r15 - 24 Jan 2007 - 07:34:50 - PeterThoeny? You are here: TWiki >  TWiki Web > SpreadSheetPlugin

This Plugin adds spreadsheet capabilities to TWiki topics. Formulae like %CALC{"\$INT(7/3)"}% are evaluated at page view time. They can be placed in table cells and outside of tables. In other words, this Plugin provides general formula evaluation capability, not just classic spreadsheet functions.

Example:

Region: Sales:
Northeast 320
Northwest 580
South 240
Europe 610
Asia 220
Total: 1970

Interactive example:

Formula: %CALC{""}%
Result:     TWiki Guest

The formula next to "Total" is %CALC{"\$SUM( \$ABOVE() )"}%.
(you see the formula instead of the sum in case the Plugin is not installed or not enabled.)

## Syntax Rules

The action of this Plugin is triggered by the %CALC{"..."}% variable, which gets rendered according to the built-in function(s) found between the quotes.

• Built-in function are of format \$FUNCNAME(parameter)
• Functions may be nested, e.g. %CALC{"\$SUM( R2:C\$COLUMN(0)..R\$ROW(-1):C\$COLUMN(0) )"}%
• Functions are evaluated from left to right, and from inside to outside if nested
• The function parameter can be text; a mathematical formula; a cell address; or a range of cell addresses
• Multiple parameters form a list; they are separated by a comma, followed by optional space, e.g. %CALC{"\$SUM( 3, 5, 7 )"}%
• A table cell can be addressed as R1:C1. Table address matrix:  R1:C1 R1:C2 R1:C3 R1:C4 R2:C1 R2:C2 R2:C3 R2:C4
• A table cell range is defined by two cell addresses separated by "..", e.g. "row 1 through 20, column 3" is: R1:C3..R20:C3
• Lists can refer to values and/or table cell ranges, e.g. %CALC{"\$SUM( 3, 5, \$T(R1:C7), R1:C11..R1:C15 )"}%
• Formulae can only reference cells in the current or preceeding row of the current table; they may not reference cells below the current table row
• Formulae can also be placed outside of tables; they can reference cells in the preceeding table

## Built-in Functions

Conventions for Syntax:

• Required parameters are indicated in ( bold )
• Optional parameters are indicated in ( bold italic )

### ABOVE( ) -- address range of cells above the current cell

• Syntax: \$ABOVE( )
• Example: %CALC{"\$SUM(\$ABOVE())"}% returns the sum of cells above the current cell
• Related: \$LEFT(), \$RIGHT()

### AND( list ) -- logical AND of a list

• Syntax: \$AND( list )
• Example: %CALC{"\$AND(1, 0, 1)"}% returns 0
• Related: \$NOT(), \$IF(), \$OR()

### AVERAGE( list ) -- average of a list or a range of cells

• Syntax: \$AVERAGE( list )
• Example: %CALC{"\$AVERAGE(R2:C5..R\$ROW(-1):C5)"}% returns the average of column 5, excluding the title row
• Related: \$LIST(), \$MAX(), \$MEDIAN(), \$MIN()

### CHAR( number ) -- ASCII character represented by number

• Syntax: \$CHAR( number )
• Example: Example: %CALC{"\$CHAR(97)"}% returns a
• Related: \$CODE()

### CODE( text ) -- ASCII numeric value of character

• The ASCII numeric value of the first character in text
• Syntax: \$CODE( text )
• Example: %CALC{"\$CODE(abc)"}% returns 97
• Related: \$CHAR()

### COLUMN( offset ) -- current column number

• The current table column number with an optional offset
• Syntax: \$COLUMN( offset )
• Example: %CALC{"\$COLUMN()"}% returns 2 for the second column
• Related: \$ROW(), \$T()

### COUNTITEMS( list ) -- count individual items in a list

• Syntax: \$COUNTITEMS( list )
• Example: %CALC{"\$COUNTITEMS(\$ABOVE())"}% returns Closed: 1, Open: 2 assuming one cell above the current cell contains Closed and two cells contain Open
• Related: \$COUNTSTR(), \$LIST()

