellfun(@isempty,ToBeGraphed))=[]; % rem...

4 days ago | 0

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Answered
Extract subset of time-curves from a 4D volume
I can reduce this to a single for loop which iterates through the timesteps but i'm not sure about doing this entirely without l...

15 days ago | 0

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Answered
Sum of elements in an array over x
a = [0.023 0.056 0.053 0.034 0.021 0.075 0.088]; result = sum(a(a>0.05))

22 days ago | 1

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Answered
Building a matrix inside a for loop
You could do it as follows: xlsData = xlsread('PartS_all.xlsx'); partID = xlsData(:,4); uPartID = unique(partID).'; % Unique ...

2 months ago | 0

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Answered
how to store coordinate values xy[] for randomly generate point
The format you used (based on the code you provided) is a structure and the format you are looking for is an array. To generate ...

2 months ago | 0

Answered
Multiple combinations of a matrix
Try the following, it should work for any size of M. function x = pairCombos(M) numRows = size(M,1); C = combnk(1:numRows,2...

2 months ago | 0

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Answered
How to reshape in 3D a downsampled matrix
Easiest thing to do would be just this: newData = data(1:factor:end,1:factor:end,1:factor:end);

2 months ago | 0

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Answered
Using a for loop to graph values using different colors
If you want to use scatter so that the color depends on distance, this is how you do it: % Data clear all close all data = [...

3 months ago | 1

Answered
Finding Minimum Distance Between Points to Find Indexed Variable
If you don't have the statistics and machine learning toolbox you can do the following: [~,idx] = min(abs(dtamatrix(:,2) - Feli...

4 months ago | 0

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Answered
Create multiple arrays with different names and specific data
It is possible to do exactly what you asked but that is considered a bad coding practice (explanation here). Why don't you st...

4 months ago | 0

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Answered
Creation of an automatic description image
It looks like you have a binary image but you uploaded it as a .jpeg, I have included 3 lines to "workaround" and get back to an...

4 months ago | 0

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Answered
How to crop a circle from an image?
Try the following tutorial: % Setup clear close all clc inputImg = imread('cameraman.tif'); % Show demo Image hf = figu...

4 months ago | 0

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Answered
calculating area and perimeter for pap-smear image
There are numerous ways you could segment the nucleus, I elected here to threshold based on R,G,B values in the image. To work o...

4 months ago | 0

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Answered
I want to extract values from second column of the matrix which correspond to the range 6 to 7 of the first column. How to do it?
Let's say your matrix is called M, then you can extract rows from column 2 corresponding to those in column 1 which are between ...

4 months ago | 0

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Answered
3-D matrix operations
Here's the method I was suggesting. The idea is to take the first value and add half the difference (effectively interpolating) ...

4 months ago | 0

Answered
Read text file with string
You could use the readmatrix function as follows: filename = 'My2.TXK' opts = detectImportOptions(filename,'FileType','text') ...

4 months ago | 0

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Answered
Extract data (timestamps) from csv file
You could read the file in as a character vector with fileread and then use regexp as follows: filetext = fileread('Info.csv');...

4 months ago | 0

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Answered
How to Interpolated data outliers
Generate some sample data: C = (1:3630).'; idxout = randperm(3630,500); % random index for outliers C(idxout) = C(idxout)+200...

4 months ago | 1

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Answered
matlab code How to dived 400*500 image into 40*50 and calculate object area in each block. put all blocks in one imafe
You can find out which blocks are crops (according to your definitions) as follows: B = blockproc(Img, [40 50], @(block_struct)...

4 months ago | 0

Answered
By using computervision toolbox I'm trying to play a video in MATLAB using this code, but only one frame is displayed on the window
You could do the following: a = vision.VideoFileReader('spur gear.avi' , 'VideoOutputDataType', 'double'); VideoPlayer = visio...

4 months ago | 0

Answered
How can I compare distance (not only between two points, but also a set of points)
As I understand it, you have 10 by 100 points represented in variables X and Y which are both 10 by 100 matrices. A given point ...

4 months ago | 0

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Answered
Simulation Domain (Region)?
I would say what you want is the meshgrid function. Have a look at the <https://uk.mathworks.com/help/matlab/ref/meshgrid.html d...

4 months ago | 0

Question


Is there a property to modify the marker size of a drawline graphics object?
I'm using the drawline function and wondering if it would be possible to modify the marker sizes? If for example we have the fol...

4 months ago | 1 answer | 0

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answer

Answered
How to reshape a single column matrix in the following example?
If you write the following you can directly modify the CT_matrix, no need to separate it out into a column vector: ind_lte_20 =...

4 months ago | 0

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Answered
Take the sum of an array until a limit is reached determined by a vector of the same length
For a single result you could write the following to get the sum for an arbitrary track length of 10 mm, and you have the option...

4 months ago | 1

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Answered
Numbering options in a table
You could change Line 58 to the following: disp(crossSectionInfo.Resistance(str2double(result)))

4 months ago | 0

Answered
I don't get the correct output from my function
The function is correct. However, because this function outputs very large numbers depending on your range (in terms of absolut...

4 months ago | 0

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