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jjdg: ½ð±Ò+1, ¸Ðл²ÎÓë 2017-04-02 22:40:28
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> x <- seq(from = -5, to = 5, by = 0.25)
> y <- seq(from = -2, to = 2, by = 0.1)
> f <- function(x,y){x**2+50*cos(y)}
> z <- outer(x,y,f)
> persp(x,y,z)

http://www.bkjia.com/ASPjc/1030574.html
5Â¥2017-04-03 04:51:51
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