Difference between revisions of "Documentation/How Tos/Calc: INTERCEPT function"
From Apache OpenOffice Wiki
< Documentation | How Tos
(→See also:) |
OOoWikiBot (Talk | contribs) m (Robot: Automated text replacement %s) |
||
| Line 21: | Line 21: | ||
: <i>Advanced topic:</i> | : <i>Advanced topic:</i> | ||
| − | : The parameters <tt>'''xvalues'''</tt> and <tt>'''yvalues'''</tt> are always evaluated as [[Documentation/How_Tos/Using Arrays|array formulas]]. | + | : The parameters <tt>'''xvalues'''</tt> and <tt>'''yvalues'''</tt> are always evaluated as * [[Documentation/How_Tos/Using Arrays|array formulas]]. |
=== Example: === | === Example: === | ||
| Line 27: | Line 27: | ||
: where the x values in A2:A6 are 1, 2, 3, 4, 5 and the y values in B2:B6 are 2, 4, 7, 8, 10 returns <tt>'''0.2'''</tt>. The equation of the straight line found is very nearly <i>y</i> = 2<i>x</i> (and would be if B4 contained 6) - thus the straight line very nearly (but not quite) goes through the origin. | : where the x values in A2:A6 are 1, 2, 3, 4, 5 and the y values in B2:B6 are 2, 4, 7, 8, 10 returns <tt>'''0.2'''</tt>. The equation of the straight line found is very nearly <i>y</i> = 2<i>x</i> (and would be if B4 contained 6) - thus the straight line very nearly (but not quite) goes through the origin. | ||
| − | + | {{Documentation/SeeAlso| | |
| − | [[Documentation/How_Tos/Calc: FORECAST function| | + | * [[Documentation/How_Tos/Calc: FORECAST function|FORECAST]], |
| − | [[Documentation/How_Tos/Calc: SLOPE function| | + | * [[Documentation/How_Tos/Calc: SLOPE function|SLOPE]], |
| − | [[Documentation/How_Tos/Calc: STEYX function| | + | * [[Documentation/How_Tos/Calc: STEYX function|STEYX]] |
| − | [[Documentation/How_Tos/Using Arrays| | + | * [[Documentation/How_Tos/Using Arrays|Array formulas]] |
| − | [[Documentation/How_Tos/Calc: Statistical functions| | + | * [[Documentation/How_Tos/Calc: Statistical functions|Statistical functions]] |
| − | [[Documentation/How_Tos/Calc: Functions listed alphabetically| | + | * [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] |
| − | [[Documentation/How_Tos/Calc: Functions listed by category| | + | * [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} |
Revision as of 13:57, 25 February 2009
INTERCEPT
Fits a straight line to data using linear regression and returns its intercept on the y-axis.
Syntax:
INTERCEPT(yvalues; xvalues)
- yvalues and xvalues are single row or column ranges specifying points in a set of data. yvalues and xvalues must be the same size.
- INTERCEPT fits a straight line through these data points, using the linear regression method (least squares). It then returns the y value where that straight line crosses the y-axis.
- The equation of a straight line may be given as y = a + bx. The linear regression method calculates:
-
- and
-
.
-
- a is the y-axis intercept returned by this function.
- Advanced topic:
- The parameters xvalues and yvalues are always evaluated as * array formulas.
Example:
INTERCEPT(B2:B6; A2:A6)
- where the x values in A2:A6 are 1, 2, 3, 4, 5 and the y values in B2:B6 are 2, 4, 7, 8, 10 returns 0.2. The equation of the straight line found is very nearly y = 2x (and would be if B4 contained 6) - thus the straight line very nearly (but not quite) goes through the origin.
