Select menu: Data | Transformations
This provides a range of standard transformations for data.
- After you have imported your data, from the menu select
Data | Transformations.
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.
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.
Data
Specifies a variate containing data to be transformed.
Transformation | Genstat Expression |
Linear | m * (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 |
Exponential | exp(X + c) |
Logit | log(X / (c – X)) |
Inverse logit | c / (1 + exp(-X)) |
Double log | log(-log(X/c)) |
Inverse double log | c * exp(-exp(X)) |
Complementary log-log | log(-log(1 – (X/c))) |
Inverse complementary log-log | c * (1 – exp(-exp(X))) |
Accumulation | value in unit i of result is the sum of the first i units of X |
Differencing | value in unit i of result is set to x_{i} − x_{i-c} |
Save in
Specifies a data structure to contain the transformed values.
Parameters in equation
Lets you specify values for the additional constants, m and c, as appropriate.
Display in spreadsheet
Lets you 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.
Action Icons
Pin | Controls whether to keep the dialog open when you click Run. When the pin is down the dialog will remain open, otherwise when the pin is up the dialog will close. | |
Restore | Restore names into edit fields and default settings. | |
Clear | Clear all fields and list boxes. | |
Help | Open the Help topic for this dialog. |
See also
- Calculations menu
- Unit conversions menu
- Data Menu