由单一的数字矢量替换整数序列 [英] Replace sequence of integers in vector by single number

问题描述

让 A 整数是载体，其中我想通过一个precise更换次数数字序列。

Let A be vector of integers in which I want to replace a sequence of numbers by a precise number.

示例：

A = [ 8 7 1 2 3 4 5 1 2 3 4 5 6 7 ]

和我要替换的序列 1 2 3 按 9 。

其结果将是：

B = [ 8 7 9 4 5 9 4 5 6 7 ]

任何意见？

推荐答案

这可能是与 strfind 和 bsxfun -

This could be one approach with strfind and bsxfun -

pattern = [1 2 3];
replace_num = 9;

B = A
start_idx = strfind(A,pattern)            %// Starting indices of pattern 
B(start_idx) = replace_num  %// Replace starting indices with replacement
B(bsxfun(@plus,start_idx(:),1:numel(pattern)-1))=[]    %// Find all group
               %// indices of the pattern except the starting indices and
              %// then delete them

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