### COUNTSTR( list, str ) -- count the number of cells in a list equal to a given string

• Count the number of cells in a list equal to a given string (if str is specified), or counts the number of non empty cells in a list
• Syntax: \$COUNTSTR( list, str )
• Example: %CALC{"\$COUNTSTR(\$ABOVE())"}% counts the number of non empty cells above the current cell
• Example: %CALC{"\$COUNTSTR(\$ABOVE(), DONE)"}% counts the number of cells equal to DONE
• Related: \$COUNTITEMS(), \$LIST()

### DEF( list ) -- find first non-empty list item or cell

• Returns the first list item or cell reference that is not empty
• Syntax: \$DEF( list )
• Example: %CALC{"\$DEF(R1:C1..R1:C3)"}%
• Related: \$COUNTSTR(), \$LISTIF(), \$LIST()

### EVAL( formula ) -- evaluate a simple mathematical formula

• Addition, substraction, multiplication, division and modulus of numbers are supported. Any nesting is permitted
• Syntax: \$EVAL( formula )
• Example: %CALC{"\$EVAL( (5 * 3) / 2 + 1.1 )"}% returns 8.6
• Related: \$EXEC(), \$INT(), \$MOD(), \$ROUND(), \$VALUE()

### EXACT( text1, text2 ) -- compare two text strings

• Compares two text strings and returns 1 if they are exactly the same, or 0 if not
• Syntax: \$EXACT( text1, text2 )
• Example: %CALC{"\$EXACT(foo, Foo)"}% returns 0
• Example: %CALC{"\$EXACT(foo, \$LOWER(Foo))"}% returns 1
• Related: \$IF(), \$TRIM()

### EXEC( formula ) -- execute a spreadsheet formula

• Execute a spreadsheet formula, typically retrieved from a variable. This can be used to store a formula in a variable once and execute it many times using different parameters.
• Syntax: \$EXEC( formula )
• Example: %CALC{"\$SET(msg, \$NOEXEC(Hi \$GET(name)))"}% sets the msg variable with raw formula Hi \$GET(name)
• Example: %CALC{"\$SET(name, Tom) \$EXEC(\$GET(msg))"}% executes content of msg variable and returns Hi Tom
• Example: %CALC{"\$SET(name, Jerry) \$EXEC(\$GET(msg))"}% returns Hi Jerry
• Related: \$EVAL(), \$GET(), \$NOEXEC(), \$SET()

### EXISTS( topic ) -- check if topic exists

• Topic can be TopicName or a Web.TopicName
• Syntax: \$EXISTS( topic )
• Example: %CALC{"\$EXISTS(WebHome)"}% returns 1
• Example: %CALC{"\$EXISTS(ThisDoesNotExist)"}% returns 0

### FIND( string, text, start ) -- find one string within another string

• Finds one text string, within another text, and returns the number of the starting position of string, from the first character of text. This search is case sensitive and is not a regular expression search; use \$SEARCH() for regular expression searching. Starting position is 1; a 0 is returned if nothing is matched.
• Syntax: \$FIND( string, text, start )
• Example: %CALC{"\$FIND(f, fluffy)"}% returns 1
• Example: %CALC{"\$FIND(f, fluffy, 2)"}% returns 4
• Example: %CALC{"\$FIND(@, fluffy, 1)"}% returns 0
• Related: \$REPLACE(), \$SEARCH()

