[R] 3D Scatter Plot

[Deepayan Sarkar]

On 6/17/05, Lauren, Peter <Peter.Lauren at essexcorp.com> wrote:
> Hello:
> 
> 
> 
> I would like to be able to do a 3D scatter plot from 3 variables, 2
> independent and 1 dependent.  The closest R function I could find for
> this is "cloud".  However cloud uses, as input, a matrix where the value
> of each matrix element is the dependent variable value at that matrix
> coordinate.  

What makes you think that?

> My problem is that the independent variable values are
> floating point and can be of any value.  Consequently some of the matrix
> bins may not have a value assigned.  An example of the sort of data I
> may have is as follows
> 
> 
> 
> Independent 1          Independent 2            Dependent
> 
> 0.145674                 0.526482534              1.676986
> 
> 0.325634                 0.326385237              2.384384
> 
> 0.235267                 0.352653288              0.356483
> 
> 
> 
> Is there any way to do a 3D scatter plot with this sort of data?

The following should work fine:

df <- 
    data.frame(x = c(0.145674, 0.325634, 0.235267),
               y = c(0.526482534, 0.326385237, 0.352653288),
               z = c(1.676986, 2.384384, 0.356483))

cloud(z ~ x * y, df)

Deepayan