# Ideas for Apache OpenOffice Calc, Writer

< Extensions‎ | Ideas
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## Function to return roots of quadratic equation

Formerly bug 122171

• error if complex root

## Numerical integration - Simpson's rules

Formerly bug 122202

Given: equally spaced x values, x0 till xn and respective function values in two columns

• Three points n=2: Simpson's 1/3 ruleFunction
Simp13 = (x2-x0)*(f(x0)+4f(x1)+f(x2))/6
• Four points n=3: Simpson's 3/8 ruleFunction
Simp38 = (x3-x0)*(f(x0)+3f(x1)+3f(x2)+f(x3))/8
• Five points n=4: Simpson's 1/3 rule on first and last three points
• Six points n=5: Simpson's 1/3 rule on first three points and Simpson's 3/8 rule on last last four points
• etc.

## Function to return astrological sign

• astrosign(19/07/2013)=Cancer

## Function to return calling code

• callcode(Colombia)=57

## Function to return chemical compound formula

• chemform(water)=H2O

## Resistor color code calculator

• rescol(brown,red,orange)=12000 (ohm)

## Newton Raphson solver

Proposed added function: given f(x)=0, d/dx(f(x))

• newraph(x,f(x),d/dx(f(x)),eps)=x-f(x)/(d/dx(f(x))

eps=convergence criteria

## Secant solver

Proposed added function: given f(x)=0 (unlike Newton Raphson, function derivative not given)

• secant(x_i-1,x_i,f(x),eps)=x_i-(f(x_i)*(x_i-1-x_i))/(f(x_i-1)-f(x_i))

eps=convergence criteria

## Function to return RAL color

• ral(2004) will color selection in "pure orange"

## Thunderbird contacts

Extension to make a list of contacts in Thunderbird.

## Create a function to find out the background color of a cell

I would like there to be a function that returns the background color of a cell. If the color is best described as an RGB set (0-255, or whatever), then there can be three arguments (location & RGB color).ie: bgcolor(row,column,RGBcolor) -returns the component (0-255) of the cell(row,column)so =color(25,16,RED) would return the RED component of cell(25,16). If the argument RED isn't a defined constant, simply establish a standard code (RED=1, GREEN=2, BLUE=3)Thanks,Will

## Provide a RICHTEXT() function for dynamic text formatting of formula output in cells

Formerly bug 105612

See Bugzilla description.

## ASAP Utilities

Formerly bug 122837

## Linear interpolation

Formerly bug 95135 See Bugzilla description.

## Statistical summary tool

Formerly bug 89980 See Bugzilla description.

Formerly bug 112459 See Bugzilla description.

## Series function

Formerly bug 108640 A function to create and print brief series in calc!

## Increased date range

Formerly bug 92996

Increase date handling range to year 1000 with option for users to enter date atwhich calendars changed between Julian and Gregorian and by how much (e.g. UK1752 by 30 days)

## RLPlot

Formerly bug 81726

## CellMaster

Formerly bug 123916

## Quandl

Formerly bug 122608

## Functions to return first or last non null value

Formerly bug 108441

## Formula comparison

Formerly bug 109178

## Export as MediaWiki

Formerly bug 102704

## Copy/Paste CSV file

Formerly bug 91425

## Revision history as auto generated index

Formerly bug 49963

## Per-session statistics

Formerly bug 16121

## PDF Merging

Formerly bug 75470

## Report builder

Formerly bug 108115

## transliteration

Formerly bug 17881