### FORMAT( type, prec, number ) -- format a number to a certain type and precision

• Type can be COMMA for comma format, DOLLAR for Dollar format, KB for Kilo Byte format, MB for Mega Byte format, KBMB for Kilo/Mega/Giga/Tera Byte auto-adjust format, NUMBER for number, and PERCENT for percent format
• Syntax: \$FORMAT( type, prec, number )
• Example: %CALC{"\$FORMAT(COMMA, 2, 12345.6789)"}% returns 12,345.68
• Example: %CALC{"\$FORMAT(DOLLAR, 2, 12345.67)"}% returns \$12,345.68
• Example: %CALC{"\$FORMAT(KB, 2, 1234567)"}% returns 1205.63 KB
• Example: %CALC{"\$FORMAT(MB, 2, 1234567)"}% returns 1.18 MB
• Example: %CALC{"\$FORMAT(KBMB, 2, 1234567)"}% returns 1.18 MB
• Example: %CALC{"\$FORMAT(KBMB, 2, 1234567890)"}% returns 1.15 GB
• Example: %CALC{"\$FORMAT(NUMBER, 1, 12345.67)"}% returns 12345.7
• Example: %CALC{"\$FORMAT(PERCENT, 1, 0.1234567)"}% returns 12.3%
• Related: \$ROUND()

### FORMATTIME( serial, text ) -- convert a serialized date into a date string

• The following variables in text are expanded: \$second (seconds, 00..59); \$minute (minutes, 00..59); \$hour (hours, 00..23); \$day (day of month, 01..31); \$month (month, 01..12); \$mon (month in text format, Jan..Dec); \$year (4 digit year, 1999); \$ye (2 digit year, 99), \$wd (day number of the week, 1 for Sunday, 2 for Monday, etc), \$wday (day of the week, Sun..Sat), \$weekday (day of the week, Sunday..Saturday), \$yearday (day of the year, 1..365, or 1..366 in leap years). Date is assumed to be server time; add GMT to indicate Greenwich time zone.
• Syntax: \$FORMATTIME( serial, text )
• Example: %CALC{"\$FORMATTIME(0, \$year/\$month/\$day GMT)"}% returns 1970/01/01 GMT
• Related: \$FORMATGMTIME(), \$TIME(), \$TIMEADD(), \$TIMEDIFF(), \$TODAY()

### FORMATGMTIME( serial, text ) -- convert a serialized date into a GMT date string

• The date string represents the time in Greenwich time zone. Same variable expansion as in \$FORMATTIME().
• Syntax: \$FORMATGMTIME( serial, text )
• Example: %CALC{"\$FORMATGMTIME(1041379200, \$day \$mon \$year)"}% returns 01 Jan 2003
• Related: \$FORMATTIME(), \$TIME(), \$TIMEADD(), \$TIMEDIFF(), \$TODAY()

### GET( name ) -- get the value of a previously set variable

• Specify the variable name (alphanumeric characters and underscores). An empty string is returned if the variable does not exist. Use \$SET() to set a variable first. Unlike table ranges, variables live for the time of the page view and persist across tables, i.e. you can use it to summarize results across several tables.
• Syntax: \$GET( name )
• Example: %CALC{"\$GET(my_total)"}% returns the value of the my_total variable
• Related: \$EXEC(), \$NOEXEC(), \$SET(), \$SETIFEMPTY(), \$SETM()

### IF( condition, value if true, value if 0 ) -- return a value based on a condition

• The condition can be a number (where 0 means condition not met), or two numbers with a comparison operator < (less than), <= (less than or equal), == (equal), != (not equal), >= (greater than or equal), > (greater than).
• Syntax: \$IF( condition, value if true, value if 0 )
• Example: %CALC{"\$IF(\$T(R1:C5) > 1000, Over Budget, OK)"}% returns Over Budget if value in R1:C5 is over 1000, OK if not
• Example: %CALC{"\$IF(\$EXACT(\$T(R1:C2),), empty, \$T(R1:C2))"}% returns the content of R1:C2 or empty if empty
• Example: %CALC{"\$SET(val, \$IF(\$T(R1:C2) == 0, zero, \$T(R1:C2)))"}% sets a variable conditionally
• Related: \$AND(), \$EXACT(), \$LISTIF(), \$NOT(), \$OR()

### INT( formula ) -- evaluate formula and round down to nearest integer

• Addition, substraction, multiplication, division and modulus of numbers are supported. Any nesting is permitted
• Syntax: \$INT( formula )
• Example: %CALC{"\$INT(10 / 4)"}% returns 2
• Related: \$EVAL(), \$ROUND(), \$VALUE()

