How to take the maximum value of an array?

2 次查看(过去 30 天)
Hi, I have this array a = [1:20]. How do I take the maximum value of every 5 elements of it. So I will have b = [5 10 15 20]. Anyone can help me? Thank you.

采纳的回答

Star Strider
Star Strider 2015-2-25
This works:
a = [1:20];
b = max(reshape(a, 5, []));
  6 个评论
arina octave
arina octave 2015-2-25
and I'm truly amazed with your answer.. aaa thank you so much Star Strider!

请先登录,再进行评论。

更多回答(1 个)

Greig
Greig 2015-2-25
Try something like this...
a=1:20;
steps = 5;
b = NaN(mod(length(a)/steps,steps), 1); % preallocate b for speed, if you want to run larger loops
count = 1; % an index count for b in the loop
for ii = 1:steps:length(a)-(steps-1)
inds = ii:ii+(steps-1); % The indices we are interested in
b(count) = max(a(inds)); % Get the max
count = count+1; % add 1 to the counter
end
  1 个评论
arina octave
arina octave 2015-2-25
hi, thank you for kindly answer my question. but what i want is the x axis of signal b exactly like the x axis of signal a. do you have any idea how to do that? thank you...

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Matched Filter and Ambiguity Function 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