Rolling-window matrix with different intervals between columns.

Question

farshid balaneji 2018-1-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/377008-rolling-window-matrix-with-different-intervals-between-columns

回答： Jan 2019-6-11

Hi,

I have a vector of data for 21 years with daily data and want to create a rolling window of 365 days such as the next period stars one month (30 days) after the previous one, for example:

vec = [1 2 3 4 5 6 7 8 9 10 11 12 13]

for a given variable n_interval = 3, I want to get a matrix output like:

mat = [[1 2 3 4 5],
       [4 5 6 7 8],
       [7 8 9 10 11],
       [10 11 12 13]]

I looked at this question but couldn't apply it to my problem.

Any help would be appreciated

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Answer 1

Wieszner Vilmos 2019-6-11

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Hi,

I think this is what you are looking for:

https://uk.mathworks.com/help/signal/ref/buffer.html

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Answer 2

Jan 2019-6-11

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https://ww2.mathworks.cn/matlabcentral/answers/377008-rolling-window-matrix-with-different-intervals-between-columns#answer_378708

在 MATLAB Online 中打开

vec = [1 2 3 4 5 6 7 8 9 10 11 12 13];
n      = numel(vec);
step   = 3;
width  = 4;
col1   = 1:step:n - width + 1;
row1   = 0:width - 1;
index  = col1.' + row1;
result = vec(index)