### LEFT( ) -- address range of cells to the left of the current cell

• Syntax: \$LEFT( )
• Example: %CALC{"\$SUM(\$LEFT())"}% returns the sum of cells to the left of the current cell
• Related: \$ABOVE(), \$RIGHT()

### LENGTH( text ) -- length of text in bytes

• Syntax: \$LENGTH( text )
• Example: %CALC{"\$LENGTH(abcd)"}% returns 4
• Related: \$LISTSIZE()

### LISTIF( condition, list ) -- remove elements from a list that do not meet a condition

• In addition to the condition described in \$IF(), you can use \$item to indicate the current element, and \$index for the list index, starting at 1
• Syntax: \$LISTIF( condition, list )
• Example: %CALC{"\$LISTIF(\$item > 12, 14, 7, 25)"}% returns 14, 25
• Example: %CALC{"\$LISTIF(\$NOT(\$EXACT(\$item,)), A, B, , E)"}% returns non-empty elements A, B, E
• Example: %CALC{"\$LISTIF(\$index > 2, A, B, C, D)"}% returns C, D
• Related: \$IF(), \$LIST(), \$LISTITEM(), \$LISTMAP(), \$LISTREVERSE(), \$LISTSIZE(), \$LISTSORT(), \$LISTUNIQUE(), \$SUM()

### LISTJOIN( separator, list ) -- convert a list into a string

• By default, list items are separated by a comma and a space. Use this function to indicate a specific separator string, which may include \$comma for comma, \$n for newline, and \$sp for space.
• Syntax: \$LISTJOIN( separator, list )
• Example: %CALC{"\$LISTJOIN(\$n, Apple, Orange, Apple, Kiwi)"}% returns the four items separated by new lines
• Related: \$LIST(), \$LISTSIZE()

### MOD( num, divisor ) -- reminder after dividing num by divisor

• Syntax: \$MOD( num, divisor )
• Example: %CALC{"\$MOD(7, 3)"}% returns 1
• Related: \$EVAL()

### NOEXEC( formula ) -- do not execute a spreadsheet formula

• Prevent a formula from getting executed. This is typically used to store a raw formula in a variable for later use as described in \$EXEC().
• Syntax: \$NOEXEC( formula )
• Example: %CALC{"\$SET(msg, \$NOEXEC(Hi \$GET(name)))"}% sets the msg variable with the formula Hi \$GET(name) without executing it
• Related: \$EVAL(), \$EXEC(), \$GET(), \$SET()

### NOP( text ) -- no-operation

• Useful to change the order of Plugin execution. For example, it allows preprossing to be done before %SEARCH{}% is evaluated. The percent character '%' can be escaped with \$per
• Syntax: \$NOP( text )

### NOT( num ) -- reverse logic of a number

• Returns 0 if num is not zero, 1 if zero
• Syntax: \$NOT( num )
• Example: %CALC{"\$NOT(0)"}% returns 1
• Related: \$AND(), \$IF(), \$OR()

### OR( list ) -- logical OR of a list

• Syntax: \$OR( list )
• Example: %CALC{"\$OR(1, 0, 1)"}% returns 1
• Related: \$AND(), \$IF(), \$NOT()

### PERCENTILE( num, list ) -- percentile of a list or range of cells

• Calculates the num-th percentile, useful to establish a threshold of acceptance. num is the percentile value, range 0..100
• Syntax: \$PERCENTILE( num, list )
• Example: %CALC{"\$PERCENTILE(75, 400, 200, 500, 100, 300)"}% returns 450
• Related: \$LIST(), \$MAX(), \$MEDIAN(), \$MIN()

### PRODUCT( list ) -- product of a list or range of cells

• Syntax: \$PRODUCT( list )
• Example: To calculate the product of the cells to the left of the current one use %CALC{"\$PRODUCT(\$LEFT())"}%
• Related: \$LIST(), \$PRODUCT(), \$SUM(), \$SUMPRODUCT()

