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I am plotting large figures and the ticks on the X axes (horizontal) are colliding since there are many trailing zeros from numbers like "1000000" and then directly after the number "2000000".

As an example, I using this code:

lhs[x_, y_] := x^2+y^2
rhs[y_] := 1000^2

s1=1000;
ticks1 = Table[{Sign[i] Sqrt[Abs[i]], i}, {i, -s1, s1, 150}];

s2 = 1000;
ticks2 = Table[{Sign[i] Sqrt[Abs[i]], i}, {i, -s2, s2, 150}];

a=35;
ContourPlot[lhs[Sign[x] x^2, Sign[y] y^2] == rhs[Sign[y] y^2], 
  {x, -a, a}, {y, -a, a}, FrameTicks -> {{ticks1,None},{ticks2,None}}]

Which generates this image:

enter image description here

As you can see, the bottom ticks are all merged together.

Is there a way to make it look a bit nicer, either by rotating by 90 degrees the ticks on the bottom axes so they go "down" instead of "across" or better yet representing the ticks in scientific notation?

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1 Answer 1

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ContourPlot[
 lhs[Sign[x] x^2, Sign[y] y^2] == rhs[Sign[y] y^2], {x, -a, a}, {y, -a, a},
 FrameTicks :> {{ticks1, None}, {ticks2 /. {a_, b_} :> {a, Rotate[b, Pi/2]}, None}}]

enter image description here

Further options and demo for ScientificForm (don't forget the N!)

ContourPlot[
 lhs[Sign[x] x^2, Sign[y] y^2] == rhs[Sign[y] y^2], {x, -a, a}, {y, -a, a},
   FrameTicks :> {{ticks1, None}, {ticks2[[;; ;; 2]] /. {a_, b_} :> 
     {a, Rotate[ScientificForm[N @ b], Pi/4]}, None}}]

enter image description here

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  • $\begingroup$ Thanks for you reply, is there a way to write in scientific notation once rotated? Bacuse when the numbers get large it will look silly having 100000000000000000 for example. $\endgroup$
    – Gr Eg
    Commented Aug 2, 2017 at 18:21
  • $\begingroup$ See updated answer $\endgroup$
    – eldo
    Commented Aug 2, 2017 at 18:29
  • $\begingroup$ @GrEg and eldo, IMHO it looks better with the diagonal labels ending at the tick marks; see (9530) $\endgroup$
    – Mr.Wizard
    Commented Aug 5, 2017 at 20:56

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