How does MATLAB output fixed-length hexadecimal data (automatically fill high bits with zeros) and store it in a file?

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How does MATLAB output fixed-length hexadecimal data (automatically fill high bits with zeros) and store it in a file? [Copy link]

# How does MATLAB output fixed-length hexadecimal data (automatically fill in zeros at high places) and store it in a file? **Table of Contents** [TOCM] ## 1. MATLAB outputs fixed-length hexadecimal data (automatically fill in zeros at high places) and stores it in a file. Sometimes, for the convenience of operation, you need to convert a decimal data into hexadecimal and store it. However, if you store it directly, you will find that if there is no valid data in the high places, the high-order zeros will be omitted, and the output file looks very inconvenient. We have designed a MATLAB program that can effectively solve this problem, automatically fill in zeros at the missing positions of the fixed-length hexadecimal data, and write the hexadecimal data neatly into the file. ```c N = 512;%% data length rrr = fopen('shujv.txt','a');%% open file for i = 1:1:N; y(i) = i;%% generate sawtooth wave end for i = 1:1:N; % if(i <= 15) fprintf(rrr,'%04s',num2str(dec2hex(y(i)),'%04d')); %% output a string of fixed length, fill the high bits with zeros to align '0000', '0001' fprintf(rrr,' '); %% newline end fclose(rrr);%% close file``` Open the generated file and you will find that the data looks very neat and comfortable. 
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 ## 2. MATLAB reads the hexadecimal data file in the text document and draws the data change curve```c %%%%%%%%Read the hexadecimal file in txt and draw the curve%%%%%%%%%%%%%%%%% TXT = textread('E:\8,matlab\matlab reads txt file data\shujv.txt','%s');%%Read to TXT txt_change = hex2dec(TXT); Length = length(txt_change);%%Calculate the length m = 1:1:Length; %%Plot points plot(m,txt_change) %%Draw a picture``` 
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Jacktang

Convert a decimal data to hexadecimal and store it directly. You will find that it is really inconvenient

The landlord's method is very good

freebsder

Thanks for sharing your experience.

chenzhufly

I have forgotten all about matlab

bqgup

chenzhufly posted on 2021-4-24 22:13 I have forgotten everything about matlab

I picked it up right away with the basics, and copied and pasted it.

How does MATLAB output fixed-length hexadecimal data (automatically fill high bits with zeros) and store it in a file? [Copy link]

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