Serial reading and splitting data needs to be faster

The serial has to be read and the data has to be converged to a easy readable double matrix like …x1 double. I need to read the buffer and creates this matrix quickly so other code can run after. Reading the buffer is quick (0.5s), but I would like a speed improvement for creating the matrix (11s). Any ideas?
% stm = serial("COM5", ‘Baudrate’, 2000000);
% stm.InputBufferSize = 100000000; %100MB buffer, max is 2GB
% fopen(stm);
amount = 200;
data = cell(amount,1);
NotFullData = fscanf(stm); %make sure adc is on before sending and discard this
tic;
for i=1:1:amount
data{i} = fscanf(stm);
end
toc;
% fclose(stm);

%This part is slower
num_chunks = 8192;
len = length(data);
tic;
chunks = zeros(len*num_chunks, 1);

for a = 1:length(data)
data_buffer = cell2mat(data(a));
for i = 1:num_chunks
start_index = (i – 1) * 4 + 1;
end_index = start_index + 3;
chunks((a-1)*num_chunks+i,1) = str2double(data_buffer(start_index:end_index));
end
end
toc;
fscanf(stm); gives 1×32769 char
e.g. 3036303630343035303630363036303230333035303530353034303430363035303330333033303530353034303530353034303530313032303830353035303530343036303230343034303430363036303530343032303330343033303430353034303530353035303230333033303730343034303230323034303330283032

This code is even slower
% stm = serial("COM5", ‘Baudrate’, 2000000);
% stm.InputBufferSize = 200000000; %200MB buffer, max is 2GB
% fopen(stm);
amount = 200;
data = zeros(amount*8192,1);
NotFullData = fscanf(stm); %make sure adc is on before sending and discard this
tic;
for i=1:1:amount
read_data = fscanf(stm);
data_temp = str2double(cellstr(reshape(read_data(1:end-1),4,[])’));
for a=1:1:8192
data((i-1)*8192+a) = data_temp(a);
end
end
toc;
% fclose(stm);The serial has to be read and the data has to be converged to a easy readable double matrix like …x1 double. I need to read the buffer and creates this matrix quickly so other code can run after. Reading the buffer is quick (0.5s), but I would like a speed improvement for creating the matrix (11s). Any ideas?
% stm = serial("COM5", ‘Baudrate’, 2000000);
% stm.InputBufferSize = 100000000; %100MB buffer, max is 2GB
% fopen(stm);
amount = 200;
data = cell(amount,1);
NotFullData = fscanf(stm); %make sure adc is on before sending and discard this
tic;
for i=1:1:amount
data{i} = fscanf(stm);
end
toc;
% fclose(stm);

%This part is slower
num_chunks = 8192;
len = length(data);
tic;
chunks = zeros(len*num_chunks, 1);

This code is even slower
% stm = serial("COM5", ‘Baudrate’, 2000000);
% stm.InputBufferSize = 200000000; %200MB buffer, max is 2GB
% fopen(stm);
amount = 200;
data = zeros(amount*8192,1);
NotFullData = fscanf(stm); %make sure adc is on before sending and discard this
tic;
for i=1:1:amount
read_data = fscanf(stm);
data_temp = str2double(cellstr(reshape(read_data(1:end-1),4,[])’));
for a=1:1:8192
data((i-1)*8192+a) = data_temp(a);
end
end
toc;
% fclose(stm); The serial has to be read and the data has to be converged to a easy readable double matrix like …x1 double. I need to read the buffer and creates this matrix quickly so other code can run after. Reading the buffer is quick (0.5s), but I would like a speed improvement for creating the matrix (11s). Any ideas?
% stm = serial("COM5", ‘Baudrate’, 2000000);
% stm.InputBufferSize = 100000000; %100MB buffer, max is 2GB
% fopen(stm);
amount = 200;
data = cell(amount,1);
NotFullData = fscanf(stm); %make sure adc is on before sending and discard this
tic;
for i=1:1:amount
data{i} = fscanf(stm);
end
toc;
% fclose(stm);

%This part is slower
num_chunks = 8192;
len = length(data);
tic;
chunks = zeros(len*num_chunks, 1);

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