For a heated floor make sure you use a stone like ceramic or porcelian tile. Tile will have a high thermal mass and take a while to heat up, but will also take a while to cool down. It's only natural for a heater to cycle on and off as it maintains a set temperature but a tile will hold it's heat for hours.

While you can use certain laminates or vinyls for heated floors, they have low thermal masses and will heat up or cool down quickly.

It's the same reason we use bricks for houses. The brick would absorb the heat from the sun all day long and at night it would radiate the heat into the house all night.