How do I open .bin file and transform data to .txt file

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Lukas 2023-12-2

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评论： Star Strider 2023-12-2

采纳的回答： Star Strider

I would like to open bin file with these specification:

Sampling frequency [Hz]:5000

Datatype: 4-byte float

Channels:57

Samples:3000000

What do I need is to have every channel in one column. I was trying to use fread and fopen but I miss something.

Thanks!

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Image Analyst 2023-12-2

Can youi possibly get a file with far fewer samples so it can be uploaded? Needs to be less than 5 MB. What application created the file? Can you just tell it to collect less data?

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Star Strider 2023-12-2

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A ‘4-byte float’ is probably 'float32' (possibly 'real*4'), so one of those should work for the ‘precision’ argument in fread.

Use the zip function to enclose it in a .zip file, then use the ‘paperclip’ icon (to the right of the Σ icon) in the top toolstrip to upload it here. Then it be available to work with and help you read it.

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Star Strider 2023-12-2

在 MATLAB Online 中打开

One option could be to use the reshape function before writematrix. If it is supposed to have 57 columns (channels), the reshape call might go something like this —

D = (1:57*5).'                                          % Create A Short Version Of 'D' For Demonstration Purposes
D = 285×1
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
Dr = reshape(D, [], 57)
Dr = 5×57
     1     6    11    16    21    26    31    36    41    46    51    56    61    66    71    76    81    86    91    96   101   106   111   116   121   126   131   136   141   146
     2     7    12    17    22    27    32    37    42    47    52    57    62    67    72    77    82    87    92    97   102   107   112   117   122   127   132   137   142   147
     3     8    13    18    23    28    33    38    43    48    53    58    63    68    73    78    83    88    93    98   103   108   113   118   123   128   133   138   143   148
     4     9    14    19    24    29    34    39    44    49    54    59    64    69    74    79    84    89    94    99   104   109   114   119   124   129   134   139   144   149
     5    10    15    20    25    30    35    40    45    50    55    60    65    70    75    80    85    90    95   100   105   110   115   120   125   130   135   140   145   150

Then, write ‘Dr’ to the file. This assumes that this is the correct way to reshape it and write it, and its total length is an integer multiple of 57 (otherwise reshape will fail, although buffer could still be an option in that event). I have no idea what other necessary metadata might be in the file that would be required to reshape it in some other way, so this is the best I can do.