Circos > Documentation > Tutorials > Ticks And Labels > Relative Ticks
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20 imperatives of information design — BioVis 2012

Use the latest version of Circos and read Circos best practices—these list recent important changes and identify sources of common problems.
If you are having trouble, post your issue to the Circos Google Group and include all files and detailed error logs. Please do not email me directly unless it is urgent—you are much more likely to receive a timely reply from the group.

4 — Tick Marks, Grids and Labels

7. Relative Ticks

circos.conf


<colors>
<<include etc/colors.conf>>
</colors>

<fonts>
<<include etc/fonts.conf>>
</fonts>

<<include ideogram.conf>>
<<include ticks.conf>>

karyotype   = data/karyotype.human.txt

<image>
dir = /tmp
file  = circos-tutorial.png
# radius of inscribed circle in image
radius         = 1500p
background     = white
# by default angle=0 is at 3 o'clock position
angle_offset   = -90
</image>

chromosomes_units           = 1000000
# use this to see how relative ticks can be drawn relative to
# the ideograms (use rdivisor=ideogram in the tick blocks)
#chromosomes                 = hs1[a]:0-75;hs1[b]:100-150;hs1[c]:200-)
chromosomes = hs1
chromosomes_display_default = no

anglestep       = 0.5
minslicestep    = 10
beziersamples   = 40
debug           = no
warnings        = no
imagemap        = no

# don't touch!
units_ok        = bupr
units_nounit    = n

svg_font_scale = 1.3

ideogram.conf


<ideogram>

<spacing>

default = 3u
break   = 1u

</spacing>

# thickness (px) of chromosome ideogram
thickness        = 100p
stroke_thickness = 2
# ideogram border color
stroke_color     = black
fill             = yes
# the default chromosome color is set here and any value
# defined in the karyotype file overrides it
fill_color       = black

# fractional radius position of chromosome ideogram within image
radius         = 0.75r
show_label     = no
label_with_tag = yes
label_font     = condensedbold
label_radius   = dims(ideogram,radius_outer) + 0.075r
label_size     = 48p

# cytogenetic bands
band_stroke_thickness = 2

# show_bands determines whether the outline of cytogenetic bands
# will be seen
show_bands            = yes
# in order to fill the bands with the color defined in the karyotype
# file you must set fill_bands
fill_bands            = yes

</ideogram>

ticks.conf


show_ticks          = yes
show_tick_labels    = yes

<ticks>

radius         = dims(ideogram,radius_outer)
multiplier     = 1/1u
color          = black
force_display  = yes
thickness      = 2p
show_label     = yes
format         = %d

<tick>
show           = yes
spacing        = 1u
rspacing       = 0.02
# this is the default spacing type
spacing_type   = absolute
size           = 8p
label_size     = 24p
offset         = 10p
</tick>

<tick>
# when spacing_type is relative, define
# rspacing to be the increment
show           = yes
rspacing       = 0.01
spacing_type   = relative
size           = 8p
color          = red
label_size     = 36p
offset         = 80p
label_relative = yes
rmultiplier    = 100
suffix         = %
# This will make ticks spaced relatively by ideogram,
# and not chromosome. This setting is useful when
# the chromosome is displayed as multiple ideograms
# rdivisor        = ideogram
</tick>

<tick>
show           = yes
rspacing       = 0.1
spacing_type   = relative
size           = 12p
thickness      = 3p
color          = blue
label_size     = 36p
offset         = 210p
label_relative = yes
rmultiplier    = 10
suffix         = /10
#rdivisor       = ideogram
</tick>

</ticks>