rworldmap in R markdown knitr

[fan....@gmail.com]

Hi, I want to use the map produced from rworldmap in a R markdown file, to knit to HTML.

For some reason the map does not show. I only got a message:

ERROR: invalid number of intervals

Anyone tried to use rworldmap in Knitr?

My code is as follows:

library(rworldmap)

colourPalette1 <-c("#F5A9A9", "#F6D8CE", "#F8ECE0", "#EFFBFB", "#E0F2F7", "#CEE3F6", "#A9BCF5")

world <- joinCountryData2Map(wvs_c

                             ,joinCode = "ISO3"

                             ,nameJoinColumn = "iso3"

                             ,mapResolution="li"

                             ,verbose=FALSE)

mapCountryData(world, colourPalette=colourPalette1      

               ,mapTitle='Percent of respondents belonging to an association'

               ,nameColumnToPlot='participation')

[Andy South]

Hello there.

I have used rworldmap with knitr and markdown and it has been OK.

Do you get the same error when you use direct from R ?

The error suggests it could be something to do with the number of categories (numCats) from mapCountryData.

If you can post a link to the data I may be able to help more.

Best wishes,

Andy

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[fan....@gmail.com]

Hi,

Actually after I restarted my computer this morning, it works. To be specific, I am using r markdown to create a slidify presentation.

I have another question- is there anyway to suppress a message like this:

82 codes from your data successfully matched countries in the map

3 codes from your data failed to match with a country code in the map

96 codes from the map weren't represented in your data

I tried 

r, echo=FALSE, comment=NULL, message=FALSE, warning=FALSE

and making "verbose=FALSE" in the joinCountryData2Map function,

but none of works.

Thanks!

[Andy South]

Thanks ! Good to hear.

I'm forwarding this to the group so that the solution is there.

---------- Forwarded message ----------
From: Peggy Fan <fan....@gmail.com>
Date: 22 October 2014 18:46
Subject: Re: [rworldmap group] rworldmap in R markdown knitr
To: Andy South <sout...@gmail.com>

It worked! Thanks so much!

On Wed, Oct 22, 2014 at 10:42 AM, Andy South <sout...@gmail.com> wrote:

Hello there, I'm away from my computer for a couple of days, I'll try to have a look for you when I get back. I think I did something by putting the join* that produces the message into a separate chunk and not displaying any of the outputs from it.
Andy

On Oct 22, 2014 6:17 PM, "Peggy Fan" <fan....@gmail.com> wrote:

Hi Andy,

I have another question- is there anyway to suppress a message like this:

"82 codes from your data successfully matched countries in the map

3 codes from your data failed to match with a country code in the map

96 codes from the map weren't represented in your data"

I tried 

r, echo=FALSE, comment=NULL, message=FALSE, warning=FALSE

and making "verbose=FALSE" in the joinCountryData2Map function,

but none of works.

Thanks!

[Sandipayan Nandi]

Andy/Peggy, 

I am using  'R Presentation' from R Studio  to create a slide show for my project. I am using the below code and whatever I do I am not able to get rid of the  output message from the code. I do not want the progress message to be included in my presentation slide.

Seems like Peggy had the same problem and you suggested to  have the below portion of code in a different chunk , but that did not help me either.  I cleared cache and tried all stuffs, but could not get  rid of the progress message. 

Can you please help ?

```{r, echo=FALSE}

sPDF <- joinCountryData2Map(subset(world_all, year==year.list[i])

                              ,joinCode = "ISO3"

                              ,nameJoinColumn = "country_code" 

                              , mapResolution = "coarse"

                              ,verbose=FALSE)

```

154 codes from your data successfully matched countries in the map

0 codes from your data failed to match with a country code in the map

90 codes from the map weren't represented in your data

Thanks

Sandipayan

[Peggy Fan]

Hi Sandipayan,

I will give you my codes- I think the trick is to separate them into different chunks (see below). Hope this helps.

```{r, echo=FALSE, comment=NULL, message=FALSE, warning=FALSE, results='hide'}

library(rworldmap)

wvs_c <- read.csv("/Users/peggyfan/Downloads/R_data/Developing_data_products/wvs_c")

wvs_c <- wvs_c[, -1]

colourPalette1 <-c("#F5A9A9", "#F6D8CE", "#F8ECE0", "#EFFBFB", "#E0F2F7", "#CEE3F6", "#A9BCF5")

world <- joinCountryData2Map(wvs_c

                             ,joinCode = "ISO3"

                             ,nameJoinColumn = "iso3"

                             ,mapResolution="li")

```

```{r, echo=FALSE, comment=NULL, message=FALSE, warning=FALSE, fig.height=6, fig.width=10}

mapCountryData(world, colourPalette=colourPalette1      

               ,mapTitle='Percent of respondents belonging to an association'

               ,nameColumnToPlot='participation')

```

[sandipayan nandi]

Thanks Peggy !

I went to the source code of the rworldmap and saw that Andy is using a ‘cat’ command to print those messages . So I could mute those simply by  doing the following ( capture.output  &  file= ’NUL’ )  :

capture.output(sPDF <- joinCountryData2Map(subset(world_all, year==year.list[i])

                                           ,joinCode = "ISO3"

                                           ,nameJoinColumn = "country_code"

                                           , mapResolution = "coarse"

                                           ,verbose=FALSE) , file='NUL'

)

- Sandipayan