T-Distribution

Dear sir,
I would ask if there are in R some code to generate a random sample 
from a mvariate student distribution like that one wich generate the 
multivariate normal one i mean( rmvnorm(n, mu, sigma)
Second question : if R can plot density 3Dcurve I don't mean de 
histogram but de hole density function(normal for example).
I use a windows version of The R software

Thank you in advance
wiyh kind regard

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