From 80507a9bddd2f92c5b36817ba9e2e9db6ecaf10d Mon Sep 17 00:00:00 2001 From: David Rotermund <54365609+davrot@users.noreply.github.com> Date: Wed, 3 Jan 2024 19:24:34 +0100 Subject: [PATCH] Update README.md Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com> --- sympy/intro/README.md | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/sympy/intro/README.md b/sympy/intro/README.md index 960aab0..1b446d3 100644 --- a/sympy/intro/README.md +++ b/sympy/intro/README.md @@ -16,15 +16,25 @@ pip install sympy || |---| +|[Basic Operations](https://docs.sympy.org/latest/tutorials/intro-tutorial/basic_operations.html)| +|[Printing](https://docs.sympy.org/latest/tutorials/intro-tutorial/printing.html)| |[Simplification](https://docs.sympy.org/latest/tutorials/intro-tutorial/simplification.html)| |[Calculus](https://docs.sympy.org/latest/tutorials/intro-tutorial/calculus.html) | |[Solvers](https://docs.sympy.org/latest/tutorials/intro-tutorial/solvers.html)| - - ## [Some examples](https://docs.sympy.org/latest/tutorials/intro-tutorial/intro.html#a-more-interesting-example) +## [Substitution](https://docs.sympy.org/latest/tutorials/intro-tutorial/basic_operations.html#substitution) +```python +import sympy + +x, y = sympy.symbols("x y") + +expr = sympy.cos(x) + 1 +z = expr.subs(x, y**2) +print(z) # -> cos(y**2) + 1 +``` ### [Derivatives](https://docs.sympy.org/latest/tutorials/intro-tutorial/calculus.html#derivatives)