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# Turlough Hughes

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153 total contributions since 2019

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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 ...

10 días 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 ...

11 días ago | 0

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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...

alrededor de 1 mes ago | 0

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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);

alrededor de 1 mes ago | 0

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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 = [...

alrededor de 1 mes ago | 1

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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...

2 meses ago | 0

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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...

3 meses ago | 0

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Creation of an automatic polyline
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...

3 meses ago | 0

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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...

3 meses ago | 0

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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...

3 meses ago | 0

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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 ...

3 meses ago | 0

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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) ...

3 meses ago | 0

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

3 meses ago | 0

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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');...

3 meses ago | 0

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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...

3 meses 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)...

3 meses 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...

3 meses ago | 0

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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 ...

3 meses 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...

3 meses 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...

3 meses ago | 1 answer | 0

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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 =...

3 meses 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...

3 meses ago | 1

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

3 meses ago | 0

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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...

3 meses ago | 0

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Question

How could I make a callback that updates when the user moves an roi?
I'm making an app which loads and displays the same image side by side in app.UIAxes and app.UIAxes2. I have a rectangle roi obj...

3 meses ago | 0 answers | 0

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Answered
To determine the number of distinct pairs of value(s) in each column of matrix.
You could do the following. First find rows where there is only one other element equal to the element in the first column idx ...

3 meses ago | 0

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Answered
How to print contents of nested cell array to uitable?
I think the best thing to do is make another cell array, B, as follows: nRows = max(cellfun(@numel,A)) nCols = numel(A) B = c...

3 meses ago | 0

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clustering nearest 5 elements of a data
You could do the following which is to find the 5 minimum absolute differences for each element in core. [~,idx] = mink(abs(dat...

3 meses ago | 1

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Answered
Merge all rows in a cell into one row
Similar to numeric arrays writting NewC2LatLon(:) returns all the all elements of the array in a single column. However, I think...

4 meses ago | 0

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Answered
find mean of 2d slice in 3d segmented volume
Ok I think I know what you want. Looking at the documentation for roipoly, I assume you got a binary image representing the regi...

4 meses ago | 0

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