Dear list,
I have to compare two digital elevation models in raster format (geotiff).
I then have to calculate the differences in altitude for each cell and make
some statistics (basic as mean, median, std, range but also more advanced
as RMSE) on that.
I do not know very much how to proceed:
1)
Dear all,
I wrote a simple script in order to put together some functions and method
to be executed on various files
I am trying to have to possibility to call the script changing few
parameters in order to use the different files.
I succeeded partly using the function method.
However in my script
Dear list,
I just tried to use the function cluster.stat in the package fpc.
I just have a couple of questions about the syntax:
cluster.stats(d,clustering,alt.clustering=NULL,
silhouette=TRUE,G2=FALSE,G3=FALSE)
1) the distance object (d) is an object obtained by the function dist() on
my own
Thank you very much for your answer.
I tried to run the function on my data and now I am getting this message of
error
Error in as.dist(dmat[clustering == i, clustering == i]) : (subscript)
logical subscript too long
Below the code I am using (version2.7.0 of R with all packages updated):
data
)
whether data is what you expect it to be.
Christian
On Sat, 14 Jun 2008, Laura Poggio wrote:
Thank you very much for your answer.
I tried to run the function on my data and now I am getting this message
of
error
Error in as.dist(dmat[clustering == i, clustering == i]) : (subscript
know ... I simply try to see if something was changing with different
structure of data
Christian
On Sat, 14 Jun 2008, Laura Poggio wrote:
I am sorry I did not provide enough information.
I am not using img later, but data that is data.frame.
I wrote that img is a image just to explain
.
Sorry,
Christian
On Sat, 14 Jun 2008, Laura Poggio wrote:
Thank. See below.
Laura
2008/6/14 Christian Hennig [EMAIL PROTECTED]:
What does str(ddata) give?
Class 'dist' atomic [1:130816] 69.2 117.1 145.6 179.9 195.6 ...
dcent doesn't make sense as input
Dear all,
sorry for this very basic question, but I did not find any good example yet.
I would like to set up a variable that can be recall later to substitute a
part of a file name.
As example:
var_filename = as.name(aaa)
jpeg(var_filename.jpg)
plot()
dev.off()
It would be very useful in
Thank you perfect! it worked also with the GDAL option.
Laura
2008/7/2 Richard Pearson [EMAIL PROTECTED]:
Laura
Does jpeg(paste(var_filename, jpg, sep=.)) do what you want?
Regards
Richard
Laura Poggio wrote:
Dear all,
sorry for this very basic question, but I did not find any good
Dear list,
I have to draw a simple plot. On y axe some numerical values that correspond
to various categories on axe x.
The table I am reading looks like:
cat Obj1 Obj2 Obj3
max 23 27 34
ave 21 25 32
min 19 23 30
In order to avoid that the first column is reordered alphabetically I used:
(found
to the Proportion of variation in response(s)
explained
by model(s) computed by S-Plus.
There are several options. I have had good results using wle.lm() in
package
wle and lmRob() in package robust. The second option is perhaps closest to
what you want.
Regards, Mark.
Laura POggio wrote:
I
?
Thank you very much in advance.
Laura Poggio
-
Date: Mon, 20 Oct 2008 06:15:49 +0100 (BST)
From: Prof Brian Ripley [EMAIL PROTECTED]
Subject: Re: [R] R-square in robust regression
To: PARKERSO [EMAIL PROTECTED]
Cc: r
== Laura Poggio [EMAIL PROTECTED]
on Thu, 13 Nov 2008 10:43:14 + writes:
LP yes thank you! it is perfect.
LP I was using lmrob in package robustbase and it did not have that
option in
LP the summary.
Yes
lmRob() from robust is from a company which -- often being excellent
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