### PROPER( text ) -- properly capitalize text

• Capitalize letters that follow any character other than a letter; convert all other letters to lowercase letters
• Syntax: \$PROPER( text )
• Example: %CALC{"PROPER(a small STEP)"}% returns A Small Step
• Example: %CALC{"PROPER(f1 (formula-1))"}% returns F1 (Formula-1)
• Related: \$LOWER(), \$PROPERSPACE(), \$TRIM(), \$UPPER()

### PROPERSPACE( text ) -- properly space out WikiWords

• Properly spaces out WikiWords preceeded by white space, parenthesis, or ][. Words listed in the DONTSPACE TWikiPreferences variable or DONTSPACE Plugins setting are excluded
• Syntax: \$PROPERSPACE( text )
• Example: Assuming DONTSPACE contains MacDonald: %CALC{"\$PROPERSPACE(Old MacDonald had a ServerFarm, EeEyeEeEyeOh)"}% returns Old MacDonald had a Server Farm, Ee Eye Ee Eye Oh
• Related: \$LOWER(), \$PROPER(), \$TRIM(), \$UPPER()

### REPEAT( text, num ) -- repeat text a number of times

• Syntax: \$REPEAT( text, num )
• Example: %CALC{"\$REPEAT(/\, 5)"}% returns /\/\/\/\/\

### REPLACE( text, start, num, new ) -- replace part of a text string

• Replace num number of characters of text string text, starting at start, with new text new. Starting position is 1; use a negative start to count from the end of the text
• Syntax: \$REPLACE( text, start, num, new )
• Example: %CALC{"\$REPLACE(abcdefghijk,6,5,*)"}% returns abcde*k
• Related: \$FIND(), \$SEARCH(), \$SUBSTITUTE(), \$TRANSLATE()

### RIGHT( ) -- address range of cells to the right of the current cell

• Syntax: \$RIGHT( )
• Example: %CALC{"\$SUM(\$RIGHT())"}% returns the sum of cells to the right of the current cell
• Related: \$ABOVE(), \$LEFT()

### ROUND( formula, digits ) -- round a number

• Evaluates a simple formula and rounds the result up or down to the number of digits if digits is positive; to the nearest integer if digits is missing; or to the left of the decimal point if digits is negative
• Syntax: \$ROUND( formula, digits )
• Example: %CALC{"\$ROUND(3.15, 1)"}% returns 3.2
• Example: %CALC{"\$ROUND(3.149, 1)"}% returns 3.1
• Example: %CALC{"\$ROUND(-2.475, 2)"}% returns -2.48
• Example: %CALC{"\$ROUND(34.9, -1)"}% returns 30
• Related: \$INT(), \$FORMAT()

### ROW( offset ) -- current row number

• The current table row number with an optional offset
• Syntax: \$ROW( offset )
• Example: To get the number of rows excluding table heading (first row) and summary row (last row you are in), write: %CALC{"\$ROW(-2)"}%
• Related: \$COLUMN(), \$T()

### SEARCH( string, text, start ) -- search a string within a text

• Finds one text string, within another text, and returns the number of the starting position of string, from the first character of text. This search is a RegularExpression search; use \$FIND() for non-regular expression searching. Starting position is 1; a 0 is returned if nothing is matched
• Syntax: \$SEARCH( string, text, start )
• Example: %CALC{"\$SEARCH([uy], fluffy)"}% returns 3
• Example: %CALC{"\$SEARCH([uy], fluffy, 3)"}% returns 6
• Example: %CALC{"\$SEARCH([abc], fluffy,)"}% returns 0
• Related: \$FIND(), \$REPLACE()

