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Akira Agata

MathWorks

Last seen: Today |  Active since 2016

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Answered
Bit Error Rate (BER) performance of different digital modulation schemes such as Binary Phase Shift Keying (BPSK),
I believe the following documentation page would be help: https://jp.mathworks.com/help/comm/ref/berawgn.html

ungefär 7 timmar ago | 0

Answered
Add missing numbers of 0's and 1's in an array
How about the following? % Sample data x = [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0]; % Calculate run...

en dag ago | 0

Answered
Read csv-style file with header and subtitle
How about the following solution? T = string(readcell('tableExample.csv'));

3 dagar ago | 0

| accepted

Channel


Data

13 dagar ago

Answered
What methods can be used for lossless audio compression?
I believe the most simplest way to save data as a lossless audio file using MATLAB is audiowrite. This function can save data a...

16 dagar ago | 1

Answered
get the distances between points
How about the following solution? load('xy_coordinate.mat'); % Calculate distance between each node D = pdist(xy); % Con...

16 dagar ago | 2

| accepted

Answered
How to export array elements?
How about the following? A = (1:20)'; N = numel(A); idx = mod(0:N-1,10)' <= 1; X = cell(5,1); for kk = 1:5 X{kk} = A...

24 dagar ago | 0

| accepted

Answered
char array to pick
The solution should be: b = a(:,2:3);

2 månader ago | 0

| accepted

Answered
Help with findgroups command
Like this? a = {... 'apples' 1 2;... 'orange' 2 3;... 'apples' 3 4;... 'Pear' 4 5;... 'apples' 5 6;}; % Ext...

2 månader ago | 0

| accepted

Answered
List of Node pairs
Another possible solution: numNode = 4; [r,c] = find(~eye(numNode)); v = [c,r]; >> v v = 1 2 1 3 ...

2 månader ago | 1

| accepted

Answered
cell配列内の特定の行を取り出し，それらの行を一つのcell配列にまとめることはできますか？
対象の cell 配列を C1 とすると、以下のようにして抽出可能です。 idx = cellfun(@(x) x == 4, C1(:,3)); C2 = C1(idx,:);

2 månader ago | 0

| accepted

Answered
テーブルと構造体の結合
変数 B が数値配列ということでしたら、array2table で table 型に変換できます。 T = [A, array2table(B)];

2 månader ago | 1

Answered
Trying to set Y-Axis to Minutes:Seconds for swim times. Would like to set range from 0 to 3:30 and eliminate leading zeros
How about the following solution? % Sample data t = 0.25+3*rand(100,1); % Create boxplot figure boxplot(t) d = 0:0.5:3.5...

3 månader ago | 0

Answered
plotting bar graph using matlab
How about using a stem plot? The following is an example: tt = readtimetable('data.txt'); figure stem(tt.Time, tt.Var1,'Ma...

3 månader ago | 1

| accepted

Answered
How to find local peaks in a 3D plane
How about the following? % Load data load('positionsplane.mat'); % Arrange it as a table variable tData = array2table(posi...

3 månader ago | 0

| accepted

Answered
Linear Interpolation hard task
As @Walter Roberson -san suggested, timetable and retime is the best solution. Please try the following: TT = readtimetable('_s...

3 månader ago | 0

Answered
How can I extract unique pairs of matrix in reverse order?
How about the following way? A = [... 1 1 2;... 2 1 4;... 3 2 1;... 4 2 3;... ...

3 månader ago | 0

Answered
findpeaks関数を使って暗い画像の中に存在する広がりのある輝点を検出したいのですが、方法はありますか？
試しに簡単なプログラムを作成してみました。行方向と列方向でピークを検出してプロットすると、検出されたピーク点は輝点の上に十字型に表示されます（右図）。ただ、輝点内の輝度分布によっては十字の縦と横の線がきれいなラインにならない場合や、中央でクロスしない場合な...

3 månader ago | 1

Answered
findpeaksの閾値設定について
@Ibuki Takahashi さん、ご説明ありがとうございます。 「xの値の範囲が10以下の時」という条件を、「ピークの半値全幅 (FWHM: Full Width at Half Maximum) が 10以下の時」と近似的に読み替え可能でしたら、...

4 månader ago | 1

| accepted

Answered
Reed Solomon encoding/decoding for binary data
Since RS system object has 'BitInput' option, I would recommend using comm.RSEncoder rather than rsenc if you want to evaluate F...

4 månader ago | 1

| accepted

Answered
How to quickly find out the repeat integers in an array?
I believe it's time to use accumarray function! How about the following? A = [4 20 5 4 7 5 9 5 31]; B = accumarray(A',1); ...

4 månader ago | 0

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Answered
8 - bit linear feedback shift register
How about using comm.PNSequence in Communications Toolbox?

6 månader ago | 0

Answered
基準値の倍数に....
以下のような処理ではいかがでしょうか？ c = 0.3; % 基準値 inValue = 5*rand(10,1); % 切り上げ／切り捨て前の値 outValue = c*round...

6 månader ago | 0

Answered
Errors in transfer learning using resnet101
Since ResNet-101 is imported as a DAGNetwork object, the following steps will be needed (more details can be found in this Link)...

6 månader ago | 2

| accepted

Answered
Read a 55x55 matrix with matlab
How about the following? A = readmatrix('Averaging_kernel_MLS_v04_0N.txt'); A = reshape(A',60,[])'; A = A(:,1:55);

7 månader ago | 0

Answered
グラフの目盛りを片方だけ非表示にする方法
box off と設定したときに表示されるプロットのようなイメージでしょうか？ figure plot(magic(4)) box off

8 månader ago | 0

Submitted


MATLABによる予知保全のデモ
データをもとに異常状態を検出する手法として、これまで様々な手法が提案されています。そのなかでも、多次元データの中から「教師なし」で異常を検出する手法は実用上とても重要な手法です。本デモでは、代表的な「教師なし」の異常検出アルゴリズム3つをご紹介します。

8 månader ago | 1 download |

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Answered
特定の範囲における二値化について(初心者です)
以下のような処理になるかと思いますが、いかがでしょう？ % グレースケール画像を準備 I = imread('cameraman.tif'); % 幅の半分、閾値1、閾値2を準備 wHalf = round(size(I,2)/2); th1...

8 månader ago | 0

| accepted

Answered
構造体配列の並び替え (降順)
struct2table 関数でいったんテーブル型変数に変換して、sort 関数でソートしたうえで再び table2struct 関数で構造体配列に戻す、という方法ではいかがでしょうか？

9 månader ago | 0

| accepted

Answered
空行列の判定方法
以下の方法ではどうでしょうか？ % 例として、A(1,2)とA(2,1)がカラのセル配列を作成 A = cell(2,2); A{1,1} = rand(2); A{2,2} = rand(2); % カラのセルのインデックスを取得 idx...

9 månader ago | 0

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