---
myst:
    substitutions:
        bloc:
            python: 3-10
            cpp: 3,6-12
---
# Export to an ASCII file

In the same way as the data are imported from an ASCII file, we can also save the data of a {{tds}} 
in an ASCII file. Currently, four methods of export are available in {{uranie}}:

- using the same format as that observed during import ("Salome Table");

- using a **C** file containing the data vectors that can be inserted in a **C** program.

- using the **NeMo** format: the generated file is useful for the **NeMo** tool for constructing 
neural response surface developed at STMF.

- using the **JSON** format: the generated file is easily transferable to any other program that 
include the JSON protocol. This file can also be read through the `fileDataReadJSon` method of a 
{{tds}} object.

{{  
    "```{literalinclude} " + parent_dir 
    + "/roottest/uranie/doc/dataserver/data/" + language + "/export_ascii_file." 
    + extension + "\n"
    + ":language: " + language + "\n"
    + ":lines: " + bloc[language] + "\n"
    + "```" 
}}  

**Data export from a {{tds}} in an ASCII file**

1. Export the data of the {{tds}} *tdsGeyser* in an ASCII file `"newfile.dat"`:

    {{  
        "```{literalinclude} " + parent_dir 
        + "/usermanual/dataserver/files/geysernewfile.dat\n" 
        + ":language: none\n"
        + "```" 
    }}  

2. Exports the data of attributes *x1, x2 and y* of the {{tds}} *tdsGeyser* in the ASCII file 
`"newfile.C"` A format "Header".

    {{  
        "```{literalinclude} " + parent_dir 
        + "/usermanual/dataserver/files/geysernewfile.C\n"
        + ":language: none\n"
        + "```" 
    }}  

3. Exports the data of the {{tds}} *tdsGeyser* in an ASCII file `newfile.nemo` with format *NeMo* 
with *x1:x2* as input vector, *"y"* as output and applying a filter "x2<75.0"

    {{  
        "```{literalinclude} " + parent_dir 
        + "/usermanual/dataserver/files/geysernewfile.nemo\n" 
        + ":language: none\n"
        + "```" 
    }}  

4. Exports the data of the {{tds}} *tdsGeyser* in an ASCII file `newfile.json` with format *JSON*. 

    {{  
        "```{literalinclude} " + parent_dir 
        + "/usermanual/dataserver/files/geysernewfile.json\n" 
        + ":language: none\n"
        + "```" 
    }}  

```{admonition} Summary: Exportation of a {{tds}} to ASCII format
- `exportData` ( __const char\*__  filename, __const char \*__ varexp="\*", __const char \*__ 
select="" )

    Exportation of the data of attributes *"varexp"* of the {{tds}} in the file *"filename"* in ASCII 
    format, **"Salome table"** type, applying the filter contained in *"select"*. The filter "select" 
    is added to the permanent selection (*c.f.* [](#dataserver_data_pattern_selection)) of the {{tds}}.

- `exportDataJSon` ( __const char\*__  filename, __const char \*__ varexp="\*", __const char \*__ 
select="" )

    Exportation of the data of attributes *"varexp"* of the {{tds}} in the file *"filename"* in JSON 
    format, applying the filter contained in *"select"*. The filter "select" is added to the 
    permanent selection (*c.f.* [](#dataserver_data_pattern_selection)) of the {{tds}}.

- `exportDataHeader` ( __const char\*__  filename, __const char \*__ varexp="\*", __const char \*__ 
select="" )

    Exportation of the data of attributes *"varexp"* of the {{tds}} in the file *"filename"* in ASCII 
    format for the use of a *C/C++* program. The "select" filter is added to the permanent selection 
    (*c.f.* [](#dataserver_data_pattern_selection)) of the {{tds}}.

- `exportDataNeMo` ( __const char\*__  filename, __const char \*__ varexpinput, __const char \*__ 
varexpoutput, __const char \*__ select="" )

    Exportation of the {{tds}} data in the file *"filename"* {{tds}} in ASCII format **NeMo** with 
    attributes *"varexpinput"* as inputs (separated by the character ":") and attributes 
    *"varexpoutput"* as outputs (separated by the character ":") and applying the filter contained 
    in option. The "select" filter is added to the the permanent selection 
    (*c.f.* [](#dataserver_data_pattern_selection)) of the {{tds}}
```