Data Management using tableau
- 1. Let’s learn Tableau Data Visualization Software Version 2019.3.0 Made By: Kanika Nagpal Linkedin Id: https://www.linkedin.com/in/kanika-nagpal/
- 2. Data Security and Data Governance Data Modeling and Data Integration Data Analysis and Data Mining Data Designing and Data Architecture Data Sharing and Data Warehousing WHAT IS DATA MANAGEMENT ?
- 4. Dataset : MT_Cars The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models). The original dataset is available on Kaggle. List of columns in the dataset are explained down below :- 1. Mpg : Miles per gallon 2. Cyl : Number of cylinders 3. Disp : Displacement 4. Hp : Gross horsepower 5. Drat : Rear axle ratio 6. Wt : Weight (1000 lbs) 7. Qsec : 1/4 mile time 8. Vs : Engine (0 = V-shaped, 1 = Straight) 9. Am : Transmission (0 = Automatic, 1 = Manual) 10. Gear : Number of forward gears 11. Carb : Number of carburetors
- 5. ALIAS Giving alternative names to columns in Dimensions so that their labels appear differently in the view.
- 6. Steps to create Alias Drag the columns ‘Vs’, ‘Am’, ‘Cyl’ and ‘Crab’ to ‘Dimension’ section as these columns contain numeric data but that data signifies non numeric information. Under ‘Dimensions’ section, click on the drop down of ‘Vs’. Select ‘Aliases…’ and a dialogue box will appear. Under ‘Values(Alias)’, change the value of 0 to “V-shaped” and 1 to “Straight”.
- 7. In Tableau, giving Alias value does not change the original value. In the Data source tab, the dataset shows Alias values. Once “Show Aliases” box is unchecked, the original values appear. DID YOU KNOW ?
- 8. GROUPING Grouping is done to create a new Dimension and this also reduces the number of Dimensions.
- 9. Steps to create Group Under ‘Dimension’ section, right click on ‘Carb’ -> Create -> Group and a dialogue box will appear. Under ‘Groups’ section, select 1, 2 & 3 using the ‘Ctrl’ key and select ‘Group’ then name it ‘Light Cars’. Similarly, club rest of the values and name the group as ‘Heavy Cars’. Change the ‘Field name’ to ‘Car Types’ and click ‘Apply’ then select ‘Ok’.
- 10. HIERARCHY A hierarchy is an arrangement of columns in which the columns are represented as being ‘above’, ‘below’, or ‘at the same level as’ one another.
- 11. Steps to create Hierarchy Under ‘Dimension’ section, select ‘Car Names’, ‘Car Types’ and ‘Vs’ using the ‘Ctrl’ key. Right click on any of the three variables and select ‘Hierarchy’ -> ‘Create Hierarchy…’ . A dialogue box will appear and there, change the name to ‘Car Details’ then click ‘Ok’.
- 13. Create a Bar graph displaying the ‘Car Names’, ‘Car Types’ and ‘Vs’ and sort the data in descending order basis the average Mpg. Hint: Use ‘Car Details’ hierarchy Question 1: Create a Side by Side Bar graph comparing ‘Vs’ and ‘Am’ basis the average Mpg. Hint: Create alias for column ‘Am’ Question 2:
- 14. FILTERS Filters are used to include or exclude certain values or range of values for a particular field in tableau
- 15. 1 2 4 3 Quick Filter Filter Card Visual Filter Filter Section
- 16. Quick Filter Create a Bar graph using ‘Car Names’, ‘Am’ and ‘Mpg’ and sort the data in descending order. Also, label the graph by clicking ‘T’ icon in the toolbar. Under ‘Dimensions’ section, right click on ‘Am’ and select ‘Show Filter’. On the extreme right Tableau will show a Filter card which allows to select options as per the requirement. A graph has been put up on the next slide and is self explanatory.
- 18. Filter card Duplicate the ‘Quick Filter’ sheet and rename the sheet as ‘Filter Card’. Select the drop down of ‘Am’ filter card and select option ‘Single Value (list)’. This option helps user to select one option at a time. Similarly, other options of the drop down can be explored. In order to remove ‘All’ option from the filter card, click on the drop down of ‘Am’ filter card. Select ‘Customize’ and uncheck the box that says ‘Show “All” Value’. A graph has been put up on the next slide showing the first option of ‘Am’ filter card and is self explanatory.
- 20. Visual Filters Create a Scatter plot using ‘Car Names’, ‘Wt’ and ‘Mpg’. Drag ‘Am’ to color card in ‘Marks’ section Drag and select data points lying in the range 10 to 15 Mpg and 3k to 5k lbs weight then select ‘Keep only’. This will create a filter and will show only the selected data points. Under ‘Am’ filter card, click on ‘Automatic’ and select ‘Keep only’. This will create another filter for the same graph and will show only ‘Automatic’ cars. A graph has been put up on the next slide and is self explanatory.
- 22. Filter Section Create a Bar graph using ‘Car Names’, ‘Vs’ and ‘Mpg’ and sort the data in descending order. Also, label the graph by clicking ‘T’ icon in the toolbar. Drag ‘Vs’ to ‘Filter’ section which is just above ‘Marks’ section and a dialogue box will appear. Uncheck the option ‘Straight’ and check the box ‘Exclude’, then click ‘Ok’. This will show only ‘Straight’ option and exclude all others. A graph has been put up on the next slide and is self explanatory.
- 24. Click next to unlock the answers which have been put up for your reference. In case you need any help, feel free to reach out to me at linkedin.com/kanika-nagpal