fix ScatterPolar example and add it to mdbook

Signed-off-by: Andrei Gherghescu <8067229+andrei-ng@users.noreply.github.com>

Author: andrei-ng

CHANGELOG.md

@@ -10,6 +10,7 @@ https://github.com/plotly/plotly.rs/pull/350
 ### Fixed  
 
 - [[#348](https://github.com/plotly/plotly.rs/pull/348)] Fix Pie chart color setting 
+- [[#355](https://github.com/plotly/plotly.rs/pull/355)] Add LayoutPolar support 
 
 ### Changed
 

docs/book/src/recipes/basic_charts/scatter_plots.md

@@ -36,6 +36,13 @@ The `to_inline_html` method is used to produce the html plot displayed in this p
 
 {{#include ../../../../../examples/basic_charts/output/inline_bubble_scatter_plots.html}}
 
+## Polar Scatter Plots
+```rust,no_run
+{{#include ../../../../../examples/basic_charts/src/main.rs:polar_scatter_plot}}
+```
+
+{{#include ../../../../../examples/basic_charts/output/inline_polar_scatter_plot.html}}
+
 
 ## Data Labels Hover
 ```rust,no_run
@@ -66,4 +73,4 @@ The `to_inline_html` method is used to produce the html plot displayed in this p
 {{#include ../../../../../examples/basic_charts/src/main.rs:large_data_sets}}
 ```
 
-{{#include ../../../../../examples/basic_charts/output/inline_large_data_sets.html}}
+{{#include ../../../../../examples/basic_charts/output/inline_large_data_sets.html}}

examples/basic_charts/src/main.rs

@@ -104,6 +104,7 @@ fn bubble_scatter_plots(show: bool, file_name: &str) {
 }
 // ANCHOR_END: bubble_scatter_plots
 
+// ANCHOR: polar_scatter_plot
 fn polar_scatter_plot(show: bool, file_name: &str) {
     let n: usize = 400;
     let theta: Vec<f64> = Array::linspace(0., 360., n).into_raw_vec_and_offset().0;
@@ -148,6 +149,7 @@ fn polar_scatter_plot(show: bool, file_name: &str) {
         plot.show_html(path);
     }
 }
+// ANCHOR_END: polar_scatter_plot
 
 // ANCHOR: data_labels_hover
 fn data_labels_hover(show: bool, file_name: &str) {

plotly/src/layout/polar.rs

@@ -358,13 +358,6 @@ pub struct AutoRangeOptions {
     include: Option<Vec<NumOrString>>,
 }
 
-impl AutoRangeOptions {
-    /// Create a new set of autorange options with default settings.
-    pub fn new() -> Self {
-        Default::default()
-    }
-}
-
 /// Setting [`AutoTypeNumbers::Strict`] prevents Plotly from coercing numeric
 /// strings in trace data into numbers. This may affect the inferred
 /// [`axis_type`](RadialAxis::axis_type). Coercing/converting is the default
@@ -477,9 +470,10 @@ pub enum PolarTickMode {
         /// [`axis_type`](RadialAxis::axis_type) is [`RadialAxisType::Log`] then
         /// you must take the log of your starting tick. For example, to set the
         /// starting tick to 100, set [`tick_0`](PolarTickMode::Linear::tick_0)
-        /// to 2 (except when [`d_tick`](PolarTickMode::Linear::d_tick) = *L<f>*
-        /// (see [`d_tick`](PolarTickMode::Linear::d_tick) for more
-        /// information). If the [`axis_type`](RadialAxis::axis_type) is
+        /// to 2 (except when [`d_tick`](PolarTickMode::Linear::d_tick) =
+        /// "L\<f\>" (see [`d_tick`](PolarTickMode::Linear::d_tick) for
+        /// more information). If the
+        /// [`axis_type`](RadialAxis::axis_type) is
         /// [`RadialAxisType::Date`], it should be a date string. If the
         /// [`axis_type`](RadialAxis::axis_type) is [`RadialAxisType::Category`]
         /// or [`AngularAxisType::Category`] then supply an integer, which will
@@ -496,7 +490,7 @@ pub enum PolarTickMode {
         ///
         /// [`RadialAxisType::Log`] has several special values:
         ///
-        /// - *L<f>*, where `f` is a positive number, gives ticks linearly
+        /// - "L\<f\>", where `f` is a positive number, gives ticks linearly
         ///   spaced in value (but not position). For example,
         ///   [`tick_0`](PolarTickMode::Linear::tick_0) = 0.1,
         ///   [`d_tick`](PolarTickMode::Linear::d_tick) = *L0.5* will put ticks
@@ -511,7 +505,7 @@ pub enum PolarTickMode {
         ///
         /// [`RadialAxisType::Date`] also has special values:
         ///
-        /// - *M<n>* gives ticks spaced by a number of months, where `n` is a
+        /// - "M\<n\>" gives ticks spaced by a number of months, where `n` is a
         ///   positive integer. To set ticks on the 15th of every third month,
         ///   set [`tick_0`](PolarTickMode::Linear::tick_0) to *2000-01-15* and
         ///   [`d_tick`](PolarTickMode::Linear::d_tick) to *M3*. To set ticks
@@ -582,7 +576,7 @@ mod tests {
             .visible(true)
             .axis_type(RadialAxisType::Linear)
             .auto_type_numbers(AutoTypeNumbers::Strict)
-            .auto_range_options(AutoRangeOptions::new().min_allowed(1))
+            .auto_range_options(AutoRangeOptions::default().min_allowed(1))
             .auto_range(AutoRange::Bool(true))
             .range_mode(RangeMode::Normal)
             .min_allowed(0_u32)