Smalltalk/X Webserver

Documentation of class 'TableData':

Class: TableData

Inheritance
Description
Class protocol
- instance creation
Instance protocol
Examples

Inheritance:

   Object
   |
   +--TableData

Package:: stx:libbasic2

Category:: Collections-Sequenceable-Table

Version:: rev: 1.11 date: 2022/06/30 13:46:07; user: stefan; file: TableData.st directory: libbasic2; module: stx stc-classLibrary: libbasic2

Description:

Unfinished
 Ongoing work to support some algorithms on table data (such as CSV files).
 
 Snippets to read and process tabular (CSV) data
 Snippets to generate a plot.

 The category DWD (Deutscher Wetter Dienst / German weather service)
 contains specific code to deal with historic weather data.

 plot requires the r language to be installed (uses 'r' command).


 [instance variables:]
     rowData                 the actual data
     columnNames             name per column 
     columnTypes             type per column (default is String)
     tableName               name - only used for labeling graphs
     
 [class variables:]

copyrightCOPYRIGHT (c) 2018 by eXept Software AG
             All Rights Reserved

This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice.   This software may not
be provided or otherwise made available to, or used by, any
other person.  No title to or ownership of the software is
hereby transferred.

Class protocol:

instance creation

fromFile: filename: self fromFile:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt'
rows: rowData columnNames: names
rows: rowData columnNames: names tableName: tableName

Instance protocol:

accessing

getColumn: index

return a column (by index) as a vector

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        getColumn:1.

getColumnNamed: name

return a column (by name) as a vector

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        getColumnNamed:'TXK'.

getColumns: indexCollection

return multiple columns (by index vector) as a vector of columns

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        getColumns:#(1 2 3).

getColumnsNamed: names

return multiple columns (by name vector) as a vector of columns

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        getColumnsNamed:#('MESS_DATUM' 'TXK' 'TNK').

tableName: aString

set the table's name

tableNamePrefix: aString

prepend a prefix to the table's name

tableNameSuffix: aString

append a suffix to the table's name

analysis

addBincoSlidingMean3ForColumnNamed: colName

add a column with the sliding binco mean (1/4 + 1/2 + 1/4).
As binco:3 is quite common,
that is a tuned version of addBincoSlidingMean:3 forColumnNamed:colName

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerYearOfColumnNamed:'TXK')
                addBincoSlidingMean3ForColumnNamed:'Mean_Per_Year_TXK')
                    tableName:'Feldberg/Schwarzwald';
                    plot:{ #x -> 'MESS_DATUM' . #y -> { 'Mean_Per_Year_TXK' . 'Sliding_Binco_Mean_of_Mean_Per_Year_TXK' .  }}.

addBincoSlidingMean: n forColumnNamed: colName

add a column with the sliding binco mean (1/2^n + ... + 1/4 + 1/2 + 1/4 + ... + 1/2^n)

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerYearOfColumnNamed:'TXK')
                addBincoSlidingMean:5 forColumnNamed:'Mean_Per_Year_TXK')
                    tableName:'Feldberg/Schwarzwald';
                    plot:{ #x -> 'MESS_DATUM' . 
                           #y -> { 'Mean_Per_Year_TXK' . 'Sliding_Binco_Mean_of_Mean_Per_Year_TXK' .  }}.

addSlidingMean: n forColumnNamed: colName

add a column with the sliding mean.
The sliding mean looks meaner, but may introduce lag (phase shift),
which binco avoids.

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerYearOfColumnNamed:'TXK')
                addSlidingMean:11 forColumnNamed:'Mean_Per_Year_TXK')
                    tableName:'Feldberg/Schwarzwald';
                    plot:{ #x -> 'MESS_DATUM' . #y -> { 'Mean_Per_Year_TXK' . 'Sliding_Mean_of_Mean_Per_Year_TXK' .  }}.

extractRowsWhere: filterBlock

return a new table containing only rows for which filterBlock evaluates to true

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractRowsWhere:[:row | (row at:1) startsWith:'1945'])
                    plot
        
     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractRowsWhere:[:row | ((row at:1) from:5 to:6) = '01'])
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractMonth:8)
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractMonth:9)
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractMonth:10)
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt')
            meanPerMonthOfColumnNamed:'TXK')
                extractMonth:10)
                    tableNameSuffix:'-Echterdingen';
                    plot

analysis - DWD

dwd_extractMonth: monthIndex

return a new table containing only rows for that month.
This is specific to DWD data

