fig.cap="caption" does not work for plotly plots.

[mdphan]

Knitr does not print out captions for plotly plots. See example below.

```{r cars, fig.cap="About cars"}
library(plotly)
plot_ly(data=cars, x=speed,y=dist, type="scatter", mode="markers")

[yihui]

fig.cap only works for HTML widgets when the output format is not HTML.

[tingleyd]

Is there an alternative way to put a caption when using plotly and html output?

[yihui]

Yes, just install the development version via

devtools::install_github('yihui/knitr')

A minimal example:

```{r cars, fig.cap="About cars"}
library(plotly)
plot_ly(data=cars, x=~speed,y=~dist, type="scatter", mode="markers")
```

[github-actions]

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