How to open .cdf file

Hai Everyone,

Anyone can help me how to open the .cdf file as attacheed.

The .cdf file is their header file. Attached.

I tried this code but failed.

**I also attached the function imshow3D

clc
clear all
close all
sz = [128 128 128];
fname = 'jaszaki13110n1date14012024531193.cdf';
fid = fopen(fname);
data = fread(fid,'*uint16'); % assuming uint
fclose(fid);
% this is blindly devectorized 
% may still be transposed, but i can't tell due to symmetry
% note that data is unit-scale single-precision float
data = reshape(data,sz); 
imshow3D(data);

Error using reshape

Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that

dimension.

[Dyuman Joshi]

cdfread would be a better option here.

However, the file you have attached seems to be corrupt - as can be seen from the output of fopen() and the error from cdread()

arr = unzip('New folder (3).zip')

arr = 1×4 cell array
    {'New folder (3)/desktop.ini'}    {'New folder (3)/imshow3D.m'}    {'New folder (3)/jaszaki1318n1date15012024…'}    {'New folder (3)/jaszaki1318n1date15012024…'}

fname = 'jaszaki13110n1date14012024531193.cdf';

fid = fopen(fname)

fid = -1

cdfread(fname)

Error using cdfread
Unable to open file. File might be corrupt or filename might have unsupported characters.

Answer 1

[Voss]

sz = [128 128 128];

unzip('New folder (3).zip')
ls

'New folder (3)'  'New folder (3).zip'

addpath('New folder (3)') % to run imshow3D.m

The size of the cdf file (16777216 bytes) is consistent with the file containing 128*128*128 64-bit elements.

F = dir(fullfile('New folder (3)','*.cdf'))

F = struct with fields:
       name: 'jaszaki1318n1date15012024.cdf'
     folder: '/users/mss.system.nXJGBc/New folder (3)'
       date: '16-Jan-2024 03:34:26'
      bytes: 16777216
      isdir: 0
    datenum: 7.3927e+05

F(1).bytes/8 == prod(sz)

ans = logical
   1

Whether those are uint64s or doubles, I don't know, but I'd guess doubles based on what imshow3D shows.

fid = fopen(fullfile(F(1).folder,F(1).name));
data = fread(fid,'*uint64');
fclose(fid);

data = reshape(data,sz);

figure
imshow3D(data);

fid = fopen(fullfile(F(1).folder,F(1).name));
data = fread(fid,'double');
fclose(fid);

data = reshape(data,sz);

figure
imshow3D(data);

Does that look like what's expected?

[mohd akmal masud]

Dear @Voss

Thank you very much, this is what I need.

[Voss]

You're welcome!