Transformation
See Also
This menu provides a range of standard transformations for data.

Data

Specifies a variate containing data to be transformed.

Transformation

A number of standard transformations are available as listed below. The equations use X to represent the data variate, and may involve one or two additional scalar constants, denoted by c and m, values for which must be specified.

TransformationGenStat Expression
Linearm * (X + c)
Power(X + c)**m
Square root(X + c)**0.5
Log (base 10)log10(X + c)
Log (base e)log(X + c)
Antilog (base 10)10**X - c
Antilog (base e)exp(X) - c
Exponentialexp(X + c)
Logitlog(X / (c - X))
Inverse logitc / (1 + exp(-X))
Double loglog(-log(X/c))
Inverse double logc * exp(-exp(X))
Complementary log-loglog(-log(1 - (X/c)))
Inverse complementary log-logc * (1 - exp(-exp(X)))
Accumulationvalue in unit i of result is the sum of the first i units of X
Differencingvalue in unit i of result is set to xi − xi-c

Parameters in equation

Allows you to specify values for the additional constants, m and c, as appropriate.

Save In

Specifies a data structure to contain the transformed values.

Available Data

This lists variates that can be used for Data and Save In. Double-click a name to copy it into the current input field, alternatively you can just type it in from the keyboard.

Display In Spreadsheet

Allows you to display the results in a spreadsheet. You can select the sheet from the list of current open spreadsheets or request a new spreadsheet be created. Note: the number of rows of the spreadsheet must match the length of the results formed by the calculation, otherwise a new sheet will be used.

See Also