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vd [2021/06/11 12:18]
dblume [VisiData]
vd [2021/08/09 22:58] (current)
dblume [Case Study: Exported CSV from PG&E]
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 **[[https://www.visidata.org/|VisiData]]** is an interactive CLI table explorer with vim key bindings. Here is [[https://jsvine.github.io/intro-to-visidata/index.html|a really great tutorial]]. These are notes to myself. **[[https://www.visidata.org/|VisiData]]** is an interactive CLI table explorer with vim key bindings. Here is [[https://jsvine.github.io/intro-to-visidata/index.html|a really great tutorial]]. These are notes to myself.
  
-====== Tips ====== +====== Source Table Recommendations ======
- +
-===== Source Table Recommendations =====+
  
 Gather data with more granularity than you think you need. You often need three tables: Gather data with more granularity than you think you need. You often need three tables:
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   - **Mappings from product ID to product name**: (Maybe from platform ID or from product ID.)   - **Mappings from product ID to product name**: (Maybe from platform ID or from product ID.)
  
-===== Open VisiData and Set Data Types =====+====== Open VisiData and Set Data Types ======
  
   $ vd logs.csv active_devices.csv id_name.csv   $ vd logs.csv active_devices.csv id_name.csv
  
-==== Set Column Types, Widths, Names, Importance ====+===== Set Column Types, Widths, Names, Importance =====
  
 ^ Key ^ Meaning ^ ^ Key ^ Meaning ^
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 | # | Column is integer. (Set aggregator to sum.) | | # | Column is integer. (Set aggregator to sum.) |
 | + | Set aggregator, usually to "sum" | | + | Set aggregator, usually to "sum" |
-| ; | Extract regex to new column. Ex, ''(video|audio)'', ''(^..)'' or ''(^([STUVW]...|..))'' |+| ; | Extract regex to new column. Ex, ''(video|audio)'', ''(^..)'' or ''(^([STUVW]%%...%%|..))'' |
 | %%^%% | rename the column. Might have to be "product_id" or "platform_id" | | %%^%% | rename the column. Might have to be "product_id" or "platform_id" |
 | - | Hide column | | - | Hide column |
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 | " | Open duplicate sheet with only selected rows | | " | Open duplicate sheet with only selected rows |
  
-=== Protip: Use column view to set multiple columns at once ===+==== Case Study: Exported CSV from PG&E ==== 
 + 
 +Visit [[vd-pge]]. 
 + 
 +==== Protip: Use column view to set multiple columns at once ====
  
 ^ Key ^ Meaning ^ ^ Key ^ Meaning ^
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 {{:general:active_devices.png?direct|}} {{:general:active_devices.png?direct|}}
  
-===== Join Sheets =====+====== Join Sheets ======
  
 Use ''!'' to set Key columns. Use ''F'' (or ''gF'') to remove dupes of Keys by making a Frequency Table. Use ''!'' to set Key columns. Use ''F'' (or ''gF'') to remove dupes of Keys by making a Frequency Table.
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 | & | (or g&) Join sheets. Type "inner" for an inner join. | | & | (or g&) Join sheets. Type "inner" for an inner join. |
 | gu | Next time you're in Sheets, "global unselect" to unselect the sheets you selected. | | gu | Next time you're in Sheets, "global unselect" to unselect the sheets you selected. |
 +
 +==== Protip: Remove insignificant noisy rows ====
 +
 +^ Key ^ Meaning ^
 +| %%z|%% | Select rows matching Python expression. Type "blits > 10000" |
 +| " | Make a new sheet with selected rows |
  
 And the merge of the logs and active devices sheets would look like: And the merge of the logs and active devices sheets would look like:
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 Do a similar thing to join the Joined Sheet with the product Name sheet. Do a similar thing to join the Joined Sheet with the product Name sheet.
  
-===== Process Data =====+====== Process Data ======
  
 In your final Joined sheet, add rows that are calculations of other rows. In your final Joined sheet, add rows that are calculations of other rows.
vd.1623439117.txt.gz · Last modified: 2021/06/11 12:18 by dblume