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I'm attempting to create a presentation about loading/using shapefiles in R using the knitr package. The issue I'm encountering is that when I include standard # notation in my .Rnw file, as in ND#data, R reads that as the end of the code chunk meaning a bunch of my code doesn't get read in properly.
Here is a fuller example of my .Rnw file (data available from the North Dakota GIS portal http://www.nd.gov/gis/apps/HubExplorer/).
\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage{graphicx}
\begin{document}
<<Loading Datasets>>=
install.packages("rgdal")
library(rgdal)
ND <-readOGR(dsn="C:/Users/.../NDGISHubData",
layer="NDHUB_STATE_polygon")
head(ND#data)
ND#proj4string
plot(ND)
#
\end{document}
Is there a way to have R correctly recognize the # symbol in my code chunk as part of the code and not as the end of the R code chunk?
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Closed 4 years ago.
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I am trying to set up a map from ggmap.I have borrowed this line from another script but it is not working for me. I want to specify the boundary of the map.
myLocation <- c( -133.50734, 26.07781, -60.49268, 47.77387)
myMap <- ggmap::get_map(location=myLocation, source="stamen", maptype="terrain", crop=TRUE)
The map should show the US boundary, but it throws the following error when trying to run it:
Map from URL : http://tile.stamen.com/terrain/5/4/11.jpg
Error in readJPEG(tmp) :
JPEG decompression error: Not a JPEG file: starts with 0x89 0x50
Any comment on how to fix the issue?
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Closed 6 years ago.
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Actually, I'm having trouble with importing a CSV file in my script in Rstudio. I am trying:
d <- read.table(file="table1.csv",sep="\t",header=T)
but it says that there is an error in file and "rt".
Type 'getwd()' in the console. If what returns isn't the same path as the file you're trying to read in, change this with setwd("[your filepath here]"). If you want a graphical solution instead, you can use the Set As / Go To Working Directory commands under the 'More' menu in RStudio's Files viewer (bottom right window).
Then try d <- read.csv("table1.csv")
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Closed 5 years ago.
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Looking to read in an .xlsx file. This is an assignment so I specifically can't use Excel first to convert it to .csv.
Tried using read.xlsx which couldn't be found so I tried 'library(xlsx)' which was not a package according to R.
Does anyone know if there's something glaringly obvious that I'm not doing? Is the package called something different? Is there a different/better way to read an xlsx file?
Thanks!
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Closed 5 years ago.
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I have installed R Version 3.0.2. I am trying to run association analysis on a dataset.
While trying to install the arules package, using the code:
install.packages(“arules”)
I get and error:
Error: unexpected input in "install.packages(“arules")
Can you guide as to how I can install this package and use it to run association on an imported txt file using R?
You appear to be using "smartquotes" instead of straight quotes like " around arules. R cannot recognize these. Change to straight quotes and everything should work.
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Closed 9 years ago.
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I am using knitr and Latex to write an intro into and overview of R. How can I get a box around R code chunks and R output in Latex? I can get them when using R Markdown and knitr to generate HTML. The Sweave way to frame chunks with a box does not work with knitr.
Thanks and regards,
Andreas