Matlab h5read get errors

Hi,

When I use

    h5read('wo.h5',,'/g4/lat'),

got some errors as below: Error using h5readc The HDF5 library encountered an error and produced the following stack trace information:

    H5G_traverse_real    component not found
    H5G_traverse         internal path traversal failed
    H5G_loc_find         can't find object
    H5Dopen2             not found

Error in h5read (line 58) [data,var_class] = h5readc(Filename,Dataset,start,count,stride)

I am using Matlab 2013b, Does it matter with this? Thanks for help.

Answer 1

[per isakson]

• There is a typo, two commas where there should be one.
• The reason to the error is most likely that '/g4/lat' doesn't exist in your file. A typo?

I have found the program HDF5View very useful when working with HDF5-files. See HDF5 Tutorial: Learning HDF5 with HDFView

Agree, the error messages could have been more user friendly.

A little test with R2013a. The dataset, '/g4/lat', does not exist in 'myh5file.h5'. I get the same error message as you did.

    >> h5read('myh5file.h5',,'/g4/lat')
     h5read('myh5file.h5',,'/g4/lat')
                          |
    Error: Expression or statement is incorrect--possibly unbalanced (, {, or [.

    >> h5read('myh5file.h5','/g4/lat')
    Error using h5readc
    The HDF5 library encountered an error and produced the following stack trace information:

        H5G_traverse_real    component not found
        H5G_traverse         internal path traversal failed
        H5G_loc_find         can't find object
        H5Dopen2             not found
    Error in h5read (line 59)
    [data,var_class] = h5readc(Filename,Dataset,start,count,stride); 
    >> version
    ans =
    8.1.0.604 (R2013a)

[hejie]

Hi,If the dataset, '/g4/lat', does not exist in 'myh5file.h5'.So how should I read an entire data set of this file?

[Vijay Sagar]

Repaced the exception as given in the @jason answer. https://in.mathworks.com/matlabcentral/answers/44650-determine-if-variable-name-exists-in-netcdf-file

if parameter does not exist then give nan values wherever exception match.