How to increase the chart dpi

[hiteck88]

Description

I am using Rmarkdown to generate the html output. However, the charts created by quantmod seems to have low dpi. I have tried to set dpi=300 in Rmarkdown knitr setting, but it has no effect. Could you please help with this? How to get the better quality of figures from quantmod in Rmarkdown output? Thanks

[joshuaulrich]

It would make it a lot easier to help if you provide a minimal reproducible example (i.e. not your entire Rmd file) and the output you get (the html and/or saved image). It's not clear whether this is something that can be fixed in quantmod or something that needs to be addressed with how you're using rmarkdown.

[evelynmitchell]

Following [1] it is possible to adjust the dpi in Rmarkdown knitr with a configuration change:

out.format <- knitr::opts_knit$get("out.format")
img_template <- switch( out.format,
                     word = list("img-params"=list(fig.width=6,
                                                   fig.height=6,
                                                   dpi=150)),
                     {
                       # default
                       list("img-params"=list( dpi=150,
                                               fig.width=6,
                                               fig.height=6,
                                               out.width="504px",
                                               out.height="504px"))
                     } )

knitr::opts_template$set( img_template )

That might do the trick.

[1] https://stackoverflow.com/a/27321367

[joshuaulrich]

I'm closing this because we don't have a reproducible example and/or evidence that this is something that can be fixed by a change in quantmod.