LOFAR folks have some really huge Filterbank files E.g. 140 GB. Today's blimpy cannot plot them because it tries to get the whole data matrix into memory first.
New approach: Slice them into manageable sized sticks by fine-channel frequency subrange and plot each one separately. Optionally, concatenate all of the generated PNG files horizontally or vertically into one PNG.
New utility function: stix
stix -h
usage: stix [-h] [--plot_dir PLOT_DIR] [--source_name SOURCE_NAME] [--stitch {n,v,h}] [--dpi DPI] [--width WIDTH] [--height HEIGHT] input_file chunk_count
Make waterfall plots from a single huge file, viewed from top to bottom.
positional arguments:
input_file List of files to plot
chunk_count Count of same-sized frequency chunks
optional arguments:
-h, --help show this help message and exit
--plot_dir PLOT_DIR, -p PLOT_DIR
Directory to receive the plot (.png). Default: current directory.
--source_name SOURCE_NAME, -n SOURCE_NAME
Source name to override the header field. Default: None.
--stitch {n,v,h}, -s {n,v,h}
Stitch files: n(no stitching), v(vertical), or h(horizontal). Default: n.
--dpi DPI, -d DPI Single image file dots per inch. Default: 200.
--width WIDTH, -w WIDTH
Single image file image width in inches. Default: 10.
--height HEIGHT, -t HEIGHT
Single image file image height in inches. Default: 8.
LOFAR folks have some really huge Filterbank files E.g. 140 GB. Today's blimpy cannot plot them because it tries to get the whole data matrix into memory first.
New approach: Slice them into manageable sized sticks by fine-channel frequency subrange and plot each one separately. Optionally, concatenate all of the generated PNG files horizontally or vertically into one PNG.
New utility function:
stix