首先,先原谅我的非常基础的问题:我正在学习教程,并成功地编写了我的第一个HDF5数据集。现在,我要开始使用slab,但是我发现做这个有点困难。
据我所知,我需要获得有效的内存空间,选择一个slab,然后写入我的数据。但显然我做错了什么,因为我遇到了错误:
HDF5-DIAG: Error detected in HDF5 (1.8.14) thread 0:
#000: H5Dio.c line 271 in H5Dwrite(): can't prepare for writing data
major: Dataset
minor: Write failed
#001: H5Dio.c line 352 in H5D__pre_write(): can't write data
major: Dataset
minor: Write failed
#002: H5Dio.c line 690 in H5D__write(): src and dest data spaces have different sizes
major: Invalid arguments to routine
minor: Bad value
显然我试图用错误的维度写数据,但我不知道如何纠正。我的目标是创建一个20x3的矩阵,并将第二行设置为{10, 20, 30}
:
0 0 0
10 20 30
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
你能帮助我理解这个问题吗?我下面有一个有问题的代码!
谢谢!
#include "hdf5.h"
#define FILE "dset.h5"
#define DSET "/dset"
int main() {
hid_t file_id, dataset_id, dataspace_id, filespace, memspace;
hsize_t dims[2], offset[2], count[2];
herr_t status;
unsigned int dset_data[3] = { 10, 20, 30 };
/* Create a new file using default properties. */
file_id = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
/* Create the data space for the dataset. */
dims[0] = 20; /* ROWS */
dims[1] = 3; /* COLS */
dataspace_id = H5Screate_simple(2, dims, NULL);
/* Create the dataset. */
dataset_id = H5Dcreate2(file_id, DSET, H5T_STD_I32BE, dataspace_id,
H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
/* Get the memory space */
memspace = H5Dget_space (dataset_id);
offset[0] = 1; /* ROWS */
offset[1] = 0; /* COLS */
count[0] = 1; /* ROWS */
count[1] = 3; /* COLS */
/* Select the slab */
status = H5Sselect_hyperslab(memspace, H5S_SELECT_SET,
offset, NULL, count, NULL);
/* Write the dataset. */
status = H5Dwrite(dataset_id, H5T_NATIVE_INT,
memspace, H5S_ALL, H5P_DEFAULT,
dset_data);
/* End access to the dataset and release resources used by it. */
status = H5Dclose(dataset_id);
/* Terminate access to the data space. */
status = H5Sclose(dataspace_id);
/* Close the file. */
status = H5Fclose(file_id);
}
newsize[1] = { 3 }
,在memspace = H5Dget_space (dataset_id);
之后添加memspace的调整大小status = H5Dextend (memspace, newsize);
,最后在数据集上进行块选择status = H5Sselect_hyperslab(dataset_id, H5S_SELECT_SET, offset, NULL, count, NULL);
。但是我遇到了两个错误:H5Ddeprec.c line 315 in H5Dextend(): not a dataset
和H5Shyper.c line 6593 in H5Sselect_hyperslab(): not a data space
。我在这里漏掉了什么...完整代码:https://gist.github.com/anonymous/ef0386340eefb4ef5b23 - newbieppH5Screate_simple
来创建它。 - Simon