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:1 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot
        
     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:2 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:8 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:9 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    tableNameSuffix:'-Echterdingen';
                    plot

dwd_extractMonth: monthIndex columnName: monthColumnName

return a new table containing only rows for that month.
This is specific to DWD data

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:1 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot
        
     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:2 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:8 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:9 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    tableNameSuffix:'-Echterdingen';
                    plot

dwd_extractMonth: monthIndex columnName: monthColumnName format: dateFormat

return a new table containing only rows for that month.
This is specific to DWD data

Usage example(s):

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:1 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot
        
     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:2 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:8 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:9 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:10 columnName:'MESS_DATUM' format:'%4y%2m')
                    tableNameSuffix:'-Echterdingen';
                    plot

     (((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                dwd_extractMonth:3 columnName:'MESS_DATUM' format:'%4y%2m')
                    tableNameSuffix:'-Echterdingen';
                    plot

     |table|
     table := (self new 
            readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19530101_20171231_04931.txt').
     1 to:12 do:[:month |        
         ((table
                dwd_meanPerMonthOfColumnNamed:'TXK')
                    dwd_extractMonth:month columnName:'MESS_DATUM' format:'%4y%2m')
                        tableNameSuffix:'-Echterdingen';
                        plot
     ]

dwd_extractMonth: month day: day

return a new table containing only rows for that day in month

Usage example(s):

     ((self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
        dwd_extractMonth:1 day:1)
            tableName:'1st Januar, Feldberg';
            plot:{ #x -> 'MESS_DATUM' . #y -> { 'TXK' . 'TNK' }}

dwd_extractMonth: month day: day columnName: monthColumnName format: dateFormat

return a new table containing only rows for that day in month

Usage example(s):

     ((self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
        dwd_extractMonth:1 day:1 columnName:'MESS_DATUM' format:'%4y%2m%2d')
            plot:{ #x -> 'MESS_DATUM' . #y -> { 'TXK' . 'TNK' }}

dwd_meanPerMonthOfColumnNamed: colName

return a new table containing the arithmetic mean per month of a column

Usage example(s):

     ((self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerMonthOfColumnNamed:'TXK')
                plot

dwd_meanPerYearOfColumnNamed: colName

return a new table containing the arithmetic mean per year of a column

Usage example(s):

     ((self new 
        read:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
            dwd_meanPerYearOfColumnNamed:'TXK')
                plot

analysis - masie

masie_meanPerMonthOfColumnNamed: colName

return a new table containing the arithmetic mean per month of a column
of masie data

Usage example(s):

     ((self new 
        readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv' separator:$, skip:1)
            masie_meanPerMonthOfColumnNamed:'(0) Northern_Hemisphere')
                plot

helpers

indexOfColumnNamed: name

find a column index by name

Usage example(s):

     self new 
        read:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        indexOfColumnNamed:'MESS_DATUM'.

indexOfColumnNamed: name ifAbsent: exceptionValue

find a column index by name

Usage example(s):

     self new 
        read:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        indexOfColumnNamed:'MESS_DATUM'.

instance creation

rows: rowDataArg columnNames: columnNamesArg
rows: rowDataArg columnNames: columnNamesArg tableName: tableNameArg

plotting

plot

|data tmax|

data := self fromFile:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt'.
tmax := data withColumnsNamed:#('MESS_DATUM' 'TXK' 'TNK').
tmax plot:{ #x -> 'MESS_DATUM' . #y -> { 'TXK' 'TNK' }} .

plot: optionalSpec

FileBrowserV2 openOn:tmpFile.

plot: optionalSpec file: fileName

'plot(',xCol,', '

Usage example(s):

     |data tmax|
     
     data := self fromFile:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt'.
     tmax := data withColumnsNamed:#('MESS_DATUM' 'TXK').
     tmax tableName:'Feldberg'.
     tmax plot:{ #x -> 'MESS_DATUM' . #y -> { 'TXK' . 'TNK' }}.

