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<p>Dear Nicholas (and Jonathan),</p>
<p>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:</p>
<p>```{r setup, echo=FALSE, message=FALSE}<br>
require('BrailleR', quietly=TRUE);<br>
require('sonify', quietly=TRUE);<br>
```</p>
<p>This should suppress everything, I think. You could even build in
some graceful error handling quite easily using two chunks, e.g.:<br>
</p>
<p>```{r setup, echo=FALSE, message=FALSE, warning=FALSE,
error=FALSE}<br>
errorMessages <- NULL;<br>
if (!require('BrailleR', quietly=TRUE)) {<br>
errorMessages <- c(errorMessages, "BrailleR did not load
successfully!");<br>
}<br>
if (!require('sonify', quietly=TRUE)) {<br>
errorMessages <- c(errorMessages, "Sonify did not load
successfully!");<br>
}<br>
```</p>
<p>```{r package-errors}<br>
if (!is.null(errorMessages)) {<br>
stop(paste0('I encountered the following errors when loading
packages:\n\n', paste0(errorMessages, collapse='\n')));<br>
}<br>
```</p>
<p>(didn't test, but should get you quite some ways towards a
solution even if a bit buggy :-))<br>
</p>
<p>Kind regards,</p>
<p>Gjalt-Jorn<br>
</p>
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<td style="font-size:12px; font-family: Trebuchet MS,
Helvetica, Sans-serif;"> <b>Gjalt-Jorn Peters</b> <span
style="color:rgb(153,153,153);"> |
<a class="moz-txt-link-freetext" href="http://behaviorchange.eu">http://behaviorchange.eu</a><br>
<br>
Behavior change research | Health psychology <br>
Intervention development | Applied social psychology </span>
</td>
<td style="font-family: Courier New, Courier, Fixed-width;
font-size:70px;color:rgb(153,153,153);" valign="center">[</td>
<td style="font-size: 1px;color:white;" valign="center"> <a
href="http://greatergood.eu"><img alt="GG"
src="cid:part1.2333162E.6AA2EC36@behaviorchange.eu"
border="0"></a> </td>
<td style="font-size: 1px;color:white;" valign="center"> <img
alt=""
src="cid:part3.E5BF0B30.54A0AAA2@behaviorchange.eu"
height="1" border="0" width="10"> <a
href="http://ou.nl"><img alt="OU"
src="cid:part4.9BE8FFD3.D141F473@behaviorchange.eu"
border="0"></a> <img alt=""
src="cid:part3.E5BF0B30.54A0AAA2@behaviorchange.eu"
height="1" border="0" width="10"> </td>
<td style="font-size: 1px;color:white;" valign="center"> <a
href="http://maastrichtuniversity.nl"><img alt="UM"
src="cid:part7.9D1C4B92.0F969F1F@behaviorchange.eu"
border="0"></a> </td>
<td style="font-family: Courier New, Courier, Fixed-width;
font-size:70px;color:rgb(153,153,153);">}</td>
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<div class="moz-cite-prefix">On 2017-04-02 22:19, Godfrey, Jonathan
via BlindRUG wrote:<br>
</div>
<blockquote
cite="mid:D59DA89C3CD73C44A799E7087F8E6A9E20DF64C3@tur-exch-node1.massey.ac.nz"
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello
Nicholas,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Your
commands will be in a number of chunks but they are all run
sequentially as you would with any other R script.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In
the end, your markdown file is a completely standalone
record of the work you will do.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jonathan<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> BlindRUG [<a class="moz-txt-link-freetext" href="mailto:blindrug-bounces@nfbnet.org">mailto:blindrug-bounces@nfbnet.org</a>]
<b>On Behalf Of </b>Nicholas J via BlindRUG<br>
<b>Sent:</b> Monday, 3 April 2017 7:48 a.m.<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:blindrug@nfbnet.org">blindrug@nfbnet.org</a><br>
<b>Cc:</b> Nicholas J<br>
<b>Subject:</b> Re: [BlindRUG] Switching from Doing with
Eyesight to Doing Without<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Dr.
Godfrey,<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">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?<o:p></o:p></p>
</div>
<p class="MsoNormal">Thank you,<o:p></o:p></p>
</div>
<p class="MsoNormal">Nicholas<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Mar 14, 2017 at 9:59 PM,
Nicholas J <<a moz-do-not-send="true"
href="mailto:314nick15@gmail.com" target="_blank">314nick15@gmail.com</a>>
wrote:<o:p></o:p></p>
<div>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thank you,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Nicholas<o:p></o:p></p>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<br>
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<pre wrap="">_______________________________________________
BlindRUG mailing list
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To unsubscribe, change your list options or get your account info for BlindRUG:
<a class="moz-txt-link-freetext" href="http://nfbnet.org/mailman/options/blindrug_nfbnet.org/gjalt-jorn%40behaviorchange.eu">http://nfbnet.org/mailman/options/blindrug_nfbnet.org/gjalt-jorn%40behaviorchange.eu</a>
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More information and useful links about using R as a blind person can be obtained at:
<a class="moz-txt-link-freetext" href="http://R-Resources.massey.ac.nz">http://R-Resources.massey.ac.nz</a>
Look for help using R commands by reading the accessible e-book "Let's Use R Now" compiled by Jonathan Godfrey at:
<a class="moz-txt-link-freetext" href="http://R-Resources.massey.ac.nz/lurn/front.html">http://R-Resources.massey.ac.nz/lurn/front.html</a>
</pre>
</blockquote>
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