writetable — Write a table to a delimited text file.
writetable(T, filename) writes table variables to a delimited text file.
Syntax
writeTabular(T, filename, ...)Inputs
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
A | Any | Yes | — | Input value. |
args | Any | Variadic | — | Name-value options or conversion arguments. |
Errors
| Identifier | When | Message |
|---|---|---|
RunMat:table:InvalidArgument | Arguments or table metadata are invalid. | table: invalid argument |
RunMat:table:InvalidIndex | Table indexing is invalid. | table: invalid index |
RunMat:table:InvalidVariable | A table variable name or value is invalid. | table: invalid variable |
RunMat:readtable:IOError | readtable cannot open or read the requested file. | readtable: file read failed |
RunMat:readtable:UnsupportedFileType | readtable receives a file type outside the text or spreadsheet import backends. | readtable: unsupported file type |
How writetable works
"Delimiter"controls the field separator and defaults to comma."WriteVariableNames"controls header emission and defaults to true.- Fields containing delimiters, quotes, or newlines are CSV-quoted.
- Variables from all eight native integer classes are serialized with their exact decimal values.
- A typed-integer
WriteVariableNamesvalue, explicitgpuArrayinput, and the bytes-written output are available in RunMat mode.
Example
Write CSV
writetable(T, 'out.csv')Using writetable with coding agents
Open a RunMat example with live inputs, then ask the agent to explain how writetable changes the result.
Run a small writetable example, explain the result, then change one input and compare the output.
Related Io functions
Tabular
arrayDatastore · csvread · csvwrite · detectImportOptions · dlmread · dlmwrite · fileDatastore · parquetDatastore · parquetinfo · parquetread · readcell · readmatrix · readtable · readtimetable · spreadsheetImportOptions · writecell · writematrix · writetimetable · xlsread · xlswrite
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
Filetext
fclose · feof · fgetl · fgets · fileread · filewrite · fopen · fprintf · fread · frewind · fwrite · readlines · writelines
Import
Json
Related guides
Open-source implementation
Unlike proprietary runtimes, every RunMat function is open-source. Read exactly how writetable is executed, line by line, in Rust.
- View the source for writetable in Rust on GitHub
- Learn how the RunMat runtime works
- Found a bug? Open an issue with a minimal reproduction.
About RunMat
RunMat is an open-source runtime that executes MATLAB-syntax code blazing on any GPU. It is licensed under the Apache 2.0 license.
- RunMat automatically optimizes your math for GPU execution on Apple, Nvidia, and AMD hardware. No code changes needed. Simulations that took hours now take minutes.
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