[SOLVED] how to change timezone in a perl time variable?

Quakeboy02 · 09-27-2022, 06:02 PM

I have many thousands of lines of data from a GPSDO (GPS Disciplined Oscillator) with a UTC date encoded as "yyyymmddhhmmss". I need to convert those to my local timezone (CST) for plotting with gnuplot. I first process the data with perl, which creates a text file that is used by gnuplot. I've skimmed through many pages of perl time examples on the net, but I can't make enough sense of it to do anything. Any help would be appreciated.

By the way, I am not proficient with perl. The processing code was given to me by someone else long ago, and I've made trivial changes to it over the years.

Quakeboy02 · 09-27-2022, 07:22 PM

Never mind. Looking through my archives yet again, I finally found an example of what I wanted. I missed it at first, because it's in the gnuplot script, not in the perl reformatting code.

example snippet:

data:

Code:

20220927000001|000.8| 538025

code:

Code:

zone=5*3600
...
plot '$PWD/temp/fll1.dat' using (timecolumn(1)-$zone):2  axes x1y2 title 'Position' with lines \
     lw 1 lc rgb "\#0000FF"