How can I split an array into equal overlapping sub-arrays?
18 次查看(过去 30 天)
显示 更早的评论
How can I split an array into equal overlapping sub-arrays?
Simple example where the array divides evenly without any need for overlapping
ArrayX = 1:160;
ArraySplitSize = 4
Result is
1:40, 40:80, 80:120, 120:160
Example where overlapping is needed. I want to keep full size of the array and not cut off anything at the end.
ArrayX = 1:100;
Subarray = 40;
ArraySplitSize = 3;
Result is 1:40, 30:70, 60:100
3 个评论
Kelly Kearney
2020-4-10
Also, what's the rule you used to decide which of the overlapping blocks get shorted when the array isn't evenly divisible? E.g. in your latter example, you indicate subarrays of length 40, 41, and 41. Also, in your first example, you listed values with overlaps; I assume that should be 1:40, 41:80, 81:120, and 121:160, right?
采纳的回答
Walter Roberson
2020-4-10
If you have the Communications Toolbox, the easiest approach is to use buffer() and take the columns of the resulting matrix. buffer() already has logic for overlapping windows built in. Otherwise,
bufflen = length(buffer);
advance = window_size - overlap;
starts = 1 : advance : bufflen;
ends = min(starts + window_size - 1, bufflen);
result = arrayfun(@(S,E) buffer(S:E), starts, ends, 'uniform', 0);
This uses a strictly uniform size. The last few entries might be shorter.
3 个评论
Walter Roberson
2020-4-10
bufflen = length(ArrayX);
starts = floor(linspace(1, bufflen-Subarray+1, ArraySplitSize));
ends = starts + Subarray - 1;
result = arrayfun(@(S,E) ArrayX(S:E), starts, ends, 'uniform', 0);
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Hamming 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!