Creating a Financial Charts module

[ramkumarkb]

Hi,

Thanks for the wonderful package.

I would like to create a package for financial charts (something along the lines - https://akela.mendelu.cz/~thala/statcharts/statistical-charts.pdf ). This uses MetaPost and MetaPost has a lot of drawing primitives (e.g. ability to place the labels accurately etc).

Does this package have all the primitives to do such types of charts - import a json data, add axes, scale the chart based on the max & min of the input data, draw lables etc.

I was not sure if I should use the discussion or create an issue in repo.

Thank you !

[fenjalien]

Hi, thanks for your interest!

You have some good timing as we're working on adding a plotting lib #92. We're aiming for it to be similar to tikz's datavisualization library and currently debating whether or not it should be kept in CeTZ or be put into its own package/repo.

In terms of primitives we should do? Take a look and if you need something feel free to make a feature request!

[johannes-wolf]

Hello :)

this is totally possible, with PR #92 we've got some fundamentals like drawing and scaling axes as functions. Have a look at the PR, I even added barcharts, in the new lib/chart.typ file. You could use that as foundation to implement others.

[ramkumarkb]

@fenjalien & @johannes-wolf -

Thank you for the reply. So I will check out the repo and run from the local as the code is just recently merged?

And to read data from a JSON array or object, is there any convinience helper function? May be I will use the Typst default JSON and send it to the charts.

Let me start with some simple Donut charts...

[johannes-wolf]

Yes, you can use a local installation.

The chart module can load data from an array of arrays (e.g. CSV) or an array of objects/dicts.
See the label-key and value-key of the barchart function. So depending on the data, default csv or json functions of typst should be enough.