diff options
Diffstat (limited to 'applause.lua')
| -rw-r--r-- | applause.lua | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/applause.lua b/applause.lua index d701330..702e1ce 100644 --- a/applause.lua +++ b/applause.lua @@ -896,11 +896,22 @@ function Stream:gnuplot() error("Cannot plot infinite stream") end + local cmd = "feedgnuplot --exit --lines --ymin -1 --ymax 1 --domain" + + local svg_file + if _G._send_display_data then + -- Some extremely crude support for plotting directly into Jupyter ILua cells. + -- NOTE: With io.popen() we cannot read and write to the pipe at the + -- same time, so we must dump the file to disk. + svg_file = os.tmpname() + cmd = cmd.." --terminal svg >"..svg_file + end + -- NOTE: We're not using Stream:pipe() here, so we can -- efficiently calculate a time index. -- FIXME: Using something like libplplot would be more -- efficient - local hnd = io.popen("feedgnuplot --exit --lines --ymin -1 --ymax 1 --domain", "w") + local hnd = io.popen(cmd, "w") hnd:setvbuf("full") local second = sec() @@ -912,6 +923,13 @@ function Stream:gnuplot() end) hnd:close() + + if _G._send_display_data then + _G._send_display_data{ + ['image/svg+xml'] = io.open(svg_file):read('*a') + } + os.remove(svg_file) + end end --- Print values of stream when they change. |