How can I modify the following code to send data row by row instead of column by column using UDP?

I have data with five columns. Currently, I am sending each column one at a time. For example, I send column 1 first, followed by column 2, and so on. However, I want to modify the code to send each row at a time instead of each column.

clear;clc
client_port = 10011;
client_address = '192.168.100.201';
to = [data(:,1).' ;data(:,2).' ;data(:,3).' ;data(:,4).';data(:,5).'];
u1 = udpport("IPV4","OutputDatagramSize",6610);

for j = 1:5
    
    write(u1,(to(j,1:length(toa_arr))),"double",client_address,client_port);
    
end

Answer 1

[Voss]

"I have data with five columns"

I assume that's the variable data in your code.

You can write data by row the exact way you are currently writing to by row:

for j = 1:length(toa_arr)
    write(u1,data(j,:),"double",client_address,client_port);
end

Or by reshaping data (or the part of data you want to write - the relation between length(toa_arr) and the size of data is not clear) to be a vector of elements in the correct order:

write(u1,reshape(data(1:length(toa_arr),:).',[],1),"double",client_address,client_port);

By the way, I notice that the variable pdw in the mat file you uploaded is of size 6610-by-5. I guess this is your data with five columns. Note that "OutputDatagramSize" is in bytes, and a double is 8 bytes, so you may have wanted to specify OutputDatagramSize as 6610*8 instead of 6610.

[Med Future]

@Voss Thank you for your comment. If I don't know the size of the data, as in the example where I have a dataset of size 6610x5, and I am receiving real-time data with 5 columns but an unknown number of rows, how can I modify the code to handle this?

[Med Future]

@Voss How can i read this on Client reciving side?

[Med Future]

@Voss It takes so much time in sending value. How can i modified that?

[Voss]

"I am receiving real-time data with 5 columns but an unknown number of rows"

for j = 1:size(data,1)
    write(u1,data(j,:),"double",client_address,client_port);
end

"How can i read this on Client reciving side?"

https://www.mathworks.com/help/instrument/udpport.read.html

"It takes so much time in sending value. How can i modified that?"

I have no idea.

[Med Future]

@Voss Thanks for your reply. Can you please modified the code on reciever side in which wait for 1 second to read all data.

[Voss]

To wait for 1 second, you can use

t = tic;
while toc(t) < 1
    % do nothing, just wait
end

[Med Future]

@Voss But When i am reading the data data = read(u2,6610,"double"); in this command i need to write the value like 6610. How can i modified this? Can you please check the this question i have posted recently.

https://www.mathworks.com/matlabcentral/answers/2090031-how-do-i-implement-a-one-second-buffer-for-incoming-udp-data?s_tid=srchtitle