> 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/lva/gis-isie-padomi/qgis-mainit-virknes-vertibas-uz-skaitliskam-vertibam-shapefile.md).

# QGIS: mainīt virknes vērtības uz skaitliskām vērtībām shapefile

QGIS programmā virkni var pārvērst par skaitli, izmantojot rīku "Lauku kalkulators". Vispirms atveriet tās slāņa atribūtu tabulu, kuru vēlaties modificēt. Pēc tam noklikšķiniet uz pogas "Atvērt lauku kalkulatoru". Laukā "Izteiksme" ierakstiet "to\_real(" un tad tā lauka nosaukumu, kurā atrodas pārvēršamā virkne, un aizveriet ar iekavu. Piemēram, lai pārvērstu virknes lauku ar nosaukumu "string\_field" par skaitlisku lauku, laukā "Izteiksme" ievadiet "to\_real("string\_field")". Varat arī mainīt izejas lauka nosaukumu un datu tipu, izvēloties atbilstošās opcijas. Visbeidzot, noklikšķiniet uz "OK", lai pabeigtu pārvēršanu. Sākotnējais virknes lauks paliks atribūtu tabulā, bet tabulai tiks pievienots jaunais skaitliskais lauks.

<figure><img src="/files/f55a834d4cff28c1412f5895b1b79f5542bdd32f" alt=""><figcaption></figcaption></figure>

1. Atvērt "Rekvizītus"
2. Dodieties uz "Lauku kalkulators"
3. Atzīmējiet "Atjaunināt esošo lauku"
4. to\_real("attributeName")
5. Saglabāt labojumus
6. Atkārtojiet to pašu katram atribūtam

   <figure><img src="/files/9dae59cff0224d91617b4d81efe129913f288a61" alt=""><figcaption></figcaption></figure>


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