---
name: "tela"
section: "1"
platform: "linux"
package: "tela"
version: "2.0-12"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/tela"
---

# tela(1)

TEnsor LAnguage

        {

## NAME

tela - TEnsor LAnguage

## SYNOPSIS

**tela**	\[ **-v** ⎪ **--verbose** \] \[ **-b** ⎪ **--batch** \] \
 	\[ **-f** ⎪ **--fast** \] \[ **-s** ⎪ **--silent** \] \
 	\[ **-p** ⎪ **--profile** \] \[ **-O**\[*level*\] \] \
 	\[ **-e** *tela-code* ⎪ **--execute** *tela-code* \] \[ *files* \]  **tela** **-V** ⎪ **--version**  **tela** **-?** ⎪ **-h** ⎪ **--help**

## DESCRIPTION

Start **tela**; first execute *tela-code*, then each of *files* in  turn (if any), finally enter interactive mode.  Tela is a numerical computing environment mainly targeted for  numerical simulation pre- and post-processing work.  The language  supports arbitrary rank arrays (hence the name, TEnsor LAnguage), and  has powerful programming capabilities including F90 style vector  notation.  Two- and three- dimensional graphics is implemented by  calling PlotMTV.  For 2D graphics, the SPPC interface is also  available.  The on-line help is intended as the primary source of documentation.  The command **help** *topic* gives help on *topic*, where *topic*  can be individual reserved words, function names, etc.

## OPTIONS

**tela** accepts the following options:  Quit after executing *tela-code*, or *files*.  Execute Tela expressions *tela-code*.  Do not source any initialization files; see the section on *INITIALIZATION*.  Select optimization level.  **-O0**, the default, means no  optimization.  **-O**, and **-O1** enable flat-code optimization.  Print help message and exit.  Suppress startup message, MIPS count, and FLOPS count.  Collect per-function profiling data (total time, time per call,  MFLOPS) and output it at the end of the run.  Set verbose execution mode: list tree-codes and flat-codes.  Print version number and exit.

## INITIALIZATION

Unless suppressed with the **-f** or **--fast** options **tela** tries to  source the file *telainit.t* (or just *telainit* if that  exists).  The sourced files are searched in a directory path, which is  obtained as follows:  A compiled-in default, typically  `"/usr/local/lib/tela/t:/usr/local/lib/tela/ct:/usr/local/lib/tela:."`  If set, the environment variable **TELAPATH\_SYSTEM** overrides  the compiled-in default, or appends to it if it starts with a colon.  Similarly, if set, the environment variable **TELAPATH** overrides  the previous, or appends to them if it starts with a colon.  The combined effect of the compiled-in default, **TELAPATH\_SYSTEM**,  and **TELAPATH** can be seen by giving the command **telapath()** in  Tela.  The standard *telainit.t* tries to source `$HOME`/*.telainit.t*.

## ENVIRONMENT

Besides **TELAPATH** and **TELAPATH\_SYSTEM**, **tela** recognizes the  following environment variables: **TELA\_PLOTMTV** specifies the PlotMTV  program to use (default: `plotmtv`).  The function `whos()` displays  variables and uses the **PAGER** (default: `more`) and **TELA\_SORTER**  (default: `sort` `-b` `-f` `-k` `1`) environment variables.

## SEE ALSO

```
    telakka     Tela extension utility
    ctpp        Tela preprocessor
    plotmtv     Standard associated graphics package
    sppc        Alternative graphics package
    m2t         Matlab to Tela translator
```

## HISTORY

Tela by Pekka Janhunen; man page by Ch. L. Spiel, 2000-3-9.