### SET( name, value ) -- set a variable for later use

• Specify the variable name (alphanumeric characters and underscores) and the value. The value may contain a formula; formulae are evaluated before the variable assignment; see \$NOEXEC() if you want to prevent that. This function returns no output. Use \$GET() to retrieve variables. Unlike table ranges, variables live for the time of the page view and persist across tables, i.e. you can use it to summarize results across several tables and also across included topics
• Syntax: \$SET( name, value )
• Example: %CALC{"\$SET(my_total, \$SUM(\$ABOVE()))"}% sets the my_total variable to the sum of all table cells located above the current cell and returns an empty string
• Related: \$EXEC(), \$GET(), \$NOEXEC(), \$SETIFEMPTY(), SETM()

### SETIFEMPTY( name, value ) -- set a variable only if empty

• Specify the variable name (alphanumeric characters and underscores) and the value.
• Syntax: \$SETIFEMPTY( name, value )
• Example: %CALC{"\$SETIFEMPTY(result, default)"}% sets the result variable to default if the variable is empty or 0; in any case an empty string is returned
• Related: \$GET(), \$SET()

### SETM( name, formula ) -- update an existing variable based on a formula

• Specify the variable name (alphanumeric characters and underscores) and the formula. The formula must start with an operator to + (add), - (subtract), * (multiply), or / (divide) something to the variable. This function returns no output. Use \$GET() to retrieve variables
• Syntax: \$SETM( name, formula )
• Example: %CALC{"\$SETM(total, + \$SUM(\$LEFT()))"}% adds the sum of all table cells on the left to the total variable, and returns an empty string
• Related: \$GET(), \$SET(), \$SETIFEMPTY()

### SUBSTITUTE( text, old, new, instance, option ) -- substitute text

• Substitutes new text for old text in a text string. instance specifies which occurance of old you want to replace. If you specify instance, only that instance is replaced. Otherwise, every occurance is changed to the new text. A literal search is performed by default; a RegularExpression search if the option is set to r
• Syntax: \$SUBSTITUTE( text, old, new, instance, option )
• Example: %CALC{"\$SUBSTITUTE(Good morning, morning, day)"}% returns Good day
• Example: %CALC{"\$SUBSTITUTE(Q2-2002,2,3)"}% returns Q3-3003
• Example: %CALC{"\$SUBSTITUTE(Q2-2002,2,3,3)"}% returns Q2-2003
• Example: %CALC{"\$SUBSTITUTE(abc123def,[0-9],9,,r)"}% returns abc999def
• Related: \$REPLACE(), \$TRANSLATE()

### SUM( list ) -- sum of a list or range of cells

• Syntax: \$SUM( list )
• Example: To sum up column 5 excluding the title row, write %CALC{"\$SUM(R2:C5..R\$ROW(-1):C5)"}% in the last row; or simply %CALC{"\$SUM(\$ABOVE())"}%
• Related: \$LIST(), \$PRODUCT(), \$SUMPRODUCT(), \$WORKINGDAYS()

### SUMDAYS( list ) -- sum the days in a list or range of cells

• The total number of days in a list or range of cells containing numbers of hours, days or weeks. The default unit is days; units are indicated by a h, hours, d, days, w, weeks suffix. One week is assumed to have 5 working days, one day 8 hours
• Syntax: \$SUMDAYS( list )
• Example: %CALC{"\$SUMDAYS(2w, 1, 2d, 4h)"}% returns 13.5, the evaluation of (2*5 + 1 + 2 + 4/8)
• Related: \$SUM(), \$TIME(), \$FORMATTIME()

### SUMPRODUCT( list, list ) -- scalar product on ranges of cells

• Syntax: \$SUMPRODUCT( list, list, list... )
• Example: %CALC{"\$SUMPRODUCT(R2:C1..R4:C1, R2:C5..R4:C5)"}% evaluates and returns the result of (\$T(R2:C1) * \$T(R2:C5) + \$T(R3:C1) * \$T(R3:C5) + \$T(R4:C1) * \$T(R4:C5))
• Related: \$LIST(), \$PRODUCT(), \$SUM()

### T( address ) -- content of a cell

• Example: %CALC{"\$T(R1:C5)"}% returns the text in cell R1:C5
• Related: \$COLUMN(), \$ROW()

