Repository: plotters-rs/plotters (language: rust)

Issue:
Documenting how to run the example
There are few PR and issue about the example can't run. For example #124

This means our example might be confusing, so add instructions on how to run the example to documentation. 


Discussion / hints:

Fix patch:
diff --git a/examples/README.md b/examples/README.md
new file mode 100644
index 00000000..46600eba
--- /dev/null
+++ b/examples/README.md
@@ -0,0 +1,9 @@
+# plotters examples
+
+These are examples of plotters in use! Like in all Rust packages, examples can be built and run with `cargo`.
+
+To run any example, from within the repo, run `cargo run --example <example_name>` where `<example name>` is the name of the file without the `.rs` extension.
+
+The output of these example files are used to generate the [plotters-doc-data](https://github.com/38/plotters-doc-data) repo that populates the beautiful images you see in the main README. For that reason, they must be run with `cargo` from within the repo, or you must change the output filename in the example code to a directory that exists.
+
+The examples that have their own directories and `Cargo.toml` files work differently. They are run the same way you would a standalone project.


Test patch: