Contour

[Akhil dua]

Hello every one
can any one tell me how to draw contour with this  data set


  c           z        shock
 1  0.45450237      0
 2  0.02663337      0
 3 -2.08444556      0
 4 -0.12715275      0
 5  0.67066360      0
 6 -0.73540081      0

I want to draw contour for shock i.e my z matrix is shock

when I am applying contour its giving me error : increasing x and y are
expected
when I am applying contourplot its giving me error : no applicable method
for contour plot applied to an object of class "c('double','numeric')"

        [[alternative HTML version deleted]]

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[Duncan Murdoch-2]

On 12-07-19 2:01 AM, Akhil dua wrote:

> Hello every one
> can any one tell me how to draw contour with this  data set
>
>
>    c           z        shock
>   1  0.45450237      0
>   2  0.02663337      0
>   3 -2.08444556      0
>   4 -0.12715275      0
>   5  0.67066360      0
>   6 -0.73540081      0
>
> I want to draw contour for shock i.e my z matrix is shock
>
> when I am applying contour its giving me error : increasing x and y are
> expected
> when I am applying contourplot its giving me error : no applicable method
> for contour plot applied to an object of class "c('double','numeric')"

The contour function wants the data to be in a grid.  You need to fit a
function to your data (which is pretty easy if the response is always
zero!), and then evaluate it at a grid of c and z values.

Duncan Murdoch

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[Adams, Jean]

As Duncan Murdoch pointed out, the example data frame that you provided
doesn't give very interesting results (all the shock values are zero), so
I created a different shock variable for illustration.  I suggest using
the interp() function in the R package akima.

df <- structure(list(c = 1:6, z = c(0.45450237, 0.02663337,
        -2.08444556, -0.12715275, 0.6706636, -0.73540081),
        shock = c(0L, 0L, 0L, 0L, 0L, 0L)),
        .Names = c("c", "z", "shock"),
        class = "data.frame", row.names = c(NA, -6L))
df$shock2 <- df$c + df$z + df$z^2

library(akima)
contour(interp(df$c, df$z, df$shock2))

Jean


Akhil dua <[hidden email]> wrote on 07/19/2012 01:01:54 AM:

> Hello every one
> can any one tell me how to draw contour with this  data set
>
>
>   c           z        shock
>  1  0.45450237      0
>  2  0.02663337      0
>  3 -2.08444556      0
>  4 -0.12715275      0
>  5  0.67066360      0
>  6 -0.73540081      0
>
> I want to draw contour for shock i.e my z matrix is shock
>
> when I am applying contour its giving me error : increasing x and y are
> expected
> when I am applying contourplot its giving me error : no applicable

method
> for contour plot applied to an object of class "c('double','numeric')"

        [[alternative HTML version deleted]]

______________________________________________
[hidden email] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.