Image:Archimedian spiral.png

# Output to png file:
set terminal png small color; set output "archimedian_spiral.png"

# Same scale for both axes, half-size output:
set size ratio -1 0.5, 0.5

# Axis in the center, no tick marks:
set zeroaxis; set noxtics; set noytics; set noborder

set title "One arm of an Archimedian spiral"

# More sample points to produce smoother picture:
set samples 170

set polar;
plot [0:6*pi] [-7:9] [-7:6] t/2.6 notitle

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