Using figures within Equations

Questions
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1

For computations involving graphs, it can be nice to be able to use graphs within actual equations. I know that can be done by having images of the graphs and embedding those within the equations, but is there a way to do this with graphs directly built in Typst?

As an example, I’ve tried the basic example below:

#set page(
  width: auto,
  height: auto,
  margin: 2mm,
)

#import "@preview/fletcher:0.5.8" as fletcher: diagram, node, edge, cetz
#import fletcher.shapes: circle, ellipse, cylinder, rect, chevron

$
  diagram(
    node((0, 0), [A])
  )
$

but it just returns the error:

Panicked with: “Failed to resolve coordinate: lr(body: sequence([(], [0], [,], , [0], [)]))”

for Cetz 0.3.4. I don’t know if this is a Cetz specific example or if this reflects the fact that placing content within equations is impossible.

2

It’s because (0,0) is in math mode, not code mode. In code mode, (0,0) means an array; but in math mode, (0,0) means a pair of () surrounding 0, 0.

To switch to code mode, add a #. You can switch back to math mode by writing another $…$.

#let A = [A variable]
$
  x^2 \
  #diagram( // Now enters the code mode
    node((0, 0),   $A$), // This $A$ switches to math mode
    node((0, 0.5), [A]), // This [A] switches to markup mode
    node((0, 1),    A),  // This A is still in code mode
  )
$

图片
图片201×286 8.59 KB

Refer to Syntax – Typst Documentation or Math – Typst Documentation for details.

1 Like
3

Ah, that’s painfully obvious in hindsight. Thanks for the quick response.

1 Like