Hi All

How can I update or change list items values with Powershell in Sharepoint.

Im using this code
[void][System.reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
$spSite = new-object Microsoft.SharePoint.SPSite("mysite")
$spWeb = $spSite.OpenWeb("myweb")
$spList = $spWeb.Lists["mylist"]
$spitems = $splist.items

I cant see any methods for updating items in list
When I use $spitem.fields | select title
the output is title of all fields.
And if Im deleting one of the fields it deletes entire field with its properties not its values.
Maybe there are a possibility to delete the values of one field and after that add new values to it but how to delete old values?

Thanks for advance
Mihail Stacanov