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authorElena Pourmal <epourmal@hdfgroup.org>1999-06-18 21:11:50 (GMT)
committerElena Pourmal <epourmal@hdfgroup.org>1999-06-18 21:11:50 (GMT)
commitc858b613464a892b9446aadcfa56fe6ea03c8044 (patch)
treea362edf0e4df5255cad69449e57ed683fb111f90
parent998991d13d8db9219c3f115c9565b0e3ea994690 (diff)
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[svn-r1366]
Example was modified to show how fill values are set for the dataset. Typos in the comments were fixed and updated.
-rw-r--r--examples/h5_select.c30
1 files changed, 17 insertions, 13 deletions
diff --git a/examples/h5_select.c b/examples/h5_select.c
index 0137221..fa8ec0c 100644
--- a/examples/h5_select.c
+++ b/examples/h5_select.c
@@ -6,7 +6,7 @@
* Then four elements of the matrix are overwritten with the new values and
* file is closed. Program reopens the file and selects the union of two
* hyperslabs in the dataset in the file. Then it reads the selection into the
- * memory dataset preserving the shape of the selectin.
+ * memory dataset preserving the shape of the selection.
*/
#include <hdf5.h>
@@ -38,6 +38,8 @@ int main (void)
hid_t file, dataset; /* File and dataset identifiers */
hid_t mid1, mid2, mid, fid; /* Dataspace identifiers */
+ hid_t plist; /* Dataset property list identifier */
+
hsize_t dim1[] = {MSPACE1_DIM}; /* Dimension size of the first dataset
(in memory) */
hsize_t dim2[] = {MSPACE2_DIM}; /* Dimension size of the second dataset
@@ -58,7 +60,8 @@ int main (void)
from the file dataspace */
herr_t ret;
unsigned i,j;
- int matrix[FSPACE_DIM1][FSPACE_DIM2]; /* Buffer to write to the dataset */
+ int fillvalue = 0; /* Fill value for the dataset */
+
int matrix_out[MSPACE_DIM1][MSPACE_DIM2]; /* Buffer to read from the
dataset */
int vector[MSPACE1_DIM];
@@ -70,15 +73,16 @@ int main (void)
vector[0] = vector[MSPACE1_DIM - 1] = -1;
for (i = 1; i < MSPACE1_DIM - 1; i++) vector[i] = i;
- for (i = 0; i < FSPACE_DIM1; i++) {
- for (j = 0; j < FSPACE_DIM2; j++)
- matrix[i][j] = 0;
- }
+ /*
+ * Create a file.
+ */
+ file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
- /*
- * Create a file.
- */
- file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+ /*
+ * Create property list for a dataset and set up fill values.
+ */
+ plist = H5Pcreate(H5P_DATASET_CREATE);
+ ret = H5Pset_fill_value(plist, H5T_NATIVE_INT, &fillvalue);
/*
* Create dataspace for the dataset in the file.
@@ -86,10 +90,10 @@ int main (void)
fid = H5Screate_simple(FSPACE_RANK, fdim, NULL);
/*
- * Create dataset and write it into the file.
+ * Create dataset in the file. Notice that creation
+ * property list plist is used.
*/
- dataset = H5Dcreate(file, "Matrix in file", H5T_NATIVE_INT, fid, H5P_DEFAULT);
- ret = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, matrix);
+ dataset = H5Dcreate(file, "Matrix in file", H5T_NATIVE_INT, fid, plist);
/*
* Select hyperslab for the dataset in the file, using 3x2 blocks,