Merge branch 'examples-readme' of git://github.com/pirtleshell/plotters

Author: 38

examples/README.md

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+# 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.