devtools::install_github("jonocarroll/mathpix")Obtain a Mathpix API key by e-mailing support@mathpix.com then set the following values in your ~/.Renviron file
MATHPIX_APP_ID=yourID
MATHPIX_APP_KEY=yourKEYI have included a general API key with this package, but misuse of it will result in it being cancelled. There is also a trial API key which can be invoked using the trial = TRUE argument to some functions.
If you have an image you would rather properly encode in LaTeX, for example
then simply calling
mathpix("./integral.jpg")(with the appropriate path to the file) will insert a LaTeX block into your document which will render what the image represents
$$
\int \frac { 4 x } { \sqrt { x ^ { 2 } + 1 } } d x
$$
which renders to
Even complicated, hand-drawn figures work
mathpix("./inst/matrix_3x3.jpg")$$
A = \left( \begin{array} { l l l } { 2 } & { 7 } & { 3 } \\ { 3 } & { 5 } & { 2 } \\ { 9 } & { 4 } & { 1 } \\ \end{array} \right)
$$
If you also wish to generate the images (although rmarkdown will gladly do this for you) this can be achieved using
render_latex(latex, fileDir)where latex is the LaTeX generated by mathpix() (or any other escaped LaTeX) and fileDir is the (optional) directory where you wish to save the image (by default, a temp file). This requires that you have pdflatex set up correctly and available on your machine.
Refer to http://docs.mathpix.com/