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Akira Agata


Last seen: 1 día ago

MathWorks

594 total contributions since 2016

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Answered
Detect the vertical dark layers in greysacale image
By applying findpeaks function (with appropriate option settings) to the average intensity profile, you can detect locations of ...

4 días ago | 1

Answered
Generate a diagonal matrix from the elements of another matrix
I would recommend using diag function. The following is an example: A = [1 2 3 4 5; 6 7 8 9 10]; A = A'; output = diag(...

4 días ago | 0

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Answered
How do you order the results of the combination?
Like this? % Create 1-by-14 cell array {'a','b', ..., 'n'} str = 'a':'n'; c = split(str,'')'; c([1 end]) = []; % Create a...

4 días ago | 1

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Answered
Extract specific rows of a cell
OK. Then, to avoid misunderstanding, let's use a simple example. Say, A is a 1-by-3 cell array and r = 4, as follows: A = {ran...

4 días ago | 0

Answered
How to draw grid lines at specific x- and y-ticks?
How about using xline and yline functions? The following is an example: % Sample plot figure scatter(-1+2*rand(100,1),-1+2*r...

4 días ago | 0

Answered
How display a log space bar figure ?
Please set YScale property of the axes to 'log'. The following is an example. maxV_l = [0.015232 0.020273 0.0069196 0.012027...

4 días ago | 1

Answered
不規則な位置座標に値を格納,プロット
単純に、それぞれのデータ点をnの値に応じた色で表示するには、以下のようにすれば可能です。データ点が十分にあるようであれば、scatteredInterpolant関数で内挿して、等値面などの形で表示するという方法もあります。 figure scatte...

4 días ago | 0

Answered
How to create filename with variable within loop
How about the following? T = readtable('Stations coordinates.txt'); fileName = append('Hourly Data ',T.Station,' 2015.txt'); ...

6 días ago | 1

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Answered
How to replace elements in a integer vector with chars using a lookup table
How about the following way? % Sample data A = randi([0 6],10,1); B = table(compose('Str %d',1:7)',(0:6)',... 'VariableNam...

6 días ago | 0

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Answered
Interpolate 1 array to another
If you don't have the Image Processing Toolbox, interp2 would be your friend, like: % assuming array1 is a 5x9000 numeric array...

10 días ago | 0

Answered
How to replace the empty cells in a cell array by a 4-bits string?
How about the following? load('Key.mat'); idx = cellfun(@isempty,Key); % Find the indexes of empty cell Key(idx) = {'0000'}; ...

10 días ago | 1

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Answered
merge values of a vector
Like this? x = 1:4; % sample input array s = num2str(x,'%d'); y = str2double(s); >> y y = 1234

10 días ago | 1

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Answered
writing in a pre-existing txt file ?
Assuming the pre-existing text file is data.txt, how about the following? cInput = readcell('data.txt','Delimiter','\n'); cA...

14 días ago | 0

Answered
How can I extract the harmonic related numbers from a matrix?
How about the following? x = [90 100 110 200 220 250 300 330 340 400 420 500]; tfUsed = false(size(x)); R = x./x'; idx = R...

14 días ago | 0

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Answered
Machine Learning Signal Processing Help
I believe one good starting point would be descriptive statistics listed in this page (Signal Processing Toolbox), or Diagnostic...

14 días ago | 0

Answered
splitting dataset into training set and testing set
You can split your dataset by using partition function, like: [setTrain, setTest] = partition(faceDatabase, [0.8, 0.2], 'random...

14 días ago | 0

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Answered
how to create multiple matrix from a single matrix
If you have Image Processing Toolbox, how about the following? % Sample data A = [... 1 2 3;... 4 5 6;... 7 8 9;... ...

23 días ago | 0

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Answered
change color of outlier limit in box plots
How about the following solution? % Sample data x = randn(1000,4); % Create boxplot without outlier markers figure boxplo...

25 días ago | 0

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Answered
how do I add msec to datetime?
Please set the display format to show millisecond, like: >> Ts.Format = 'uuuu/MM/dd HH:mm:ss.SSS'; >> Ts Ts = datetime ...

alrededor de 1 mes ago | 0

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Answered
How to replace elements of matrix by elemts from array
Basically, this task can be done by: NewV = reshape(x,8,[])'; But in your case, length(x) can NOT be devided by k (=8). So you...

alrededor de 1 mes ago | 0

Answered
ファブリペロー干渉計について
初期パラメータを以下のように想定して計算したところ、波長によっては透過率(=出力光電力/入力光電力)が 1 を超えるという結果になっています。記載頂いた式のどこかに誤りがあると思われますので、再度ご確認頂けないでしょうか。 % 設定パラメータ Rx =...

alrededor de 1 mes ago | 3

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Answered
Overlay curves over heatmap
How about the following way? Plot the heatmap Add axes over the heatmap Plot lines on the axes Set the background color of t...

alrededor de 1 mes ago | 1

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Answered
Simplifying an array with repeat values in it
How about the following? load('data.mat'); [g,tbl] = findgroups(data(:,{'partnumber','description'})); QYT = splitapply(@sum,...

alrededor de 1 mes ago | 0

Answered
Error in the medical image display
How about the following? imshow(T_1,[]); In addition, I believe the line 'T_1 = squeeze(C);' can be deleted.

alrededor de 1 mes ago | 0

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Answered
plotting date from datetime array
'Y' should be a captal letter. Please try: histogram(d.Year)

alrededor de 1 mes ago | 0

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Answered
to determine rainfall data
I would recommend using timetable and retime functions, rather than using for-loop. The following is an example: % Read data ...

alrededor de 2 meses ago | 0

Answered
Cycle counting from 0
How about the following? x = [0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0]; str = num2str(...

alrededor de 2 meses ago | 0

Answered
How to fit an ellipse to an image in matlab.
How about the following? % Read image I = imread('diskimage1.jpeg'); % Binarize Igray = rgb2gray(I); BW = imbinarize(Igra...

alrededor de 2 meses ago | 0

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Answered
Changing gregorian date number to calendar date and time
If your time vector represents hours since 1900-01-01 00:00:00.0 , following code can convert it into yyyy-MM-dd. T = datetime...

alrededor de 2 meses ago | 1

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Answered
特定の文字を抽出してプログラムを制御する方法と、テーブルに複数の単語を格納する方法についてご教授お願いいたします。
前回に引き続き、ちょっと面白そうなので少し考えてみました。 ざっと以下のようなプログラムになるかと思います。 ご質問の2点については、コメント欄に「★」をつけた部分になります。参考になれば幸いです。 % テーブルd(ictionary)の作成 T_...

alrededor de 2 meses ago | 1

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