> For the complete documentation index, see [llms.txt](https://docs.geopard.tech/geopard-tutorials/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.geopard.tech/geopard-tutorials/dnk/korte-gis-tips/qgis-skift-tekst-til-talvaerdier-i-shapefilen.md).

# QGIS: Skift tekst til talværdier i shapefilen

Konvertér tekstattributter til numeriske værdier i QGIS til analyse og import.

I QGIS kan du konvertere en streng til et tal ved hjælp af værktøjet "Feltberegner". Åbn først attributtabellen for det lag, du vil ændre. Klik derefter på knappen "Åbn feltberegner". I feltet "Udtryk" skal du skrive "to\_real(" efterfulgt af navnet på det felt, der indeholder den streng, du vil konvertere, og derefter en afsluttende parentes. For eksempel: Hvis du vil konvertere et strengfelt med navnet "string\_field" til et numerisk felt, skal du indtaste "to\_real("string\_field")" i feltet Udtryk. Du kan også ændre navnet på outputfeltet og datatypen ved at vælge de relevante indstillinger. Til sidst klikker du på "OK" for at fuldføre konverteringen. Det oprindelige strengfelt bliver i attributtabellen, mens det nye numeriske felt bliver tilføjet til tabellen.

<figure><img src="https://1581835146-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYICBELdyAXXebKAzfLOR%2Fuploads%2Fi3rxrGu9XbcEMSGWGGEX%2FScreenshot%202023-04-03%20at%2017.22.03.png?alt=media&amp;token=1425fbc0-f7fa-4d0d-b794-b50c8db37b8d" alt=""><figcaption></figcaption></figure>

1. Åbn "Egenskaber"
2. Gå til "Feltberegner"
3. Markér "Opdater eksisterende felt"
4. to\_real("attributeName")
5. Gem redigeringer
6. Gentag det samme for hvert attributfelt

   <figure><img src="https://1581835146-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYICBELdyAXXebKAzfLOR%2Fuploads%2Fc6LPt5wG8QlPkfn1B00s%2FScreenshot%202023-04-03%20at%2017.29.49.png?alt=media&amp;token=86437f74-6d54-4cae-8e04-ff319e4769a6" alt=""><figcaption></figcaption></figure>


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