Hi Victor,
On Jul 12, 2010, at 12:06 PM, Quincey Koziol wrote:
> Hi Victor,
>
> On Jul 12, 2010, at 9:56 AM, Victor Eijkhout wrote:
>
>> I'm trying to get two datasets into one file, and I'm clearly doing
>> something wrong. Can someone point out the obvious to me?
>
> Hmm, looks OK. What is "wrong" with what you are getting?
Ah, someone pointed out that you aren't getting '37' for the "parm"
dataset. That's because the variable you are using to write it out is a double
type. Either you need to use H5T_NATIVE_DOUBLE for the H5Dwrite() call, or
switch your type for the 'parm' variable to 'int'.
Quincey
> Quincey
>
>> #include "myh5defs.h"
>> #define FILE "wdset.h5"
>>
>> main() {
>>
>> hid_t file_id, dataset, dataspace; /* identifiers */
>> hid_t parmset,parmspace;
>> hsize_t dims[2];
>> herr_t status;
>> double data[24]; int i,parm;
>>
>> /* Create a new file using default properties. */
>> file_id = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
>>
>> /* Create the dataset. */
>> dims[0] = 4; dims[1] = 6;
>> dataspace = H5Screate_simple(2, dims, NULL);
>> dataset = H5Dcreate
>> (file_id, "/dset", H5T_NATIVE_DOUBLE, dataspace, H5P_DEFAULT);
>>
>> /* Add a descriptive parameter */
>> parmspace = H5Screate(H5S_SCALAR);
>> parmset = H5Dcreate
>> (file_id,"/parm",H5T_NATIVE_INT,parmspace,H5P_DEFAULT);
>>
>> /* Write data to file */
>> for (i=0; i<24; i++) data[i] = i+.5;
>> status = H5Dwrite
>> (dataset,H5T_NATIVE_DOUBLE,H5S_ALL,H5S_ALL,H5P_DEFAULT,
>> data); H5REPORT(status);
>>
>> /* write parameter value */
>> parm = 37;
>> status = H5Dwrite
>> (parmset,H5T_NATIVE_INT,H5S_ALL,H5S_ALL,H5P_DEFAULT,
>> &parm); H5REPORT(status);
>>
>> /* End access to the dataset and release resources used by it. */
>> status = H5Dclose(dataset);
>> status = H5Dclose(parmset);
>>
>> /* Terminate access to the data space. */
>> status = H5Sclose(dataspace);
>> status = H5Sclose(parmspace);
>>
>> /* Close the file. */
>> status = H5Fclose(file_id);
>> }
>>
>>
>>
>> Output:
>>
>> %% h5dump wdset.h5
>> HDF5 "wdset.h5" {
>> GROUP "/" {
>> DATASET "dset" {
>> DATATYPE H5T_IEEE_F64LE
>> DATASPACE SIMPLE { ( 4, 6 ) / ( 4, 6 ) }
>> DATA {
>> (0,0): 0.5, 1.5, 2.5, 3.5, 4.5, 5.5,
>> (1,0): 6.5, 7.5, 8.5, 9.5, 10.5, 11.5,
>> (2,0): 12.5, 13.5, 14.5, 15.5, 16.5, 17.5,
>> (3,0): 18.5, 19.5, 20.5, 21.5, 22.5, 23.5
>> }
>> }
>> DATASET "parm" {
>> DATATYPE H5T_STD_I32LE
>> DATASPACE SCALAR
>> DATA {
>> (0): 0
>> }
>> }
>> }
>> }
>>
>>
>> Writing either dataset on its own works correctly.
>>
>> Victor.
>> _______________________________________________
>> Hdf-forum is for HDF software users discussion.
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>> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
>
>
> _______________________________________________
> Hdf-forum is for HDF software users discussion.
> [email protected]
> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
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