Finding a range in an array
70 次查看(过去 30 天)
显示 更早的评论
I have an array of 8000 values. I want to find a range of particular values say for example the values which are between 20 - 25.6 should be multiplied by -1 but the values should be in changed in the same array. I am currently using a the find nested in an if but somehow I cannot store it in the same array.
采纳的回答
madhan ravi
2019-5-27
编辑:madhan ravi
2019-5-27
idx = (array>=20) & (array<=25.6);
array(idx) = -array(idx)
2 个评论
madhan ravi
2019-5-27
编辑:madhan ravi
2019-5-27
I suggest you to do MATLAB onramp course to cover the basics of MATLAB.
idx = (array>=20) & (array<=25.6); % using this as indices is already much more efficient than find()
indices = find(idx) % this would give you the indices where the condition satisfies
array(2222 : 2245) = - some_number * array(2222 : 2245)
更多回答(1 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!