# Y-tick placement on log scale

**URL:** <https://discourse.julialang.org/t/y-tick-placement-on-log-scale/26515>\
**Category:** General Usage\
**Tags:** plotting\
**Created:** [July 18, 2019, 7:29pm UTC](https://discourse.julialang.org/t/y-tick-placement-on-log-scale/26515 "2019-07-18T19:29:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cgeoga](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cgeoga/32/216186_2.png) [@cgeoga](https://discourse.julialang.org/u/cgeoga)\
**Post date:** [July 18, 2019, 7:29pm UTC](https://discourse.julialang.org/t/y-tick-placement-on-log-scale/26515/1 "2019-07-18T19:29:36Z")

</div>

Hello,

I’m hoping to get some advice on controlling y-tick placement on a log-log plot. I’m try to make the axis ticks on a plot bigger, and I’m running into this issue:

 ![tick_issue](https://global.discourse-cdn.com/julialang/original/3X/0/e/0e2b596bb7aac072c061149f9e85c767388992b2.png)

Considering that I need to make the font that size, I want to tell the left plot not to place so many ticks that the numbers overlap. But I’m having some trouble doing that with the `yticks=...` argument in Plots.jl.

Can anybody help me? Here is a MWE-type example of the code that makes these figures (using only the data from the red lines in the above plots), with the exact code that made them located [here](https://bitbucket.org/cgeoga/kernelmatrices.jl/src/master/example/paperscripts/figures/trace_plots.jl). The MWE example doesn’t show exactly the same issue, but even with a little playing around I can make the y-tick placement behave pretty irregularly. It would be nice if I could find a way to make it put ticks at every power and half-power of ten, or something.

I have to use PlotlyJS, and if it is relevant I’m making these plots on a Fedora linux box, with Plots.jl version 0.26.0, PlotlyJS version 0.12.5.

```julia
using Plots
plotlyjs()

X = [1.0,2.0,3.0,4.0,5.0,10.0,20.0,30.0,50.0,100.0]
Y = [3.74951130034201e-9,3.0015593753166335e-9,1.993477449008477e-9,2.1056410677307034e-9,2.1116576643500775e-9,1.2943044303709163e-9,1.2441630841653538e-9,7.370279048528063e-10,6.705537380896856e-10,4.3901063848787426e-10]
Z = [0.2907033044503297,0.1769673209676217,0.16545431406655836,0.10663529522976559,0.11626557444231143,0.09452702029920076,0.05620186644219592,0.04992161525344989,0.0414831389006808,0.025665676468083744]

Y_ticks = [5.0e-9, 1.0e-9, 5.0e-10, 1.0e-10]
Z_ticks = [0.5, 0.1, 0.05, 0.01]

pt1 = plot(X, Y, yaxis=:log10, xaxis=:log10, tickfont=font(12), leg=false, 
           grid=false, yticks=Y_ticks)

pt2 = plot(X, Z, yaxis=:log10, xaxis=:log10, tickfont=font(12), leg=false, 
           grid=false, yticks=Z_ticks)

```

Thank you for very much for reading!