Receive serial data in Hex

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I wanted to write data received from serial port in text file. I want received data in the form
40 00 20 00 10 00 08 00 00 0A 0F 0D 10
but i am getting data in the test file as 40 0 20 0 10 0 8 0 0 A F D 10.
Please tell me what should i use to get data as i received.
I am using following code
Rcvd = fread(serConn,45000,'char');
hexpass=sprintf(num2str('%3X', Rcvd));
header1 = '';
file_id=fopen('MyFile.txt','w');
fprintf(file_id,[header1 '\n']);
fprintf(file_id,'%s',hexpass);
Please suggest me to get the data in txt file as
40 00 20 00 10 00 08 00 00 0A 0F 0D 10
Thanks in adavance

采纳的回答

Walter Roberson
Walter Roberson 2016-4-5
hexpass = num2str(Rcvd, '%02X ');
hexpass(end) = ''; %get rid of trailing space
  2 个评论
Prashant Funde
Prashant Funde 2016-4-6
编辑:Walter Roberson 2016-4-6
Hello Mr. Walter thanks for your answer but if i use above mentioned functions/steps then data written in txt file is coming like
2C41A7F3CF23402010000000000040201
where as in a text box or display it is seen like
24
CC
43
A4
70
and like this. So if i am using following lines
% hexpass=sprintf(num2str('%03X', Rcvd)); %Convert Data reaceived at COM port to hex value
hexpass = num2str(Rcvd,'%02X ');
hexpass(end) = ''; %get rid of trailing space
assignin('base','Hex',hexpass);
set(handles.Rx,'String',hexpass);
disp(hexpass);
header1 = 'Data in Hex format';
file_id=fopen('MyFile.txt','w');
fprintf(file_id,[header1 '\n']);
fprintf(file_id,'%s',hexpass);
fclose(file_id);
Walter Roberson
Walter Roberson 2016-4-6
hexpass = num2str(Rcvd(:).', '%02X ');
hexpass(end) = ''; %get rid of trailing space

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