From 584c527bfb647ec16609bf79864292399cef54e3 Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Sun, 3 Mar 2024 03:15:40 +0100
Subject: Setup Sphinx documentation generator

---
 docs/tutorials.rst | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 docs/tutorials.rst

(limited to 'docs/tutorials.rst')

diff --git a/docs/tutorials.rst b/docs/tutorials.rst
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+++ b/docs/tutorials.rst
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+Tutorials
+=========
+
+Quickstart
+----------
+
+For the impatient, here is a very quick overview.
+
+.. code:: py
+
+        from mdpoly import State, Variable, Parameter
+        from mdpoly.representations import SparseRepr
+
+        # Construct an expression
+        x, y = Variable.from_names("x, y") # or just Variable("x")
+        k = Parameter("k")
+
+        p = (x + 2 * y) ** 3 + y ** 2 + k
+        print(f"{p = }")
+
+        # Make a concrete representation
+        state = State(parameters={k: 3.14}) # try to replace with empty dict
+        sparse, state = p.to_repr(SparseRepr, state)
+
+        # Look inside the representation
+        for entry in sparse.entries():
+            print(f"at (row, col) = {entry.row, entry.col} there is a polynomial:")
+            for term in sparse.terms(entry):
+                monomial_str = ""
+                for idx in term:
+                    var = state.from_index(idx.var_idx)
+                    monomial_str += f"{var.name}^{idx.power} "
+
+                # Get the coefficient
+                coeff = sparse.at(entry, term)
+                print(" - the monomial", monomial_str, "has coefficient", coeff)
+
+        # You can also simply iterate over it
+        for entry, term, coeff in sparse:
+            print(entry, term, coeff)
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