Changing from logarithmically spaced

S
S
2024 2 28
2 个回答
更新时间：2024 3 27
5 次查看（30 天）

0 个投票

I currently have a function which gives me center frequencies, but I want to change the chape to be more like the attached. What I have right now is similar to this but flipped, how can I change my code to give me center frequencies shapes like the image? Thank you for your time!
fs = 20e3;
numFilts = 32; %
filter_number = 5;
order = 4;
CenterFreqs = logspace(log10(50), log10(8000), numFilts);
figure
plot(CenterFreqs)
title('Center Frequncies')

请先登录，再回答此问题。

回答（2 个）

Mann Baidi
Mann Baidi 2024-2-28
编辑：Mann Baidi 2024-2-28
Ran in:

0 个投票

Ran in:
Hi,
As per the information provided, I can understand that you would like to shape your graph same as the shape of image shared. I would suggest you to plot the data of the 'CenterFreqs' by multiplying it -1 and plot the graph in the -ve -axis. So, basically plotting the mirror image w.r.t the origin (0,0). You can use this modified code:
fs = 20e3;
numFilts = 32;
filter_number = 5;
CenterFreqs = logspace(log10(50), log10(8000), numFilts);
plot(CenterFreqs)
title('Original Graph')
figure
CenterFreqs=-1*CenterFreqs; % Mirror image w.r.t to x-axis
plot(-1:-1:-32,CenterFreqs) % Mirror image w.r.t to y-axis
title('Desired Graph')
Hoping this will help in resolving the issue!
Dyuman Joshi
Dyuman Joshi 2024-2-29
Ran in:

0 个投票

Ran in:
fs = 20e3;
numFilts = 32;
filter_number = 5;
order = 4;
CenterFreqs = logspace(log10(50), log10(8000), numFilts);
figure
plot(CenterFreqs, 'DisplayName', 'Original Plot')
hold on
%flipping x and y values accordingly
plot(flip(1:numel(CenterFreqs)), max(CenterFreqs)-CenterFreqs, 'DisplayName', 'Modified Plot')
title('Center Frequncies')
legend('Location', 'best')

5 个评论
显示 3更早的评论 隐藏 3更早的评论

S
S 2024-3-4
The shape is now correct, but I use center frequencies later so I do not want to change just the plot I want to also change the values. I tried this, but the shape is incorrect, how could I modify this?
fs = 20e3;
numFilts = 32; %
filter_number = 5;
order = 4;
CenterFreqs = logspace(log10(50), log10(8000), numFilts);
CenterFreqs=flip(1:numel(CenterFreqs));
figure
Dyuman Joshi
Dyuman Joshi 2024-3-5
Sorry, but I don't understand what you meant to say.
Do you want to get the values of the flipped/mirrored plot?
Then use this -
flipx_values = flip(1:numel(CenterFreqs));
flipy_values = max(CenterFreqs)-CenterFreqs;
S
S 2024-3-27
@Dyuman Joshi Yes so if I want to resave these flipped y values under centerfreqs, I could just do
CenterFreqs=flipy_values because when I do this it messes up the rest of my script when it should just be the reverse of the original CenterFreqs

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Image Arithmetic 的更多信息

标签

提问:

S
S
2024-2-28

评论：

S
S
2024-3-27

Community Treasure Hunt

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

Start Hunting!

Translated by