Displaying 9 results from an estimated 9 matches for "nerak".
2012 Jun 05
1
nls: how do you know if the model is significant?
...0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
Residual standard error: 13.21 on 13 degrees of freedom
Number of iterations to convergence: 6
Achieved convergence tolerance: 9.123e-06
I know that my parameters are significant but I need to say something about
the whole model.
Many thanks,
Nerak
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2012 Feb 13
2
different way for a for loop for several columns?
...the objects for year 1981 and so on.
Does somebody knows a way to do this? I was thinking about some kind of form
of apply, but it?s not that I have created a function that has to be applied
on a whole column, calculations are done for the different rows?
Many thanks for your help!
Kind regards,
Nerak
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2012 Jun 04
2
Non-linear curve fitting (nls): starting point and quality of fit
...s in the gradient (the number of nonlinear parameters), or less than
the number of rows (the number of observations), nls stops.")
I hope someone can help me with this questions. I would like to know what's
happening and not just having to accept the results I get now :).
Kind regards,
Nerak
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2012 Jan 17
2
result numeric(0) when using variable1[which(variable2="max(variable2)"]
...in the opposite way.
results5$R2[which(results5$Cvalue == "1.8")]
# But neither
results5$Cvalue[which(results5$R2 == "0.6081547")]
# nor
results5$Cvalue[which(results5$R2 == "max(results5$R2)")]
# works?
I hope someone can help me with this problem
Kind regards
Nerak
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2012 Jan 18
3
manipulating data of several columns simultaneously
...umber? If you want for example to do something with the columns depth_1,
depth_1.5, depth_2, depth_2.5, depth_3 ? belonging to a dataframe with also
other columns not related with the name depth (Like here, there is also the
column time). I?m hoping there is something useful for that.
Many thanks,
Nerak
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2012 Mar 13
1
size of graphs when using multiple figures by row
...;)
hist(islands, freq=FALSE,col="blue",main="test")
mtext("testen")
hist(islands, freq=FALSE,col="blue",main="test")
mtext("testen")
(normally, I specify my breaks, ylab and xlab, xlim and y lim)
I hope someone can help me.
Many thanks,
Nerak
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2012 Feb 20
1
apply with as function ifelse with 2 logical conditions
...==0),1,0)))
But I get 3 times the amount of rows than that I want?
what I should achieve:
test.result<-data.frame(C=c(0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0),B=c(0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0),F=c(0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0))
Has someone a suggestions about what I?m doing wrong?
Many thanks,
Nerak
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2012 Feb 15
2
function similar to ddply? + calculations based on previous row
...cbind(test.number$numberb)
}
If someone knows a way to get rid of the loops, let me know! Because I want
to make this script as fast as possible for larger datasets. I'm trying to
get through the apply family to find solutions but it's a hard issue.
Many thanks in advance,
Kind regards,
Nerak
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2012 Jan 11
3
Accomplishing a loop on multiple columns
...replacing results6[i] by
results6[,c([i])] in the for loop is apparently also no a solution). I?m
looking for a manner to repeat a calculation/function on several columns. I
kind of need this as well further in my script, not only in this part?
I would greatly appreciate any suggestions!
Thanks!
Nerak
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