How to save data in a raw file?

Hi,

I am quite new in MAtlab and I would like to have some help,

I have a sine with amplitude and time and I want to save the amplitude data into a raw file. How can I get it? I have tried with the code above.

I am not sure if it is correct. So I would like to know if it is correct or in other way, how can I do it in a correct way. Thank you in advance.

fid=fopen('Profilevoltage.raw','w');
fwrite(fid,amplitude,'uint16');
fclose(fid);

[Bob Thompson]

What do you mean by 'raw' file? Is that an actual file type, or are you meaning a basic ascii or binary file?

[joseba gonzalez]

Hi Bob,

First of all, thank you for answering.

Is an image file type where I have to use it to upload this data into a machine which only reads data in ".raw" file type. And yes it is a binary file, that is saved like an image.

I don´t know if I have explained myself correctly.

Answer 1

[Namwon Kim]

Your code,

fid=fopen('Profilevoltage.raw','w');
fwrite(fid,amplitude,'uint16');
fclose(fid);

I recommend that you try those codes.

Use a matrix transpose

fid=fopen('Profilevoltage.raw','w+');
fwrite(fid,amplitude','uint16');
fclose(fid);

[Fady Samann]

it worked for me, thanks. But why the matrix transpose? How the 'fwrite' is saving the data?

[Namwon Kim]

By default, 'fwrite' writes values from an array in column order as 8-bit unsigned integers.

[Fady Samann]

thanks for the answer

Answer 2

[Shane Gibbs]

I believe I found someone with the same issue as well.

https://www.mathworks.com/matlabcentral/answers/248243-export-the-data-of-the-plot-to-txt-or-dat-file

Hope this helps!

[joseba gonzalez]

Hi Shane,

Thank you for answering,

The main point is that I have the plot data saved in .txt file but I have problems when saving this data in .raw file type...

[Bob Thompson]

If the data is being saved in a binary format, then you can just label the file as '.raw' rather than '.txt'. You do need to make sure you are saving it in a binary compatible file format first though.