[R] persp() problem

[Xavier Abulker]

There is an error in your code:
in persp(x , y , z) the length of x is the number of rows of z, the length
of y is the number of columns of z,
You should also name the rows and columns in z with x and y 



Economics Guy wrote:
> 
> I am having some trouble getting the persp() package to change the x
> and y axis on a 3d plot. It defaults to the [0,1] interval and when I
> try to change it I get errors.
> 
> Example:
> 
> This works:
> ------------
> D <- c(1,2,3,4,5,6,7,8,9,10)
> M <- c(11,12,13,14,15,16,17,18,19,20)
> 
> DM <- cbind(D,M)
> 
> persp(DM, theta = 40, phi = 30, expand = 0.5, col = "lightblue",
>       ltheta = 120, shade = 0.75, ticktype = "detailed",
>       xlab = "X", ylab = "Y", zlab = "Z")
> ---------------------
> 
> 
> But I want the axis to count 1 by ones. So I try:
> -----------------
> D <- c(1,2,3,4,5,6,7,8,9,10)
> M <- c(11,12,13,14,15,16,17,18,19,20)
> 
> DM <- cbind(D,M)
> 
> x <- 1*0:10
> y <- 1*0:20
> persp(x,y,DM, theta = 40, phi = 30, expand = 0.5, col = "lightblue",
>       ltheta = 120, shade = 0.75, ticktype = "detailed",
>       xlab = "X", ylab = "Y", zlab = "Z")
> -------------------------
> 
> I get:
> 
> Error in persp(x, y, z, xlim, ylim, zlim, theta, phi, r, d, scale,
> expand,  : invalid 'z' argument
> 
> but the z was fine in the first version so I am not sure what the deal is.
> 
> Any ideas?
> 
> -Econ Guy
> 
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> 
> 

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