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gnuplot (1)

# Launch interactive shell. gnuplot # Launch interactive shell. gnuplot [opt] opt: -p ................ persist plot window -c <file> ......... run script file -e "<cmd1>; .." ... run cmd(s)

Frequently used configuration

# Plot title. set title "the plot" # Labels. set xlabel "abc" set ylabel "def" # Grid. set grind # Output format, 'help set term' for all output formats. set term svg # Output file. set output "out.svg" # Make axis logarithmic to given base. set logscale x 2 # Change separator, default is whitespace. set datafile separator ","

Plot

# With specific style (eg lines, linespoint, boxes, steps, impulses, ..). plot "<data_file>" with <plot_style> > cat data.txt 1 1 3 2 2 2 3 3 1 4 2 2 # Plot specific column. plot "data.txt" using 1:2, "data.txt" using 1:3 # Equivalent using the special file "", which re-uses the previous input file. plot "data.txt" using 1:2, "" using 1:3 # Plot piped data. plot "< head -n2 data.txt" # Plot with alternate title. plot "data.txt" title "moose"

Example: Specify range directly during plot

# Plot two functions in the range 0-10. plot [0:10] 10*x, 20*x

Example: multiple data sets in plot

# file: mem_lat.plot set title "memory latency (different strides)" set xlabel "array in KB" set ylabel "cycles / access" set logscale x 2 plot "stride_32.txt" title "32" with linespoints, \ "stride_64.txt" title "64" with linespoints, \ "stride_128.txt" title "128" with linespoints, \ "stride_256.txt" title "256" with linespoints, \ "stride_512.txt" title "512" with linespoints

On Linux x86_64, mem_lat.c provides an example which can be run as follows.

gcc -o mem_lat mem_lat.c -g -O3 -Wall -Werror for stride in 32 64 128 256 512; do \ taskset -c 1 ./mem_lat 128 $stride | tee stride_$stride.txt ; \ done gnuplot -p -c mem_lat.plot