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Date: Thu, 6 Dec 2012 22:51:33 -0800 (PST)
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Subject: Trying to plot temperature & humidity
From: Erik Zweigle <erikzweigle@gmail.com>
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Xref: csiph.com comp.graphics.apps.gnuplot:1527

Hello,

I am trying to plot temperature and humidity on the same graph using multip=
le axes.  My data is formatted as so:

Date	Time	Temp =B0C	Relative humidity
2012/12/01	12:42:00	64.5	90
2012/12/01	12:43:00	64.7	91
2012/12/01	12:44:00	64.6	92

My commands are below.  But all I get are vertically stacked points.

set datafile separator ','
set timefmt "%Y/%m/%d %H:%M:%S"
set format x "%T"
set xdata time
set ytics nomirror
set y2tics
set ylabel "Temperature (Celsius)"
set y2label "Relative Humidity (%)"
set key autotitle columnhead
plot ["2012/12/01":] "chamber.csv" u 1:3 t "Temperature" axes x1y1 w p,"cha=
mber.csv" u 1:4 axes x1y2 t "Humidity" w p

Any hints?