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Histogram Plot Window
The Histogram Plot (
)
plots 1-dimensional histograms.
In many respects it is like the Plane Plot,
but it has an additional fixed control
Bars
and the scrolling works a bit differently.
See the Window Overview
for features common to all plotting windows.
The following non-standard action is available from the toolbar
as well as the Plot menu:
-
Rescale Y
- Adjusts the vertical range of the visible data region
to accommodate all the histogram bars in the currently
visible horizontal region of the plot.
The horizontal range is not changed.
In addition, the histogram window lets you export the binned data as
a new table, either saving it or loading it directly into TOPCAT's
table list.
The following actions are available in the Export menu:
-
Save as Table
- The bin counts/sums corresponding to the currently plotted histogram
will be written to disk in tabular form. The first two columns give
the lower and upper bounds of each bin, and the subsequent columns
give the occupancies of each bin for each plotted data set.
If only one dataset is plotted, there will only be three columns.
-
Import as Table
- Assembles a table as per the Save option above,
but rather than writing it to disk imports it directly into TOPCAT,
where it can be manipulated in all the usual ways.
The following subsections describe
navigation,
axis configuration and
bar configuration.
The Histogram Plot offers only the following plot controls:
Next Previous Up Contents
Next: Histogram Navigation
Up: Plot Windows
Previous: Aux Mode
TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page:
http://www.starlink.ac.uk/topcat/
Author email:
m.b.taylor@bristol.ac.uk
Mailing list:
topcat-user@bristol.ac.uk