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Binary file size resets to zero after every iteration

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Imtiaz nabi
Imtiaz nabi 2022-4-7
编辑： Imtiaz nabi 2022-4-7
Hi there,
I am trying to write a binary file containing Intermediate Frequency data. The code needs to run for 30 iterations and at every iteration the binary file resets back to zero... I want it to continue writing to the file while keeping all the previous data in it too... Technically the file size needs to grow and grow and grow but after every iteration it returns back to zero and starts from the beginning.
what should I do?
Here's the code snippet that you might want to check...
The code is too big to be uploaded here so I will post only the desired section here

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采纳的回答

Walter Roberson
Walter Roberson 2022-4-7
'w' and 'W' access both request that the content of any existing file is deleted. You need 'a' (append) access.
  2 个评论
Imtiaz nabi
Imtiaz nabi 2022-4-7
so if I use 'a' will it still write binary data just like the wb or Wb? or I will need to use ab
Walter Roberson
Walter Roberson 2022-4-7
'b' access is ignored in MATLAB. MATLAB defaults to binary.
C and C++ default to text access and need you to use 'b' for binary in those languages.
MATLAB defaults to binary and you need to use 't' for text in MATLAB.

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Imtiaz nabi
Imtiaz nabi 2022-4-7
Ok thank you let me try and if it works and I don't have any question then I will accept this answer thank you for now

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