### TRANSLATE( text, from, to ) -- translate text from one set of characters to another

• The translation is done from a set to a set, one character by one. The text may contain commas; all three parameters are required. In the from and to parameters you can write \$comma to escape comma, \$sp to escape space
• Syntax: \$TRANSLATE( text, from, to )
• Example: %CALC{"\$TRANSLATE(boom,bm,cl)"}% returns cool
• Example: %CALC{"\$TRANSLATE(one, two,\$comma,;)"}% returns one; two
• Related: \$REPLACE(), \$SUBSTITUTE()

### TIME( text ) -- convert a date string into a serialized date number

• Serialized date is seconds since the Epoch, e.g. midnight, 01 Jan 1970. Current time is taken if the date string is empty. Supported date formats: 31 Dec 2009; 31 Dec 2009 GMT; 31 Dec 09; 31-Dec-2009; 31/Dec/2009; 2009/12/31; 2009-12-31; 2009/12/31; 2009/12/31 23:59; 2009/12/31 - 23:59; 2009-12-31-23-59; 2009/12/31 - 23:59:59; 2009.12.31.23.59.59. Date is assumed to be server time; add GMT to indicate Greenwich time zone
• Syntax: \$TIME( text )
• Example: %CALC{"\$TIME(2003/10/14 GMT)"}% returns 1066089600
• Related: \$FORMATTIME(), \$FORMATGMTIME(), \$TIMEADD(), \$TIMEDIFF(), \$TODAY(), \$WORKINGDAYS()

### TIMEADD( serial, value, unit ) -- add a value to a serialized date

• The unit is seconds if not specified; unit can be second, minute, hour, day, week, month, year. Note: An approximation is used for month and year calculations
• Syntax: \$TIMEADD( serial, value, unit )
• Example: %CALC{"\$TIMEADD(\$TIME(), 2, week)"}% returns the serialized date two weeks from now
• Related: \$FORMATTIME(), \$FORMATGMTIME(), \$TIME(), \$TIMEDIFF(), \$TODAY()

### TIMEDIFF( serial_1, serial_2, unit ) -- time difference between two serialized dates

• The unit is seconds if not specified; unit can be specified as in \$TIMEADD(). Note: An approximation is used for month and year calculations. Use \$FORMAT() or \$INT() to format real numbers
• Syntax: \$TIMEDIFF( serial_1, serial_2, unit )
• Example: %CALC{"\$TIMEDIFF(\$TIME(), \$EVAL(\$TIME()+90), minute)"}% returns 1.5
• Related: \$FORMAT(), \$FORMATTIME(), \$FORMATGMTIME(), \$INT(), \$TIME(), \$TIMEADD(), \$TODAY(), \$WORKINGDAYS()

### TODAY( ) -- serialized date of today at midnight GMT

• In contrast, the related \$TIME() returns the serialized date of today at the current time, e.g. it includes the number of seconds since midnight GMT
• Syntax: \$TODAY( )
• Example: %CALC{"\$TODAY()"}% returns the number of seconds since Epoch
• Related: \$FORMATTIME(), \$FORMATGMTIME(), \$TIME(), \$TIMEADD(), \$TIMEDIFF()

### TRIM( text ) -- trim spaces from text

• Removes all spaces from text except for single spaces between words
• Syntax: \$TRIM( text )
• Example: %CALC{"\$TRIM( eat  spaces  )"}% returns eat spaces
• Related: \$EXACT(), \$PROPERSPACE()

### VALUE( text ) -- convert text to number

• Syntax: \$VALUE( text )
• Example: %CALC{"\$VALUE(US\$1,200)"}% returns 1200
• Example: %CALC{"\$VALUE(PrjNotebook1234)"}% returns 1234
• Example: %CALC{"\$VALUE(Total: -12.5)"}% returns -12.5
• Related: \$EVAL(), \$INT()

### WORKINGDAYS( serial_1, serial_2 ) -- working days between two serialized dates

• Working days are Monday through Friday (sorry, Israel!)
• Syntax: \$WORKINGDAYS( serial_1, serial_2 )
• Example: %CALC{"\$WORKINGDAYS(\$TIME(2004/07/15), \$TIME(2004/08/03))"}% returns 13
• Related: \$SUMDAYS(), \$TIME(), \$TIMEDIFF()

## FAQ

### Can I use CALC in a formatted search?

Specifically, how can I output some conditional text in a FormattedSearch?

