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This is an R HTML vignette. The file extension is *.Rhtml, and it has to include a special comment to tell R that this file needs to be compiled by knitr:

<!--
%\VignetteEngine{knitr::knitr}
%\VignetteIndexEntry{The Title of Your Vignette}
-->

Now you can write R code chunks:

summary(cars)

##      speed           dist    
##  Min.   : 4.0   Min.   :  2  
##  1st Qu.:12.0   1st Qu.: 26  
##  Median :15.0   Median : 36  
##  Mean   :15.4   Mean   : 43  
##  3rd Qu.:19.0   3rd Qu.: 56  
##  Max.   :25.0   Max.   :120

fit=lm(dist~speed, data=cars)
summary(fit)

## 
## Call:
## lm(formula = dist ~ speed, data = cars)
## 
## Residuals:
##    Min     1Q Median     3Q    Max 
## -29.07  -9.53  -2.27   9.21  43.20 
## 
## Coefficients:
##             Estimate Std. Error t value Pr(>|t|)    
## (Intercept)  -17.579      6.758   -2.60    0.012 *  
## speed          3.932      0.416    9.46  1.5e-12 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 15.4 on 48 degrees of freedom
## Multiple R-squared:  0.651,	Adjusted R-squared:  0.644 
## F-statistic: 89.6 on 1 and 48 DF,  p-value: 1.49e-12

You can also embed plots, for example:

par(mar=c(4,4,.1,.1))
plot(cars, pch=19)
plot of chunk cars-plot

For package vignettes, you need to encode images in base64 strings using the knitr::image_uri() function so that the image files are no longer needed after the vignette is compiled. For example, you can add this chunk in the beginning of a vignette:

library(knitr)
# to base64 encode images
opts_knit$set(upload.fun = image_uri)

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.