PADCAT

バージョン 1.4.0.0 (3.21 KB) 作成者: Jos (10584)
concatenate vectors with different lengths by padding with NaN
ダウンロード: 14.9K
更新 2018/12/5

ライセンスの表示

編集メモ: This file was selected as MATLAB Central Pick of the Week

PADCAT - concatenate vectors with different lengths by padding with NaN

M = PADCAT(V1, V2, V3, ..., VN) concatenates the vectors V1 through VN
into one large matrix. All vectors should have the same orientation,
that is, they are all row or column vectors. The vectors do not need to
have the same lengths, and shorter vectors are padded with NaNs.
The size of M is determined by the length of the longest vector. For
row vectors, M will be a N-by-MaxL matrix and for column vectors, M
will be a MaxL-by-N matrix, where MaxL is the length of the longest
vector.

Examples:
a = 1:5 ; b = 1:3 ; c = [] ; d = 1:4 ;
padcat(a,b,c,d) % row vectors
% -> 1 2 3 4 5
% 1 2 3 NaN NaN
% NaN NaN NaN NaN NaN
% 1 2 3 4 NaN
CC = {d.' a.' c.' b.' d.'} ;
padcat(CC{:}) % column vectors
% 1 1 NaN 1 1
% 2 2 NaN 2 2
% 3 3 NaN 3 3
% 4 4 NaN NaN 4
% NaN 5 NaN NaN NaN


[M, TF] = PADCAT(..) will also return a logical matrix TF with the same
size as R having true values for those positions that originate from an
input vector. This may be useful if any of the vectors contain NaNs.

Example:
a = 1:3 ; b = [] ; c = [1 NaN] ;
[M,tf] = padcat(a,b,c)
% find the original NaN
[Vev,Pos] = find(tf & isnan(M))
% -> Vec = 3 , Pos = 2
This second output can also be used to change the padding value into something else than NaN.
[M, tf] = padcat(1:3,1,1:4)
M(~tf) = 99 % change the padding value into 99

Scalars will be concatenated into a single column vector.

See also cat, reshape, strvcat, char, horzcat, vertcat, isempty
nones, group2cell (Matlab File Exchange)

引用

Jos (10584) (2024). PADCAT (https://www.mathworks.com/matlabcentral/fileexchange/22909-padcat), MATLAB Central File Exchange. 取得済み .

MATLAB リリースの互換性
作成: R2018a
すべてのリリースと互換性あり
プラットフォームの互換性
Windows macOS Linux
カテゴリ
Help Center および MATLAB AnswersLinear Algebra についてさらに検索
謝辞

ヒントを得たファイル: padadd

ヒントを与えたファイル: CATALIGN, CATX, CATPAD

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
バージョン 公開済み リリース ノート
1.4.0.0

removed some irrelevant code warnings

1.3.0.0

updated description
updated contact info, and update argument checking

1.1.0.0

added help on how to change the padding value using the secondary output

1.0.0.0