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Akira Agata


MathWorks

508 total contributions since 2016

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Answered
surf plot from text file
Like this? data = dlmread('exportfilecst4.txt'); x = data(:,1); y = data(:,2); z = data(:,6); figure surf(reshape(x,31...

circa 21 ore ago | 1

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Answered
retime only for specific gaps on time
How about the following solution? % Sample timetable with 2 gaps (e.g >1 hour) Time = datetime('now') + minutes(cumsum(45*rand...

7 giorni ago | 2

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Answered
How to assign points to multiple polygons using inpolygon
Looking at your data, one of the Points is outside of the convex hull of polygon A's coordinates. So "inpolygon" function will n...

17 giorni ago | 0

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三角形膜要素の分布図(任意の(x,y)座標で)を作成したいのですが、方法はありませんでしょうか。
ご説明ありがとうございます。おおよそ理解しました。 まず、任意の (x,y) 座​標に対して何らかの値 z (例えば関数 z = f(x,y) の出力値)があったとして、それらの隣接する点どうしを三角形で結んで3次元曲面として表示するには、以下のようにす...

20 giorni ago | 1

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How can I convert multiple images (all the same size) into one matrix?
To create image dataset for training a neural network, imageDatastore should be an easy and promissing way. So I would recommend...

21 giorni ago | 0

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How to stretch matrix
Not so sophisticated, but intuitively clear way: y = repelem(x,2); y(2:2:end) = y(2:2:end)+1;

21 giorni ago | 1

Answered
Trouble importing similar .txt files using readtable (error: all lines must have the same number of delimiters)
I think the following way would be more stable. % Read data fid = fopen('Error.txt','r'); str = textscan(fid,'%s','Delimiter'...

22 giorni ago | 1

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How to detect change in mean value of a signal
It may need to apply "smoothing" before detecting changes larger than 10,000. Looking at your data, ~2000 points movmean will cl...

22 giorni ago | 0

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Checking if word/words are present in a sentence in a table cell.
Like this? % A sample data T = cell2table({... 'M3 TRIPPED xyz','abc','pqr';... 'def','M3 TRIPPED 123','ghi'}); % Fin...

22 giorni ago | 1

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Looking for the ways to categorize the black dots by the number of pixels...
I strongly believe the regionprops function will be your help. The following is an example: % Read image and binarize I = imre...

22 giorni ago | 0

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Answered
積み上げグラフのcolormapについて
たとえば以下のような方法ではいかがでしょうか? % Sample data and color map y = rand(3,10); color = colorcube(size(y,2)); % Visualize the data fi...

24 giorni ago | 1

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Answered
reverse 3D euclidean distance
There should be 2 answers. Here is my try. P = [3 1 4;12 1 4; 34 2 4]; D = [81 36 601]; func = @(x) (vecnorm(x - P(1,:))-s...

28 giorni ago | 1

Answered
エラーバーグラフの凡例のマーカーからエラーバーを抜く方法
エラーバーチャートの上に空のグラフ(エラーバー無し)を上書きして、そのグラフに対して凡例を指定する、というのはいかがでしょうか? 以下はその一例です。 % Sample data x = 1:10:100; y = 100*rand(1,10); ...

28 giorni ago | 2

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Answered
How to repeatedly subdive vector rectangle into equal area?
How about using histogram2 function? The following is an example. % make dummy data x = 10*rand(30,1); y = 25*rand(30,1); ...

29 giorni ago | 0

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Answered
How do you calculate a trajectory through a series of 3D points using cubic splines?
One possible straight-forward way would be like this: Actually, spline interpolation seems to be better than cubic spline... B...

29 giorni ago | 1

Answered
How can I find RGB values of a matrix of coordinates of an image?
Another possible solution: row = round(centers(:, 1)); col = round(centers(:, 2)); R = arrayfun(@(x,y) P(x,y,1),row,col); ...

circa un mese ago | 0

Answered
How can I change the retime function in order to do a median(A,'omitnan')?
How about the following? retime(Liv_dom_an, 'monthly', @(x) median(x,'omitnan'))

circa un mese ago | 0

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Answered
Surface area calculation for irregular shape
How about the following? %% Example in the following page % https://jp.mathworks.com/help/matlab/visualize/visualizing-volume-...

circa un mese ago | 0

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Eye Diagram from text file values
The following is one simple example. I hope this would be some help for your research! % Load PRBS pattern D = dlmread('PRBS_...

circa un mese ago | 0

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How to cluster a network?
How about applying biconncomp function? The following is an example: % Sample Graph s = [1 1 2 2 3 4 4 5 6 6 7 7 8]; t = [2 ...

circa un mese ago | 0

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Binary String Generator With Minimum Distance
How about using BCH code ? Theoretically, BCH(n,k) encoded binary sequences has minimun distance of bchnumerr(n,k)*2+1. So if ...

circa un mese ago | 2

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Answered
How to prevent envelope crossing through function.
That is due to a characteristics of interpolation method (Spline) used in the envelope function. How about detecting peaks and i...

circa un mese ago | 2

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Answered
How to plot intensity profile of an image
Hi Warid-san, You can do it by the same way, like the following. I = imread('Capture.PNG'); % Since size(I,2)/2 = 215.5, I ...

circa un mese ago | 1

Answered
Sorting matrix based on the sum of the rows
Like this? % Read data from CSV A = csvread('Counts.csv'); % Calculate order vector (pt) based on sum(A,2) [~,pt] = sort(s...

circa un mese ago | 1

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Answered
How do I extract particular column from unformatted text in .txt file
As mentioned by many experts, it's better to save as .csv format by wireshark. But if you have to do this task from the text fil...

circa un mese ago | 0

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Answered
regexp: Extract optional named tokens
How about extracting 'Name', 'Gender' and 'ID' one-by-one? The following is an example. % Read the file str = fileread('trip-...

circa 2 mesi ago | 0

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3D Surface or Multiple Line Plots from 16 iterations of 3 column XYZ Data
Like this? data = dlmread('3DDCRXYZ.txt'); g = findgroups(data(:,3)); figure hold on for kk = 1:max(g) idx = g == kk; ...

circa 2 mesi ago | 1

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Answered
I cannot get the output, Image processing
I think several points should be checked: File path in the line 1 is correct? 3rd input argument of imnoise function should b...

circa 2 mesi ago | 0

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How to remove triangles from an image?
How about the following? % Read the original image I = imread('image.jpg'); % Extract orange part (using Color Thresholder ...

2 mesi ago | 0

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Convert distance matrix to a table
Or, if you want the full list of (from, to, distance) set, how about the following? rng('default') % For reproducibility X = r...

2 mesi ago | 0

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