Hello,

Can you please suggest an analog waveform viewer, for viewing raw data from running batch ngspice simulations?

I have tried:
gaw - the best so far, but pretty bare
kicad-5 - even more bare, and found a memory leak
gtkwave - doesn't seem to support ngspice files but don't have high hopes as its focus is digital sims

These don't even come close to commercial vendors. But since I'm trying to use free tools I'm asking if you know something free to make a viable workflow.

audacity?

Audacity is a good ui, for audio applications. I need something that will plot voltage and current and other circuit characteristics.

I think this one is not being maintained.
https://en.m.wikipedia.org/wiki/File...creen_shot.png

Another one.
https://ra3xdh.github.io/
https://aur.archlinux.org/cgit/aur.g...BUILD?h=qucs-s
https://github.com/ra3xdh/qucs_s/rel...s-1.0.0.tar.gz

Have you looked at gnuplot? its a CLI, general purpose plotting program. Installed in Slackware by default.

Although not free to continue to use, Zelscope via WINE, works on Slackware and has a free trial period to determine if it suits your needs. I've tried it and found it quite good and very serious and flexible but since I have a professional hardware scope and only wanted a PC type software scope for simple audio work, it was f ar more than my needs so I didn't buy it. That could possibly work in your favor.

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Looks like gwave will fulfill the need.
https://sourceforge.net/projects/gwave/

The qucs-s program may be a good alternative to kicad for some things. But it looks like it is generally dumping out static plots from somewhere and you'll have to be in their workflow. The workflow I am looking for is an interactive viewer for the raw waveform data that I can dump out of batch spice simulations. So it would preferably be a program that can run standalone from an EDA package, and has tools to plot any choice of traces, zoom, pan, and place markers. It'd especially be nice if it can do calculations on the traces. gwave can do the basics properly, lacking calculations. gaw barely functioned and hard to read. Unfortunately gwave is a kind of old gnome dependent program, but I'll give it that is still being maintained by someone and still uses gtk2.

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After more testing, I realized that gaw is a fork of gwave, with features removed and bugs introduced. gwave seemed to work well, but I have an issue with that the values printed by the markers do not show a scale, but it changes scale if the value is large or small enough, which is going to be quite confusing. Oh well. I guess I'll primarily use the ascii plots out of ngspice, unless something else is found.

Would baudline work?

https://www.baudline.com/what_is_baudline.html

baudline, and the other scope tools, while they are similar, they do not support spice raw files.