Difference between revisions of "MIT The World of spreadsheets and simple graphing"

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(Tidy data)
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== Tidy Data ==
 
== Tidy Data ==
''by Hadley Wickham''
+
[https://drive.google.com/file/d/0BzQL08YDc6cUMmdLcXdienZudFE ''Tidy Data by Hadley Wickham'']
 
# Each variable forms a column,
 
# Each variable forms a column,
 
# Each observation forms a row,
 
# Each observation forms a row,

Revision as of 10:55, 12 October 2015

Spreadsheets

give a simple explanation


The Good, The Bad, and the Ugly

The Good

  • Spreadsheet's is a low entry point for an application framework, in the same way that WordPress is a website framework
    • You don't have to be a developer/programmer

The Bad

  • Spreadsheets are used to make applications
    • You don't have to be a developer/programmer
    • Complex spreadsheets suffer from errors; become difficult to troubleshoot

The Ugly


The World of Spreadsheets

  • Gnumeric most powerful spreadsheet program
    • Single editor environment
    • Size Limit: Max rows: 16,777,216; Max Columns: 16,384; Max Cells: 274,877,906,944
    • Project doesn't provide Windows binaries; lag for latest version to be ported to Windows or Macintosh
  • Libre Calc
    • Single editor environment
    • Size Limit: each sheet can have a maximum of 1,048,576 rows and a maximum of 1024 columns.
      • Each document has a size limit of 4 GB
  • Google Sheets
  • Microsoft Excel
    • Single editor environment
    • x32 bit vs. x64 bit
    • Size Limit: 1,048,576 rows by 16,384 columns
      • x32 bit: Each document limited to 2GB
      • x64 bit: Each document limited by system physical memory
  • Microsoft Excel Online in Office 365
    • Multi-editor environment --Maximum of 5 concurrent editors
    • Size Limit: 250 MB

Tidy Data

Tidy Data by Hadley Wickham

  1. Each variable forms a column,
  2. Each observation forms a row,
  3. Each table (or file) stores data about one class of experimental unit.