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CoStat's Data Handling Procedures
CoStat has a wide range of easy-to-use procedures
for manipulating the data.
The procedures on the Edit menu
let you manipulate
the rows and columns of the data file in various ways.
For example:
- Copy Rows and Copy Columns
copy a range of rows or columns.
- Delete Rows and Delete Columns
delete a range of rows and columns from the data file.
- Find finds
specific values in the data file based on a boolean
equation that you specify.
- Go To goes to
a specific row and column of the data file
based on a boolean equation that you specify.
- Insert Rows and Insert Columns
insert rows and columns in the data file.
- Format lets you
specify how you want the
data in one of the columns displayed. For example, you
can display values in various Date, Time, or Degrees
formats. You can also change the column name and
the width of the column.
- Keep If makes a subset of the datafile
based on a boolean equation which you specify.
The equation is applied
to each row of the datafile.
If the equation evaluates to True for a given
row, that row is kept; other rows are deleted.
- Move Rows and Move Columns
move a range of rows or columns.
- Rank
inserts a new column
and fills it with the ranking of each row
(based on the key columns that you specify).
- The six Rearrange procedures
completely rearrange the data in the data file
in various ways (for example, for transposing the array).
- Sort
sorts the
rows of the data file based on the
key columns that you specify.
The procedures on the Transformations menu
let you change the values in one of
the columns in the data file. For example,
- Accumulate replaces
the original numeric data in a column
with the cumulative total of the data.
- Grid uses the data from
three columns (containing scattered x,y,z values)
and creates three new columns with
gridded data (interpolated z values for each point on a grid).
This is useful for many types of data representations
in CoPlot.
- Interpolate starts
with two columns of numeric data (representing x and y),
and creates two new numeric x,y columns with many more points,
calculated by interpolation.
- Transform and If Then Else
transform the values
in a column of the data file based on an equation that
you specify.
The equations are applied to the datafile row by row.
- Regular fills a column
with regularly spaced numeric values, based on the
From, To and Increment values that
you specify.
- Round rounds floating point data
to some number of digits to the right of the decimal point.
- Smooth replaces the numeric values in a column
with a moving average (you can specify the weights
used for averaging the data).
- Unaccumulate replaces
the original numeric data in a column
with the difference between a given value and
the one above it.
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