# [R] persp() problem

From: Michael Sun <mam3xs_at_gmail.com>
Date: Wed 13 Dec 2006 - 11:19:27 GMT

Dear list,

I have a problem on persp()

```x <- u1data #first coloum in attached data
y <- u2data #second coloum in attached data
f <- function(x,y){qgev(pnorm(rhoF*qnorm(pnorm((qnorm(y)-rho2*qnorm(x)/sqrt(1-rho2^2))))
+sqrt(1-rhoF^2)*qnorm(0.95)),-0.3935119, 0.4227890,
```
0.2701648)}
z <- outer(x,y,f)
persp(x,y,z)

The R will display:
"Error in persp.default(x, y, z) : increasing 'x' and 'y' values expected"

So I try to adjust it to:

```testx <- unique(sort(u1data))
testy <- unique(u2data[order(u1data)])
testf <- function(testx,testy){qgev(pnorm(rhoF*qnorm(pnorm((qnorm(testy)-rho2*qnorm(testx)/sqrt(1-rho2^2))))

```

+sqrt(1-rhoF^2)*qnorm(0.95)),-0.3935119, 0.4227890, 0.2701648)} testz <- unique(outer(testx,testy,testf)[order(u1data)])

BUT SAME WARN: "Error in persp.default(testx, testy, testz) :

increasing 'x' and 'y' values expected "

So how can I use persp in this situation?????? Thanks for any help!

Besides that I also want to enquiry on how to build the martix below?

[,1] [,2] [,3] [,4] [,5].......[,676]
[1,] 1 NA NA NA NA
[2,] NA 5 NA NA NA
[3,] NA NA 7 NA NA
[4,] NA NA NA 9 NA
[5,] NA NA NA NA 12

```  .    .
.    .
.
```

[676,]

Appreciate for any reply.

Thank you,

With regards
Mc

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Received on Thu Dec 14 10:56:56 2006

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