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Ex15-12-20
# Gráfico em 3 dimensões # Curva # Superfície z=f(x,y) c=1 x <- seq(0,2.5, by=0.05) y <- seq(0,1,by=0.05) mf<-function(s,r){z=sqrt(s*r)*exp(-sqrt(s^3)/2-r^2)# f(x,y); auxiliar para gráfico z } require(grDevices) # for trans3d z <- outer(x, y, mf) z[is.na(z)] <- 4 op <- par(bg = "white") persp(x, y, z, theta = 60, phi = 20, expand = 0.5)->res # Curva (u(t),v(t)) t=seq(0,2.5,by=0.01) u<-function(s){s*cos(s)+2} v<-function(s){(-s^2)*sin(s)/4+1} curve(u,0,2.5) curve(v,0,2.5) plot(u(t),v(t),'l',col="red") # curva (u(t),v(t)) lines(trans3d(u(t),v(t),mf(u(t),v(t)), res), col = "red", lwd = 2) # Inclui curvas no gráfico em 3d plot(t,mf(u(t),v(t)),'l',col="red") # curva f(u(t),v(t))
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