[BlindRUG] Switching from Doing with Eyesight to Doing Without

Mon Apr 3 09:00:00 UTC 2017

Dear Nicholas (and Jonathan),

You can use a separate (first) chunk to load the packages, and for that 
chunk, set options to suppress messages (and even warnings and errors - 
use with caution, of course). For example:

```{r setup, echo=FALSE, message=FALSE}
require('BrailleR', quietly=TRUE);
require('sonify', quietly=TRUE);
```

This should suppress everything, I think. You could even build in some 
graceful error handling quite easily using two chunks, e.g.:

```{r setup, echo=FALSE, message=FALSE, warning=FALSE, error=FALSE}
errorMessages <- NULL;
if (!require('BrailleR', quietly=TRUE)) {
   errorMessages <- c(errorMessages, "BrailleR did not load successfully!");
}
if (!require('sonify', quietly=TRUE)) {
   errorMessages <- c(errorMessages, "Sonify did not load successfully!");
}
```

```{r package-errors}
if (!is.null(errorMessages)) {
   stop(paste0('I encountered the following errors when loading 
packages:\n\n', paste0(errorMessages, collapse='\n')));
}
```

(didn't test, but should get you quite some ways towards a solution even 
if a bit buggy :-))

Kind regards,

Gjalt-Jorn

*Gjalt-Jorn Peters* | http://behaviorchange.eu

Behavior change research | Health psychology
Intervention development | Applied social psychology 	[ 	GG 
<http://greatergood.eu> 	OU <http://ou.nl> 	UM 
<http://maastrichtuniversity.nl> 	}

On 2017-04-02 22:19, Godfrey, Jonathan via BlindRUG wrote:
>
> Hello Nicholas,
>
> Think of your R markdown document as a new R session with an empty 
> workspace. You need to import the data you want and the additional 
> packages you need.
>
> Your commands will be in a number of chunks but they are all run 
> sequentially as you would with any other R script.
>
> In the end, your markdown file is a completely standalone record of 
> the work you will do.
>
> Jonathan
>
> *From:*BlindRUG [mailto:blindrug-bounces at nfbnet.org] *On Behalf Of 
> *Nicholas J via BlindRUG
> *Sent:* Monday, 3 April 2017 7:48 a.m.
> *To:* blindrug at nfbnet.org
> *Cc:* Nicholas J
> *Subject:* Re: [BlindRUG] Switching from Doing with Eyesight to Doing 
> Without
>
> Dr. Godfrey,
>
> Thank you for all the replies. In rmarkdown, is there a way to open a 
> package without having to show the code library(packageName) in the 
> output? I have had a lot of trouble in the past using the same data 
> set in different code chunks. I can load it in one chunk and use it 
> there, but I sometimes have trouble accessing the set in another code 
> chunk. Is there something I can do so that I do not have to load the 
> data set into every chunk?
>
> Thank you,
>
> Nicholas
>
> On Tue, Mar 14, 2017 at 9:59 PM, Nicholas J <314nick15 at gmail.com 
> <mailto:314nick15 at gmail.com>> wrote:
>
> Hello,
>
> I am legally blind, with enough vision to do things on the computer 
> using Zoomtext and using a portable cctv to view things from a 
> distance. I have been relying on this technology to do everything from 
> programming, to statistical work, to reading, to viewing boards, and 
> surfing the web. I can still see the same amount, but the 
> inefficiencies in all these techniques has become apparent. I have 
> been switching over to technologies like Jaws, Kurzweil, and braille. 
> For r programming, I'm thinking Jaws is the best to use, but I am not 
> sure how. I've read about the terminal and used it before. I mainly 
> use Rstudio visually now and saw that many of the features in it like 
> creating rmarkdown files and such would have to be done differently in 
> places like the terminal. I've learned that Rstudio is not very Jaws 
> friendly, but am not at all sure how to use Jaws and r together. How 
> can you view a whole script of r code at once? In a terminal, doesn't 
> one run code line by line? How can all line be corrected and run at 
> once like in Rstudio? How do I code in r just using my hearing and not 
> eyesight? How do I create such things as an rmarkdown file or a shiny 
> app without Rstudio? I looked through the threads in this list and 
> found things that are very helpful, but am not sure how to use them 
> without using my vision. Any help would very much be appreciated.
>
> Thank you,
>
> Nicholas
>
>
>
> _______________________________________________
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> To unsubscribe, change your list options or get your account info for BlindRUG:
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> The list archive can be viewed at:
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> More information and useful links about using R as a blind person can be obtained at:
> http://R-Resources.massey.ac.nz
>
> Look for help using R commands by reading the accessible e-book "Let's Use R Now" compiled by Jonathan Godfrey at:
> http://R-Resources.massey.ac.nz/lurn/front.html

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