How to filter real time data I received from Arduino?

I am using Arduino Mini to receive real time data. I was able to receive real time data (got help from MATLAB answers) but after I filtered the data the plotting stopped. How can I correct this (I also want the sampling rate of my input signal to be 5000 samples per second):

a = arduino;

% I also want the BaudRate of my signal to be 5000. How do I do that.

writeDigitalPin(a, 'D10', 1);

%% Receiving signal from Arduino and plotting the live data:

figure

al = animatedline;

ax1 = gca;

ax1.YGrid = 'on';

ax1.YLim = [-5 5];

stop = false;

startTime = datetime('now');

while ~stop

% Read current voltage value

v = readVoltage(a,'A0');

% Get current time

t = datetime('now') - startTime;

% Add points to animation

addpoints(al,datenum(t),v)

% Update axes

ax1.XLim = datenum([t-seconds(10) t]);

datetick('x','keeplimits')

drawnow

% Check stop condition

stop = readDigitalPin(a,'D12');

end

%receiving the coordinates from the signal.

[timeLogs,raw_Voltage_Logs] = getpoints(al);

timeSecs = (timeLogs-timeLogs(1))*24*3600;

%% Filtering the raw voltage logs.

%signal_bandpassed = bandpass(raw_Voltage_Logs,[10 500],5000);

transformed_signal = fft(raw_Voltage_Logs);

signal_down_sampled = downsample(transformed_signal,1000);

inverse_transformed = ifft(signal_down_sampled);

signal_highpassed = highpass(inverse_transformed,20,1000);

signal_lowpassed = lowpass(signal_highpassed,300,1000);

final_signal = rms(signal_lowpassed);

%% Plots

figure

ax1 = subplot(2,1,1);

plot(ax1,timeSecs,raw_Voltage_Logs)

title(ax1,'Raw Signal')

ylabel(ax1, 'Voltage(micro-V)')

ax2 = subplot(2,1,2);

plot(ax2,timeSecs,signal_lowpassed)

title(ax2,'Filtered Signal')

ylabel(ax2, 'Voltage(micro-V)')

xlabel('Elapsed time (sec)')