Compute Averages and Totals
Description
This tool analyzes daily or monthly data to create time series of averages or totals. These analyses can be run for on a monthly basis or during a specific range of months (e.g., seasonal, annual).
Discussion of the Output Data
If an analysis is performed during a range of months that encompass two years, then the year reported in the output file will be that associated with the end month (i.e., if the start month is December and the end month is February, then an average value associated with 1872 in the output file will be the average from December 1871-February 1872). Any missing data encountered by Dendro Tools results in a flag. The number of flags is reported in the output file, and any result other than zero should be checked to determine if the missing data impact the results. Dendro Tools will also report “-99” for a particular month, season, or year if all data are missing, which prohibit any calculations.
Input
File
Select the temperature data to analyze by clicking on "Browse" and navigating to the proper file.
Input Data Format
If precipitation data are daily:
If precipitation data are monthly:
Each "/" is a tab (i.e., data should be tab-delimited). Missing Data should be denoted as "-99".
Start Row
This input is the row number where the main data to be processed begin in the input file selected above. An example of how row numbers are entered is shown in Figure 2 located in the Running Dendro Tools topic.
Data Format
Select whether the data are in daily format or in monthly format. Daily is selected by default.
Data Column
This input is the column number where the data are located in the input file selected above. An example of how column numbers are entered is shown in Figure 2 located in the Running Dendro Tools topic.
Parameters
Average / Total
Select whether data values should be averaged or totaled.
Compute by Month
This computation method will average or total the data by months that are checked by the user. If "Jan" and "Feb" are checked, then the computation will be run twice--once for January data and once for February data.
Compute by Range
Selecting this computation type will enable the "Start Month" and "End Month" fields, which will allow for the computation to be performed across a range of months (e.g., seasonal, annual). For example, to analyze Northern Hemispheric winter, select "December" as the start month and "February" as the end month.
Output
File
Select the file where the numerical results will be stored.
Header
Information entered here will be output in the first line of the output file.