Yes, I did. But I get the following error with the command
image(x=long,y=lat,z=values)

"Error in image.default(x=long,y=lat,z=values):
 error in evaluating the argument 'x' in selecting a method for function
'image': Error in long: recursive indexing failed at level 2"


Thanks,
Cassie

On Tue, Apr 9, 2013 at 8:16 PM, Pascal Oettli <kridox@ymail.com> wrote:

> Hi,
>
> Did you carefully read the help for "image" ?
>
> ## Default S3 method:
> image(x, y, z, zlim, xlim, ylim, col = heat.colors(12),
>       add = FALSE, xaxs = "i", yaxs = "i", xlab, ylab,
>       breaks, oldstyle = FALSE, useRaster, ...)
>
> Regards,
> Pascal
>
>
>
> On 04/10/2013 10:07 AM, cassie jones wrote:
>
>> Hello R-users,
>>
>> I am trying to do an image plot where I have been given latitudes,
>> longitudes and the values at the corresponding locations. A sample of the
>> data is given as follows:
>>
>>     values=c(0,1,0,0,0,0,2,2,0,0)
>> lat=c(29.6660,29.6756,29.3492,**29.2654,29.2827,29.4070,35.**
>> 3510,35.6590,35.7587,38.2794)
>> long=c(-95.8121,-95.6565,-95.**5771,-95.4400,-95.4356,-95.**
>> 0294,-81.7940,-81.4850,-81.**3777,-86.9999)
>>
>>
>> I used the following command to generate the image plot along with an U.S.
>> map:
>>
>> library(maps)
>> image(values,x=sort(long),y=**sort(lat))
>> map("state",add=T)
>>
>> But every time I run the code I get the following error:
>>
>> Error in image.default(values,x=sort(**long),y=sort(lat),
>>
>> increasing 'x' and 'y' values expected
>>
>> Even though I sort the latitude and longitude in increasing order, I am
>> getting this error. Any help is greatly appreciated.
>>
>> Thanks in advance,
>>
>> Cassie.
>>
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>>
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>> PLEASE do read the posting guide http://www.R-project.org/**
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>>

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