h5writeatt — Write an HDF5 attribute on a file, group, or dataset.
h5writeatt(filename, location, attribute, data) creates or replaces an attribute at the file root, a group, or a dataset.
Syntax
h5writeatt(filename, location, attribute, data)How h5writeatt works
- Numeric, logical, string, and char attributes are supported.
- Unsupported MATLAB value classes raise deterministic unsupported-type errors.
Example
Write units metadata
h5writeatt('out.h5', '/A', 'units', 'm/s');Using h5writeatt with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how h5writeatt changes the result.
Run a small h5writeatt example, explain the result, then change one input and compare the output.
Related Io functions
Repl Fs
addpath · cd · copyfile · delete · dir · exist · fileattrib · fileparts · fullfile · genpath · getenv · getpref · isenv · isfile · isfolder · ispref · ls · matlabroot · memmapfile · mkdir · movefile · open · opentoline · path · pathsep · pcode · pwd · readstruct · rehash · restoredefaultpath · rmdir · rmpath · run · savepath · setenv · setpref · system · tempdir · tempname · uigetdir · uigetfile · uiputfile · unsetenv · userpath · what · winqueryreg · xmlread · xmlwrite
Tabular
arrayDatastore · csvread · csvwrite · detectImportOptions · dlmread · dlmwrite · fileDatastore · parquetDatastore · parquetinfo · parquetread · readcell · readmatrix · readtimetable · spreadsheetImportOptions · writecell · writematrix · writetable · writetimetable · xlsread · xlswrite
Filetext
fclose · feof · fgetl · fgets · fileread · filewrite · fopen · fprintf · fread · frewind · fwrite · readlines · writelines
Import
Json
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how h5writeatt is executed, line by line, in Rust.
- View the source for h5writeatt in Rust on GitHub
- Learn how the RunMat runtime works
- Found a bug? Open an issue with a minimal reproduction.
About RunMat
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