Input not numeric? error

AdaptFFTCleand.mat is a 4000x2 matrix of positve and negative real numbers. This is the error I get when running said code:

Error using filter

Invalid data type. Input arrays must be numeric or logical.

Error in LifeSings (line 18)

z1=filter(B,1,data(:,2)); % I channel signal

"

Error is in line 14 :"z1=filter(B,1,data(:,2)); % I channel signal

clc
clear all

load AdptFFTCleand.mat

ich = AdptFFTCleand.VarName1;
qch = AdptFFTCleand.VarName1;


data = AdptFFTCleand ;                       % import data options 
fs=100;                                       % Sampling frequency
fc=40;                                         % carrier frequency (corner frequency) 
fc_n = fc .* 2 /fs;                            % normalized frequency
B = fir1(1000,fc_n);                          % filter basics 
z1=filter(B,1,data(:,2));                    % I channel signal
z2=filter(B,1,data(:,4));                    % Q channel signal 

 
 I=z1;                                         % I data filtered
 Q=z2;                                        % Q data filtered 

hiFreq =20;
S = size (I);               % Check the size of data

fs = 100;                   % Sampling Frequency
%fs=1000;                    % Samopling frequency

f = 2440e6;                % Carrier Frequency
%f=24e9;                    % carrier frequency
lambda = 3e8/f;            % Calculate wavelength of carrier signal

% Convert # of samples to time
Array = 1:1:S(1,1);
Array = Array';
Time = Array/fs;
% Time = Time(100:end,1);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% DC_Removing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

I_no_dc = I - mean (I);
Q_no_dc = Q - mean (Q);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Arctangent demodulation
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Xt = atan2(Q_no_dc, I_no_dc);
Xt = unwrap(Xt);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Displacement Calculation
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

D = (lambda .* Xt)/(4*pi);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% FFT
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Nsamps = length(Xt);                    % Window length
y_fft = abs(fft(Xt));                   %Retain Magnitude
y_fft = y_fft(1:Nsamps/2);              %Discard Half of Points
% y_fft_dc = abs(fft(Xt_dc));           %Retain Magnitude
% y_fft_dc = y_fft_dc(1:Nsamps/2);      %Discard Half of Points
f = fs*(0:Nsamps/2-1)/Nsamps;           %Prepare freq data for plot

I_fft = abs(fft(I));                    %Retain Magnitude
I_fft = I_fft(1:Nsamps/2);              %Discard Half of Points

Q_fft = abs(fft(Q));                   %Retain Magnitude
Q_fft = Q_fft(1:Nsamps/2);             %Discard Half of Points

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Power Spectrum Density
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

P_I = 1/(Nsamps*fs)*abs(I_fft(1:Nsamps/2)).^2;
P_Q = 1/(Nsamps*fs)*abs(Q_fft(1:Nsamps/2)).^2;

[y_max index] = max(P_I(2:end));

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Plot Graphs
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

figure (1);
subplot(2,2,1)                                    % new subplot option
plot (Time, I);
legend ('I');
xlim([10 60])
title ('I channel');
xlabel ('Time [s]');
ylabel ('Amplitude [V]');
subplot(2,2,2)
plot (Time, Q, 'r');
xlim([10 60])
legend ('Q');
title ('Q channel');
xlabel ('Time [s]');
ylabel ('Amplitude [V]');


subplot(2,2,3)
plot(f, I_fft)
xlim([0 2])
xlabel('Frequency (Hz)')
ylabel('Magnitude')
axis([0,10,0,2500]);
title ('I channel FFT');
% set(gca,'FontSize',20);

subplot(2,2,4)
plot(f, Q_fft)
xlim([0 2])
xlabel('Frequency (Hz)')
ylabel('Magnitude')
axis([0,10,0,2500]);
title ('Q channel FFT');

[Matt J]

Did you intend to attach AdaptFFTCleand.mat? We cannot run the code otherwise.

Answer 1

[Matt J]

AdaptFFTCleand is a 4000x2 matrix of positve and negative real numbers.

It isn't possible that AdptFFTCleand is a numeric matrix if you are able to index it like a struct in these lines,

ich = AdptFFTCleand.VarName1;
qch = AdptFFTCleand.VarName1;

Hence also, data as set up this way,

data = AdptFFTCleand ;  

would also be a struct and not a numeric variable. That would explain why filter() complains.