清空筛选条件
清空筛选条件

find first line that satisfies condition; skip next few; then find next line that satisfies condition

1 次查看（过去 30 天）
Kathleen Hupfeld
Kathleen Hupfeld 2019-3-24
评论： Matt J 2019-3-25
I have a long column of #'s. I want to find and replace values >4.8 with 10000 so that later code can find these spots. This works ok:
stim_time = find(TTL_column>4.8);
TTL_column(stim_time) = 10000;
However, there are ~3-6 points all grouped together that have almost the same time stamp (e.g., 15870,15871,15872,15873). I only want to replace the first one of these with the #10000 (e.g., only the value at 15870 = 10000). I am totally lost on how I'd get this code to replace only the first spot in each group and not the whole group, since each group has an unequal number of points. Any help would be greatly appreciated!
stim_time =
15870
15871
15872
15873
49863
49864
49865
49866
49867

请先登录，再回答此问题。

采纳的回答

Matt J
Matt J 2019-3-24
编辑：Matt J 2019-3-24
idx = diff([0;TTL_column(:)>4.8])>0;
TTL_column(idx) = 10000;
  3 个评论
显示 1更早的评论
Kathleen Hupfeld
Kathleen Hupfeld 2019-3-25
or a way to count how many substitutions were made that's more efficient than this? :)
total = 0;
for i = 1 : length(idx)
if idx(i)==1
total=total+1;
end
end
total

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Programming 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by