Decrease a size of matrix using interpolation

4 次查看（过去 30 天）
Ozan Carikci
Ozan Carikci 2021-1-31
回答： Mathieu NOE 2021-2-1
Good evening everyone,
I have a matrix with 108064 x 2 size. I want to decrease its size to aproximately 2000 using interpolation. Thus, if we consider this matrix as cells and my plan is to see every 64 data like one data with using interpolation and it is going to be around 1600 cells. How can i implement it on Matlab. Thank you. Sincerely...
  2 个评论
John D'Errico
John D'Errico 2021-1-31
That is not interpolation, but a downsizing. It sounds like you just want to average every 64 elements, a far different thing than interpolation.
Ozan Carikci
Ozan Carikci 2021-1-31
Yes i want to take average of every 64 elements, how can i do downsizing on a matrix 108064 x 2 size?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Mathieu NOE
Mathieu NOE 2021-2-1
hello
demo with a simple for loop :
% dummy data
VectorTime = rand(5000,2);
buffer = 64; % nb of samples for averaging
% zero overlap mean averaging
[m,n] = size(VectorTime)
for ci=1:fix(length(VectorTime)/ buffer)
start_index = 1+(ci-1)*buffer;
stop_index = min(start_index+ buffer,length(VectorTime));
time_index(ci) = round((start_index+stop_index)/2); % time index expressed as sample unit (dt = 1 in this simulation)
avg_data(ci,:) =mean(VectorTime(start_index:stop_index,:)) %
end
figure(1),
plot(time_index,avg_data);

类别

在 Help Center 和 File Exchange 中查找有关 Interpolation 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