Applying Two Filters Simultaneously

I'm trying to apply notch (stop) filter and highpass filter simultaneously for my data. Below is the code that I have so far.

Fs=24414;

t=0:1/Fs:435.13;

X=RawData;

Wn=10; % high cutoff

[b,a]=butter(5,Wn/Fs,"high");

Wn_2=[60 60]; % notch filter

y=filter(b,a,X);

[b,a]=butter(5,Wn_2/Fs,"stop");

z=filter(b,a,y);

plot(z);

What I'm trying to do is first apply highpass filter to my RawData (X) to obtain filtered data y, and then apply notch filter to y to obtain z.

Below is the graph that I'm getting. Please let me know what is wrong with my code. Thank you in advance for your help!

[Yazan]

Upload your data so that we can have a look.

[Soeun Lee]

Here's the link to my data (the file itself is too large to upload) https://drive.google.com/file/d/1vmeak6nmDW5Z1v6IL0oVZc10I41K_thA/view?usp=sharing

[Yazan]

Provide what frequencies you are trying to filter. Do you realize that the cutoff frequency of your butter filter is specified as 10/Fs, which is 3.3554e-08 the Nyquist rate (Fs/2)?

Answer 1

[Chunru]

Fs=24414;
t=0:1/Fs:435.13;
X=rand(size(t))+2;  % random noise + DC   %RawData;

Wn=10; % high cutoff
[b,a]=butter(5,Wn/(Fs/2),"high");

% Filter response (Problem: very low cut off and very high Fs)
figure
freqz(b, a, 1024*64, Fs);
xlim([0 200]);

% DC will be filtered out by HPF
figure;
y=filter(b,a,X);
plot(y);

% Notch filter was not properly designed (againg Fs/F0 is very big)

% Wn_2=[60 60]; % notch filter
% [b,a]=butter(5,Wn_2/(Fs/2),"stop");
notchSpecs  = fdesign.notch('N,F0,Q,Ap',6,60,10, 1, Fs);
notchFilt = design(notchSpecs,'SystemObject',false);
freqz(notchFilt, 1024*64, Fs);

Error using dfilt.basefilter/freqz (line 17)
This functionality is not available on remote platforms.

figure
z=filter(notchFilt,y);
plot(z);