Jenny (Xiao) Zhang

Analytics

10 Machine Learning Terms in Simple English

10 Machine Learning Terms in Simple English

  If you are relatively new to Machine Learning, you will probably have seen many technical terms that are some how confusing and difficult to understand. To help myself and also other people to learn these terms, I decided to…

Performance – Tableau Tips,Tricks,Best Practices

Performance – Tableau Tips,Tricks,Best Practices

https://public.tableau.com/s/gallery/top-movie-directors-film Performance Tableau Blog Posts Series – Tips,Tricks,Best Practices – Blog Eight If you are working with large dataset and the performance is an issue, try stopping Auto Update Worksheet (you can keep the auto update quick filter if it will not affect…

6 Things You Need To Know About Spark

6 Things You Need To Know About Spark

What is Spark? Spark is an open-source cluster computing framework originally developed in the AMPLab at UC Berkeley. It is a fast and general engine for big data processing, with built-in modules for streaming, SQL, machine learning and graph processing. Why…

Visualization – Tableau Tips,Tricks,Best Practices

Visualization – Tableau Tips,Tricks,Best Practices

Visualization Tableau Blog Posts Series – Tips,Tricks,Best Practices – Blog Seven Visualization Importance : Position>Color>Size>Shape What visualization to use Time on an x-axis Location on a map Comparing values – bar chart Exploring relationships – scatter plot Relative proportions – treemap 5-second…

4 Things You Need To Know About YARN

4 Things You Need To Know About YARN

What is YARN? YARN stands for Yet Another Resource Negotiator. It is a generic resource platform for managing resources in a cluster. YARN was introduced with Hadoop 2.0, an open source distributed processing framework from Apache. Why YARN? The main challenges for Hadoop 1.x are…

Tableau Tips,Tricks,Best Practices – Formatting

Tableau Tips,Tricks,Best Practices – Formatting

Tableau Blog Posts Series – Tips,Tricks,Best Practices Blog six – Formatting When you have multiple, similar measures, you can Ctrl-click to select them all and change the formatting simultaneously. Use tooltip to tell a story http://datajedininja.blogspot.co.uk/2013/10/tableau-design-month-tooltips.html Vizdom Change data source in Tableau and…

Tableau Tips,Tricks,Best Practices – Sort/Filter

Tableau Tips,Tricks,Best Practices – Sort/Filter

Tableau Blog Posts Series – Tips,Tricks,Best Practices Blog five – Sort/Filter There are two ways to sort in Tableau: Specify the sort order in the dimension. This is the easiest approach, but you cannot sort by fields that include table calculations. Add a…

Tableau Tips,Tricks,Best Practices – Calculation

Tableau Tips,Tricks,Best Practices – Calculation

Tableau Blog Posts Series – Tips,Tricks,Best Practices Blog four – Calculation NEW: LOD Expression Top 15 LOD Expressions https://www.tableau.com/LOD-expressions Understanding LOD Expressions http://blog.databender.net/2015/01/22/understanding-level-of-detail-expressions-part-1/  http://blog.databender.net/2015/01/23/understanding-level-of-detail-expressions-part-2/ Introduction to LOD Expressions http://www.tableau.com/about/blog/2015/2/introduction-level-detail-expressions-36655 Be careful when creating calculated fields with fields from secondary data sources, especially when replacing data…

Tableau Tips,Tricks,Best Practices – Data Blending

Tableau Tips,Tricks,Best Practices – Data Blending

  Tableau Blog Posts Series – Tips,Tricks,Best Practices Blog three – Data Blending When you add the first dimension/measure to the view, the data source that the first dimension/measure belongs to become the primary data source. All dimensions should come from the primary…

Tableau Tips,Tricks,Best Practices – Data Extract

Tableau Tips,Tricks,Best Practices – Data Extract

Tableau Blog Posts Series – Tips,Tricks,Best Practices Blog two – Data Extract  I used to create extracts in different workbooks and I feel it is very difficult to manage them. Now I use one workbook just to create data extracts (no visualization in…

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