Differences

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--- software:gnuplot [2015/02/10 09:32]
cyril [Plot data from a file]
+++ software:gnuplot [2024/04/19 09:54] (current)
cyril autotitle
@@ Line 59: / Line 59: @@
 set x2label ""
 set y2label ""
+</code>
+  * Log scale.<code gnuplot>
+set logscale x 2
+set logscale y 10
 </code>
@@ Line 69: / Line 74: @@
 set key left bottom
 set key 100,100
+</code>
+  * Automatic legend.<code gnuplot>
+set key autotitle columnheader
 </code>
@@ Line 137: / Line 146: @@
   * **every** Specifying lines to use (every 2 lines from line 50 to line 1050).<code gnuplot>
 plot "data.dat" using 4:5 every 2::50::1050
+</code>
+  * **separator** Set the field separator:<code gnuplot>
+set datafile separator ","
 </code>
@@ Line 159: / Line 172: @@
 plot "data1.dat" using 4:5 lt rgb "red"
 plot "data1.dat" using 4:5 lt rgb "#FF0000"
+</code>
+  * **palette** Colors as value.<code gnuplot>
+set palette defined (0 "black", 1 "red")
+plot "data1.dat" using 1:2:0 w p palette
 </code>
@@ Line 190: / Line 208: @@
 </code>
-  * **($1)** Arithmetics on columns.<code gnuplot>
+  * **($1)** Arithmetics on columns data.<code gnuplot>
 plot "data1.dat" using 4:($5/2+14)
 # where $n means column n
+</code>
+  * **(column())** Arithmetics on columns indices.<code gnuplot>
+plot i=1, "data1.dat" using 1:(column(i+1))
 </code>
@@ Line 219: / Line 241: @@
 plot for [file in "run1.dat run2.dat run3.dat"] file using 1:2
 </code><code gnuplot>
-plot for [i=1:3] run.dat using i
+plot for [i=1:3] run.dat using i t sprintf("curve %s", columnheader(i))
 </code><code gnuplot>
 file(n) = sprintf("run_%d.dat",n)