mathpix is now on CRAN, so you can install using
install.packages("mathpix")If you’re after newer development features (if there are any); you can install from GitHub using
devtools::install_github("jonocarroll/mathpix")The free API key has been removed due to overuse. Please sign up at
https://dashboard.mathpix.com/ then save your ID and key in your
.Renviron file as
MATHPIX_APP_ID='yourid'
MATHPIX_APP_KEY='yourkey'
Note that this requires you to accept Mathpix’s terms and conditions and sign up for any relevant pricing scheme.
You can check that your credentials are loaded correctly with
credentials().
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("matrix_3x3.jpg")$$
A = \left( \begin{array} { l l l } { 2 } & { 7 } & { 3 } \\ { 3 } & { 5 } & { 2 } \\ { 9 } & { 4 } & { 1 } \\ \end{array} \right)
$$
If your image only result in warnings and no LaTeX, use retry = TRUE
to attempt some pre-processing of the image into a more amenable form.
Unfortunately, there are still images which fail.
To not insert the resulting equation directly into your document, but
rather store it in a variable, use insert = FALSE.
Refer to http://docs.mathpix.com/