Write a self contained program which will take a signal and compute its Cosine transform

1 回表示 (過去 30 日間)
Amy Peters
Amy Peters 2016 年 4 月 18 日
回答済み: Walter Roberson 2016 年 4 月 18 日
I'm new to MATLAB and was wondering if anyone could help me with this problem? I don't know where to start.
Write a self contained program which will take a signal and compute its Cosine transform. Have the program decide how many significant coefficients are necessary for a given input tolerance (such as .01, or .001).
  2 件のコメント
Amy Peters
Amy Peters 2016 年 4 月 18 日
I think I'm allowed to use the "built-in functions" in this question. I just don't know how to start writing something that would allow me to take the cosine transform. Would I use dct(x,n)?

サインインしてコメントする。

回答 (1 件)

Walter Roberson
Walter Roberson 2016 年 4 月 18 日
You use a "for" loop from 0 to half of the number of points. In each one, you use a vectorized cos() calculation and add the vector of results to your running total. Like
total = zeros(size(x));
for K = 1 : 5
total = total + cos(f(x,K));
end
for some f(x,K)

カテゴリ

Help Center および File ExchangeDiscrete Fourier and Cosine Transforms についてさらに検索

Community Treasure Hunt

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

Start Hunting!

Translated by