I would like to select polygons from an existing spatial polygon data set
interactively in a shiny leaflet map.
The process is straightforward in leaflet/ mapedit, however I need to
include the procedure in a shiny app map interface. I cannot work out how
to incorporate the selectMap() in the shiny
Dear Eric, thank you for that observation.
I realised that some of the participants have duplicated “survey_start” dates
and when I corrected this, the code works.
Regards
--
Kevin Wamae
From: Eric Berger
Date: Thursday, 22 February 2018 at 15:16
To: Kevin Wamae
Cc: "R-help@r-p
Dear Ista, thank you. Let me see how best I can implement this.
Regards
--
Kevin Wamae
On 22/02/2018, 16:58, "Ista Zahn" wrote:
I don't fully understand the logic you are trying to implement, but
something along the lines of
foo <- cut(trialData$date,
Residuals are stored as a numeric vector. The R software comes with a document
"Introduction to R" that discusses basic math functions and logical operators
that can create logical vectors:
abs( stdresiduals ) > 2.5
It also discusses indexing using logical vectors:
stdresiduals[ abs( stdresidu
Please keep the list CC'd.
In order to use the algorithms, I would assume you need to understand them. I
hope you find it a productive challenge to express your understanding in code.
Note that the article apparently spells out what you need very explicitly in
pseudocode. If you really need to
Dear list members,
I want to save residuals above or less than a certain value to an R
object. I have performed a multiple linear regression, and now I want
to find out which cases have a residual of above + 2.5 and – 2.5.
Below I provide the R commands I have used.
Reg<-lm(a~b+c+d+e+f) # perf
Please read ?try (again) carefully.In paticular note (under Value):
"The value of the expression if expr is evaluated without error, but an
invisible object of class "try-error"containing the error message, and the
error condition as the "condition" attribute, if it fails."
so:
attr(ERRORMESSAGE
Luke
Thanks — I revised the code to:
ERRORMESSAGE <- try(source(USERSCRIPTFILE, local=T), silent=T)
print(ERRORMESSAGE) now returns:
$value
[1] 0
$visible
[1] FALSE
Not clear what to make of that.
Dennis
Dennis Fisher MD
P < (The "P Less Than" Company)
Phone / Fax: 1-866-PLessThan (
Only the default error handler puts the error message in a buffer
where it can be retrieved with geterrmessage. try() replaces the
default error handler. Either look at the value returned by try() or
use tryCatch with conditionMessage.
Best,
luke
On Thu, 22 Feb 2018, Dennis Fisher wrote:
R 3.
R 3.4.3
OS X
Colleagues
I have a 20K line script in which I encounter an unexpected problem.
If the script detects presence of a particular file USERCODE.txt, it executes:
source(“USERCODE.txt”)
If that file is not present, the script executes without a problem.
There might be syntax er
I don't fully understand the logic you are trying to implement, but
something along the lines of
foo <- cut(trialData$date,
breaks = as.Date(c("2007-01-01",
"2008-05-01",
"2009-04-01",
"2010-05-01"
Hi Kevin,
I ran the code on the full data set and was able to reproduce the problem
that you are facing.
My guess is that you have an error in your intuition and/or logic, and that
this relates to the use of the subscript [1].
Specifically, on the full dataset, the condition
trialData$date[trialDat
Have a look at the drc-package.
btw. a linear model does not fit your data very well.
Cheers.
Am 22.02.2018 um 08:20 schrieb AbouEl-Makarim Aboueissa:
> Dear All: good morning
>
>
> I need helps with the calculation of the *LC50* from the data below
>
>
> x<-c(0,0.3,0.7,1,4,10)
> y<-c(100,
Hi,
1. I think the reason that the different ordering leads to different
results is because of the following:
date[ some condition is true ][1]
will give you an NA if there are no rows where 'some condition holds'.
In the code that 'works' you don't have such a situation, but in the
cod
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