Usage example(s):

     |data tmax|

     data := self fromFile:'/Users/exept/Desktop/klima/monatswerte_KL_01050_19240101_20181231_hist/produkt_klima_monat_19240101_20181231_01050.txt'.
     tmax := data withColumnsNamed:#('MESS_DATUM_BEGINN' 'MO_TT').
     tmax tableName:'Feldberg'.
     tmax plot:{ #x -> 'MESS_DATUM_BEGINN' . #y -> { 'MO_TT'  }}.

plotFile: fileName

processing

removeColumn: index

destructively remove a column

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        removeColumn:1;
        inspect.

removeColumnNamed: name

destructively remove a column

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        removeColumnNamed:'STATIONS_ID';
        removeColumnNamed:'QN_3';
        removeColumnNamed:'FX';
        removeColumnNamed:'FM';
        removeColumnNamed:'RSK';
        removeColumnNamed:'RSKF';
        removeColumnNamed:'SDK';
        removeColumnNamed:'SHK_TAG';
        removeColumnNamed:'NM';
        removeColumnNamed:'VPM';
        removeColumnNamed:'PM';
        removeColumnNamed:'TMK';
        removeColumnNamed:'UPM';
        removeColumnNamed:'eor';
        inspect.

withColumns: indexCollection

return a new TableData instance, containing only the given columns

Usage example(s):

     (self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
        withColumns:#(1 2 3).

withColumnsNamed: nameCollection

return a new TableData instance, containing only the given columns

Usage example(s):

     (self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
        withColumnsNamed:#('MESS_DATUM' 'TXK').

withoutColumn: index

return a new TableData instance, without the given columns

Usage example(s):

     self new 
        readCSV:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
        withoutColumn:1.

withoutColumns: indexCollection

return a new TableData instance, without the given columns

Usage example(s):

     (self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt')
        withoutColumns:#(1 2 3).

reading

readCSV: filename

self new
readCSV:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
inspect.

Usage example(s):

     self new 
        readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv';
        inspect.

readCSV: filename separator: separatorCharacter

self new
readCSV:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
inspect.

readCSV: filename separator: separatorCharacter skip: numLinesToSkip

self new
readCSV:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
inspect.

readCSV: filename skip: numLinesToSkip

self new
readCSV:'/Users/cg/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt';
inspect.

Usage example(s):

     self new 
        readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv' skip:1;
        inspect.

readDemoCSV

writing

writeCSVToStream: aStream

save myself as CSV onto a stream

Usage example(s):

     |data tmax|
     
     data := self fromFile:'~/Documents/klima/data/DWD/daily/kl/historical/produkt_klima_tag_19450101_20171231_01346.txt'.
     tmax := data withColumnsNamed:#('MESS_DATUM' 'TXK' 'TNK').
     String streamContents:[:s | tmax writeCSVToStream:s]

Examples:

   self new 
      readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv';
      inspect.

   ((self new 
      readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv' separator:$, skip:1)
          masie_meanPerMonthOfColumnNamed:'(0) Northern_Hemisphere')
              plot

   '/tmp/xxx.csv' asFilename writingFileDo:[:s |
      ((self new 
          readCSV:'/Users/exept/Downloads/masie_4km_allyears_extent_sqkm.csv' separator:$, skip:1)
              masie_meanPerMonthOfColumnNamed:'(0) Northern_Hemisphere')
                  writeCSVToStream:s
    ]  

   |data tmax|
   data := self fromFile:'/Users/exept/Desktop/klima/monatswerte_KL_04927_17920101_19840731_hist/produkt_klima_monat_17920101_19840731_04927.txt'.
   tmax := data withColumnsNamed:#('MESS_DATUM_BEGINN' 'MO_TT').
   tmax tableName:'Stuttgart 04927'.
   tmax plot:{ #x -> 'MESS_DATUM_BEGINN' . #y -> { 'MO_TT'  }}.

   |data|
   data := self fromFile:'/Users/exept/Desktop/klima/monatswerte_KL_04927_17920101_19840731_hist/produkt_klima_monat_17920101_19840731_04927.txt'.
   data := data withColumnsNamed:#('MESS_DATUM_BEGINN' 'MO_TT').
   data := data dwd_meanPerYearOfColumnNamed:'MO_TT'.
   data tableName:'Stuttgart 04927'.
   data plot:{ #x -> 'MESS_DATUM' . #y -> { 'Mean_Per_Year_MO_TT'  }}.

   |data|
   data := self fromFile:'/Users/exept/Desktop/klima/monatswerte_KL_05792_19000801_20181231_hist/produkt_klima_monat_19000801_20181231_05792.csv'.
   data := data withColumnsNamed:#('MESS_DATUM_BEGINN' 'MO_TT').
   data := data dwd_meanPerYearOfColumnNamed:'MO_TT'.
   data tableName:'Zugspitze 04927'.
   data plot:{ #x -> 'MESS_DATUM' . #y -> { 'Mean_Per_Year_MO_TT'  }}.

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