K Release Notes–-V2.6
K.1 New Commands
The following new applications have been added:
- Converts between representations of complex data, such as extracting
or combining real and imaginary parts.
- Creates a description of selected regions in an image using the
IVOA’s Multi-Order Coverage (MOC) scheme.
- Places each input pixel into a bin defined by one or more index NDFs
and creates an output NDF holding all the values in each bin.
K.2 General Changes
The following applications now support huge NDFs: ADD, ADD, CDIV, CMULT, CSUB,
COLLAPSE, DIV, MFITTREND, MSTATS, MULT NDFCOPY, NDFTRACE, NUMB PERMAXES, STATS, and
SUB. Huge means more than 2,147,483,647 elements in an array component.
K.3 Modified Commands
The following applications have been modified:
- It can now process complex data.
- It is easier now to make several edits by supplying the NDF sections
and fill values in a text file. This is made possible new parameters
called MODE and FILE. The default for MODE preserves the historic
- Parameter KEYPOS(2) accepts negative values to instruct DISPLAY to plot
the key aligned with the image. Thus setting KEY=
TRUE and KEYPOS=
will draw the colour-table ramp so that it abuts the image with its
vertical extent matching the image, as commonly needed for journal
- The XMAP parameter now has a new option called
"LRLinear", which causes the
axis to be annotated linearly increasing from left to right. This differs
from the existing
"Linear" option, which may sometimes produce annotated
values that increase from right to left, depending on the nature of the WCS.
- New parameters called NDF and COMP allow the data, error, or variance
values at the catalogued positions within a chosen NDF to be displayed.
These use the interpolation method specified by the new Parameters
METHOD and PARAMS. The pixel values are also written to a new output
parameter called PIXVALS.
- Parameter METHOD has a new option
"BOTH" that compresses first with the
SCALED scheme then applies the DELTA scheme.
- A new parameter called CLEAR allows the corresponding bit within the
NDF’s QUALITY array to be cleared.
- A new parameter called FIT allows a linear fit to the scatter plot to
be calculated and displayed.
- The correlation coefficient is now calculated from the visible points
alone. Any points outside the bounds of the plot are ignored.
Previously, such points were not ignored.
- The reported number of points plotted now ignores any points outside
the bounds of the plot.
- A new parameter called LUT allows multiple values to be changed
simultaneously by supplying a table of old and new values in the form a
text file. Interpolation between the values can be performed if
- A new parameter called TYPE allows the data type of the output NDF to
be specified explicitly.