Earthdata Forum

Posted: **Thu Jun 20, 2019 6:49 pm America/New_York**

Is there a function I can use at the command line to apply logarithm to my chlorophyll anomalies once they are calculated?

Posted: **Fri Jun 21, 2019 9:31 am America/New_York**

It's not SeaDAS, but you could use the standard linux program, bc, like this.


cat <<EOF >sample_chl_anomalies.txt
0.02
0.014
2.4
0.26
0.089
0.37
EOF

for c in `cat sample_chl_anomalies.txt`; do
  echo "l($c)" | bc -l >> log_sample_chl_anomalies.txt
done

Or you could use my favorite, reverse-polish, command-line calculator from the
GMT folks that provides a lot more mathematical functionality.


gmt math sample_chl_anomalies.txt LOG = log_sample_chl_anomalies.txt

Regards,
Norman