Difference between revisions of "Documentation/How Tos/Calc: DSTDEVP function"
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− | :The | + | :The [[Documentation/How_Tos/Calc: Database functions|Database functions overview]] describes these parameters in detail. |
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{| border="1" | {| border="1" | ||
|-align="center" | |-align="center" | ||
− | | ||A'''||B'''||C'''||D'''||E''' | + | | ||'''A'''||'''B'''||'''C'''||'''D'''||'''E''' |
|-align="center" | |-align="center" | ||
− | |1'''||Name||Grade||Age||Distance to School||Weight | + | |'''1'''||Name||Grade||Age||Distance to School||Weight |
|-align="center" | |-align="center" | ||
− | |2'''||Andy||3||9||150||40 | + | |'''2'''||Andy||3||9||150||40 |
|-align="center" | |-align="center" | ||
− | |3'''||Betty||4||10||1000||42 | + | |'''3'''||Betty||4||10||1000||42 |
|-align="center" | |-align="center" | ||
− | |4'''||Charles||3||10||300||51 | + | |'''4'''||Charles||3||10||300||51 |
|-align="center" | |-align="center" | ||
− | |5'''||Daniel||5||11||1200||48 | + | |'''5'''||Daniel||5||11||1200||48 |
|-align="center" | |-align="center" | ||
− | |6'''||Eva||2||8||650||33 | + | |'''6'''||Eva||2||8||650||33 |
|-align="center" | |-align="center" | ||
− | |7'''||Frank||2||7||300||42 | + | |'''7'''||Frank||2||7||300||42 |
|-align="center" | |-align="center" | ||
− | |8'''||Greta||1||7||200||36 | + | |'''8'''||Greta||1||7||200||36 |
|-align="center" | |-align="center" | ||
− | |9'''||Harry||3||9||1200||44 | + | |'''9'''||Harry||3||9||1200||44 |
|-align="center" | |-align="center" | ||
− | |10'''||Irene||2||8||1000||42 | + | |'''10'''||Irene||2||8||1000||42 |
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− | |11'''|| || || || || | + | |'''11'''|| || || || || |
|-align="center" | |-align="center" | ||
− | |12'''|| || || || || | + | |'''12'''|| || || || || |
|-align="center" | |-align="center" | ||
− | |13'''||Name||Grade||Age||Distance to School||Weight | + | |'''13'''||Name||Grade||Age||Distance to School||Weight |
|-align="center" | |-align="center" | ||
− | |14'''|| ||2|| || || | + | |'''14'''|| ||2|| || || |
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: returns the standard deviation of the weights of children in the second grade, assuming that these are the only children in the second grade. This is not a useful measure, as there are so few children. | : returns the standard deviation of the weights of children in the second grade, assuming that these are the only children in the second grade. This is not a useful measure, as there are so few children. | ||
+ | ===Issues:=== | ||
+ | * The OOo2.3 Help implies that <tt>'''0'''</tt> as a <tt>'''field'''</tt> will include the entire database table. This seems to be wrong - only the standard deviation of a single column can be found. | ||
− | {{ | + | * Logical values TRUE and FALSE are interpreted as 1 and 0 in the calculation. This is not compatible with Excel, which ignores logical values. This will very rarely cause difficulty. |
+ | |||
+ | |||
+ | {{SeeAlso|EN| | ||
* [[Documentation/How_Tos/Calc: DCOUNT function|DCOUNT]] | * [[Documentation/How_Tos/Calc: DCOUNT function|DCOUNT]] | ||
* [[Documentation/How_Tos/Calc: DCOUNTA function|DCOUNTA]] | * [[Documentation/How_Tos/Calc: DCOUNTA function|DCOUNTA]] | ||
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* [[Documentation/How_Tos/Calc: DVAR function|DVAR]] | * [[Documentation/How_Tos/Calc: DVAR function|DVAR]] | ||
* [[Documentation/How_Tos/Calc: DVARP function|DVARP]] | * [[Documentation/How_Tos/Calc: DVARP function|DVARP]] | ||
− | * [[Documentation/How_Tos/Calc: DGET function|DGET]] | + | * [[Documentation/How_Tos/Calc: DGET function|DGET]] |
− | + | * [[Documentation/How_Tos/Calc: STDEVP function|STDEVP]] | |
− | * [[Documentation/How_Tos/Calc: STDEVP function|STDEVP]] | + | * [[Documentation/How_Tos/Calc: Database functions#Overview|Database functions overview]] |
− | + | * [[Documentation/How_Tos/Calc: Database functions|Database functions]] | |
− | * [[Documentation/How_Tos/Calc: Database functions#Overview|Database functions overview]] | + | |
− | + | ||
− | * [[Documentation/How_Tos/Calc: Database functions|Database functions]] | + | |
− | + | ||
* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] | * [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] | ||
* [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} | * [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} | ||
− | + | [[Category: Documentation/Reference/Calc/Database functions]] | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + |
Latest revision as of 12:45, 16 July 2018
DSTDEVP
Returns the standard deviation of values in a column of a Calc 'database' table, in rows which meet specified criteria.
Syntax:
DSTDEVP(database_table; field; criteria_table)
where
- database_table is a range defining the data to be examined.
- field is the column to examine. It may be a column number (1 is the first column of the database table, 2 is the second ...) or a column header (enclosed in quotation marks ””) or a cell referring to a column header.
- criteria_table is a range containing criteria, which are used to select which rows of the database_table to examine.
- The Database functions overview describes these parameters in detail.
DSTDEVP returns the standard deviation of a population, which assumes that the chosen rows of the database_table are an entire normally distributed population. If the chosen data are a sample of the population, use * DESVEST instead. The DESVESTP calculation uses this formula:
where N is the number of values included and xi are those values.
DSTDEVP ignores any cell containing text in the field column.
Simply put, standard deviation is a measure of how widely spread data values are. It is the square root of the variance (see * DVAR, * DVARP). Standard deviation is a reliable measure only if there is enough data to examine.
Example:
In this spreadsheet:
A | B | C | D | E | |
1 | Name | Grade | Age | Distance to School | Weight |
2 | Andy | 3 | 9 | 150 | 40 |
3 | Betty | 4 | 10 | 1000 | 42 |
4 | Charles | 3 | 10 | 300 | 51 |
5 | Daniel | 5 | 11 | 1200 | 48 |
6 | Eva | 2 | 8 | 650 | 33 |
7 | Frank | 2 | 7 | 300 | 42 |
8 | Greta | 1 | 7 | 200 | 36 |
9 | Harry | 3 | 9 | 1200 | 44 |
10 | Irene | 2 | 8 | 1000 | 42 |
11 | |||||
12 | |||||
13 | Name | Grade | Age | Distance to School | Weight |
14 | 2 |
DSTDEVP(A1:E10; "Weight"; A13:E14)
- returns the standard deviation of the weights of children in the second grade, assuming that these are the only children in the second grade. This is not a useful measure, as there are so few children.
Issues:
- The OOo2.3 Help implies that 0 as a field will include the entire database table. This seems to be wrong - only the standard deviation of a single column can be found.
- Logical values TRUE and FALSE are interpreted as 1 and 0 in the calculation. This is not compatible with Excel, which ignores logical values. This will very rarely cause difficulty.
See Also