You need to escape the CALC so that it executes once per search hit. This can be done by escaping the % signs of %CALC{...}% with \$percnt. For example, to execute \$IF(\$EXACT(\$formfield(Tested), Yes), %PUBURL%/%TWIKIWEB%/TWikiDocGraphics/choice-yes.gif, %PUBURL%/%TWIKIWEB%/TWikiDocGraphics/choice-no.gif) in the format="" parameter, write this:

%SEARCH{ .... format="| \$topic | \$percntCALC{\$IF(\$EXACT(\$formfield(Tested), Yes), %PUBURL%/%TWIKIWEB%/TWikiDocGraphics/choice-yes.gif, %PUBURL%/%TWIKIWEB%/TWikiDocGraphics/choice-no.gif)}\$percnt |" }%

### How can I easily repeat a formula in a table?

To repeat the same formula in all cells of a table row define the formula once in a preferences setting and use that in the CALC. The preferences setting can be hidden in HTML comments. Example:

<!--
* Set MYFORMULA = \$EVAL(\$SUBSTITUTE(...etc...))
-->
| A | 1 | %CALC{%MYFORMULA%}% |
| B | 2 | %CALC{%MYFORMULA%}% |
| C | 3 | %CALC{%MYFORMULA%}% |

## Bug Tracking Example

Bug#: Priority: Subject: Status: Days to fix
Bug:1231 Low File Open ... Open 3
Bug:1232 High Memory Window ... Fixed 2
Bug:1233 Medium Usability issue ... Assigned 5
Bug:1234 High No arrange ... Fixed 1
Total: 4 High: 2
Low: 1
Medium: 1
. Assigned: 1
Fixed: 2
Open: 1
Total: 11

The last row is defined as:

| Total: %CALC{"\$ROW(-2)"}% \
| %CALC{"\$COUNTITEMS( R2:C\$COLUMN()..R\$ROW(-1):C\$COLUMN() )"}% | . \
| %CALC{"\$COUNTITEMS( R2:C\$COLUMN()..R\$ROW(-1):C\$COLUMN() )"}% \
|  Total: %CALC{"\$SUM( R2:C\$COLUMN()..R\$ROW(-1):C\$COLUMN() )"}% |

Above table is created manually. Another Plugin could build the table dynamically, e.g. by pulling data out of a bug tracking system. The Spreadsheet Plugin can be used to display table data statistics.

## Plugin Settings

Plugin settings are stored as preferences variables. To reference a plugin setting write %<plugin>_<setting>%, i.e. %SPREADSHEETPLUGIN_SHORTDESCRIPTION%

• One line description, is shown in the TextFormattingRules topic:
• Set SHORTDESCRIPTION = Add spreadsheet calculation like "\$SUM( \$ABOVE() )" to TWiki tables and other topic text

• Debug plugin: (See output in data/debug.txt)
• Set DEBUG = 0

• Do not handle %CALC{}% variable in included topic while including topic: (default: 1)
• Set SKIPINCLUDE = 1

• WikiWords to exclude from being spaced out by the \$PROPERSPACE(text) function. This comma delimited list can be overloaded by a DONTSPACE preferences variable:
• Set DONTSPACE = CodeWarrior, MacDonald, McIntosh, RedHat, SuSE

## Plugin Installation Instructions

Note: You do not need to install anything on the browser to use this plugin. Below installation instructions are for the administrator who needs to install this plugin on the TWiki server.

File: Description:
• TWiki 4 and up: Visit configure in your TWiki installation, and enable the Plugin in the {Plugins} section.
• Test if the "Total" in the first table in this topic is correct.