[SPARK-11380][Docs] Replace example code in mllib-frequent-pattern-mining.md using include_example

[pravingadakh]

No description provided.

[mengxr]

@pravingadakh Could you update the PR title to make it more specific?
@yinxusen Could you review this PR?

[mengxr]

ok to test

[yinxusen]

@pravingadakh You need to label $example on$ and $example off$ in comments of example codes. Otherwise, the include_example cannot trim the code snippt out. Example here: https://github.com/apache/spark/pull/9266/files#diff-deb98281f55f2891e75bae91cfe99d43R20

After finishing the work, you can go to spark/docs, install jekyll according to the README.md file. Then you can use SKIP_API=1 jekyll serve --watch to generate the webpages then go to localhost:4000 to check the result. :)

[yinxusen]

order of imports

[pravingadakh]

@yinxusen I will do the changes mentioned. I am confused about one thing though, FPGrowth examples are already available in scala and java language, and it's content does not match with whatever is there in doc. What should be done here? Should I create a new file with example used in doc?

[SparkQA]

Test build #44571 has finished for PR 9340 at commit fb0050b.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):\n * public class JavaAssociationRulesExample\n * public class JavaPrefixSpanExample\n * class HasSolver(Params):\n

[yinxusen]

@pravingadakh I perfer to use the existing example code. @mengxr What is your opinion?

[pravingadakh]

@yinxusen When you say use the existing example code, you mean the one in the doc or the one which is readily available in examples directory?

[pravingadakh]

Jenkins test this please

[SparkQA]

Test build #44597 has finished for PR 9340 at commit ab42465.

• This patch fails Scala style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):\n * public class JavaAssociationRulesExample\n * public class JavaPrefixSpanExample\n * public class JavaSimpleFPGrowth\n

[SparkQA]

Test build #44598 has finished for PR 9340 at commit ab31ba4.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):\n * public class JavaAssociationRulesExample\n * public class JavaPrefixSpanExample\n * public class JavaSimpleFPGrowth\n

[pravingadakh]

Jenkins test this please

[mengxr]

@pravingadakh You can run dev/lint-scala and dev/lint-python to check code style locally.

[mengxr]

@yinxusen Let's make this PR simple. Just move the example code from user guide to examples. We can have a follow-up PR to merge it with existing example app code.

[pravingadakh]

@mengxr Ran the style checks locally, passed. Also I have moved FPGrowth example code from user guide to examples.

[yinxusen]

swap this two lines. imports in one group should follow alphabetic order, see here: https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide#SparkCodeStyleGuide-Imports

[yinxusen]

reorgnize the import. we can use multi $example on$ -- $example off$ blocks to select our imports.

[yinxusen]

@mengxr Everything is OK except for some style problems. @pravingadakh Thanks for working on this.

[SparkQA]

Test build #44621 has finished for PR 9340 at commit 2ca85d8.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):\n * public class JavaAssociationRulesExample\n * public class JavaPrefixSpanExample\n * public class JavaSimpleFPGrowth\n

[SparkQA]

Test build #44622 has finished for PR 9340 at commit 6f09636.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):\n * public class JavaAssociationRulesExample\n * public class JavaPrefixSpanExample\n * public class JavaSimpleFPGrowth\n

[pravingadakh]

@yinxusen Done with all import re-orderings.

[pravingadakh]

@mengxr @yinxusen Can we merge this, if there aren't any further issues?

[mengxr]

Merged into master. Thanks! @yinxusen Please use LGTM to sign off so there is a green box associated with this PR on https://spark-prs.appspot.com/#mllib.