[R] How to save R file into specific type

[zhiji19]

Hello everyone 

Can you please teach me how to save my homework as .R file? 

I write my code in RGui. When I tried to save my work, the RGui only allows
me to save it as .RData. 
Is there any difference between .R and .RData?

By the way, after I save my work as .RData, I cannot reopen it. when I open
it, only one message comes out as following: "ARGUMENT_ignored_."  

-- 
View this message in context: http://r.789695.n4.nabble.com/How-to-save-R-file-into-specific-type-tp3009879p3009879.html
Sent from the R help mailing list archive at Nabble.com.