The pair's departure from the County Ground comes with Town already relegated and guaranteed to finish bottom of npower League One table ahead of the final match of the season away to Tranmere on Saturday.
Striker Andrew, who made nine starts and scored one goal, and midfielder N'Diaye, with six appearances to his name, both arrived from Selhurst Park in March but have been unable to prevent Swindon's downfall.
Source: PA
Source: PA