Add missing numbers of 0's and 1's in an array
1 回表示 (過去 30 日間)
古いコメントを表示
hello, I have a sequence of 1's and o's values.
Example: I have an 1D array which looks like:
[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]
What I want is to count elements connected to each other and if(mod(elements connected to each other ,10)>5 then add (10-mod) of 1's or 0's
the result can be something like this:
[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0].
1 件のコメント
Walter Roberson
2021 年 9 月 26 日
編集済み: Walter Roberson
2021 年 9 月 26 日
Jan has a File Exchange contribution for Run Length Encoding.
Once you know the counts, it is easy to modify the counts in the data and then ask to do run length decoding.
回答 (2 件)
Walter Roberson
2021 年 9 月 26 日
M = [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];
zstarts = strfind([1 M], [1 0])
zend = strfind([M 1], [0 1])
zlengths = zend - zstarts + 1
ostarts = strfind([0 M], [0 1])
oends = strfind([M 0], [1 0])
olengths = oends - ostarts + 1
if zstarts(1) ~= 1; zlengths = [0 zlengths]; end
runs(1:2:length(zlengths)*2-1) = zlengths;
runs(2:2:length(olengths)*2) = olengths;
mods = mod(runs,10);
mask = mods > 5;
runs(mask) = ceil(runs(mask)/10)*10;
runs
elements = zeros(1,length(runs));
elements(2:2:end) = 1;
newM = repelem(elements, 1, runs);
num2str(newM)
0 件のコメント
Akira Agata
2021 年 9 月 26 日
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-length for each element
idx = diff(x) ~= 0;
idx = [true,idx];
g = cumsum(idx);
group = g(idx)';
element = x(idx)';
lengthIn = accumarray(g',1);
% if mod(length,10)>5, add(10-mod(...))
lengthOut = lengthIn;
idx = mod(lengthIn,10) > 5;
lengthOut(idx) = lengthOut(idx) + (10-mod(lengthIn(idx),10));
% Summarize the result
tSummary = table(group,element,lengthIn,lengthOut);
% >> tSummary
% tSummary =
% 3×4 table
% group element lengthIn lengthOut
% _____ _______ ________ _________
% 1 0 16 20
% 2 1 7 10
% 3 0 8 10
% Then, create the output based on the tSummary
c = arrayfun(@(ele,len)repelem(ele,1,len), tSummary.element, tSummary.lengthOut,...
'UniformOutput', false)
x2 = cell2mat(c');
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Software Development Tools についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!