string.match invalid escape sequence

[ds]

if string.match(stringvalue, "(-?[0-9]+\.[0-9]+) (-?[0-9]+\.[0-9]+) (-?[0-9]+\.[0-9]+)") then

What my console is telling me > Invalid escape sequence near "(-?[0-9]+'

Thanks for any help given.

[Luni]

The escape character for Lua patterns is [b]%[/b], not [b]\[/b].