Answered
time series fatigue test
How about the following? N = [1000 , 500 , 2000 , 300 , 700 , 1000]; % No of samples NI = length(N); y_min = 10 + (60-10)*r...

6 years ago | 0

Answered
Plotting an array of string as X-axis and an array of numbers as y-axis?
Assuming your data was stored in the attached format, I think there should be at least following 2 solutions: % Read data data...

6 years ago | 0

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How can I edit a value in multiple text files?
I believe it's better to keep the original files and save the revised files to a different folder. How about the following? In...

6 years ago | 0

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Adding two arrays of different sizes together evenly without messing cumulative sum.
Based on the question, C should be a cumulative result starting from 0. So, it should be: C = A + linspace(0,B,length(A));

6 years ago | 0

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Answered
grouping numbers in matrix
More generalized solution would be: C = splitapply(@(x){x'}, B, A); If each group has the same number of elements, the followi...

6 years ago | 1

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Answered
how to multiply a number in even rows of matrix?
Please try the following: output2(:,2:2:end) = 2;

6 years ago | 0

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Answered
4d plot in order to create a surface with density from 4 vectors ( coordinates of the dots). X, Y, Z and C is the color.
OK. Then, how about the following? % Load data load('object.mat') % Create meshgrid [xq, yq, zq] = meshgrid(min(x):5:max(x...

6 years ago | 2

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Answered
4d plot in order to create a surface with density from 4 vectors ( coordinates of the dots). X, Y, Z and C is the color.
How about simply using scatter3 function, like: load('object.mat') figure scatter3(x,y,z,[],c,'.') colorbar

6 years ago | 1

Answered
regionpropsの応用について。
bwboundaries 関数を使うのはいかがでしょうか？たとえば以下のようにオブジェクトの境界をトレースできます。 % Sample binary image I = imread('toyobjects.png'); BW = ~imbina...

6 years ago | 2

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ignore or delete number or row has been multiply defined?
Simple solution will be: result = unique(yourArray); If you want to keep element's order, please try the following: [~, ia] =...

6 years ago | 0

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Answered
Timetable Monthly Average over Many Years
Looking at your csv data, some additional options will be needed. (1) To specify the delimiter in your csv data, 'Delimiter' op...

6 years ago | 1

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change numbering inside cell
Solution 1: c_new = cell(size(c)); for kk = 1:numel(c) c_new{kk} = interp1(B(:,2),B(:,1),c{kk}); end Solution 2: % "...

6 years ago | 0

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Answered
Extract integer number from a cell array.
If my understanding is correct, you are trying to extract numbers just after 'BUS'. If so, how about the following? % Original...

6 years ago | 0

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Answered
Graph each side of the equation
How about using fzero function? The following is an example: % fnc = (left side) - (right side) fnc = @(x) 4.231*x - exp(-0.17...

6 years ago | 1

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How can I set a descend order finding peaks to my graph ?
How about combining envelope and findpeaks functions? The following is an example. % Load data load('signal.mat'); load('t.m...

6 years ago | 2

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Answered
How to take monthly flow data and obtain annual max flow values
Assuming your data was stored in 972-by-2 matrix yourData, following code can do your task. year = repelem([1:81]',12,1); year...

6 years ago | 0

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Remove the border lines.
How about using surf function with 'FaceColor' = 'interp' option, instead. Here is an example. figure surf(xx1,yy1,z1,'FaceCo...

6 years ago | 1

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how to count daily events from a time series data
How about the following? % Read your text data file T = readtable('test.txt'); % Create datetime vector Time = datetime(T....

6 years ago | 0

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Extracting coordinates values for the line.
How about the following? % Load data and convert to gray-scale image load('v.mat'); Igray = mat2gray(v); % Apply multileve...

6 years ago | 0

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Answered
Kmeans (Initialise centroids)
Like this? % Apply k-means clustering to data set X (e.g num of classes = 2), and obtain centroids C numClass = 2; [cluster,C...

6 years ago | 0

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plotを使った四分木分割をしたいです。
Image Processing Toolboxの関数 qtdecomp を使うのはいかがでしょうか。以下はその一例です。 % 与えられた(x,y)座標が1(他は0)の16x16配列Iを作成 a = [2 2; 7 2; 3 7; 6 6; 8 9...

6 years ago | 1

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Answered
connect median in a boxplot
Like this? % Sample data Data = randn(100,10); % Calculate median for each column med = median(Data); % Visualize the r...

6 years ago | 1

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Answered
Return index of datetime column in a table
If your HData.Time column is string: % index of zero seconds idx_s = cellfun(@(x) ~isempty(x),regexp(HData.Time,'00$','match')...

6 years ago | 0

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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...

6 years 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...

6 years 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...

6 years 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...

6 years ago | 1

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Answered
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...

6 years 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;

6 years ago | 1

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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'...

6 years ago | 1

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