plotting - How to make frame ticks' labels have same number of digits after decimal point?

I'm making the ticks labels of my plot using the rule:

FrameTicks -> {{N@FindDivisions[{Min@data1, Max@data2}, 6], None},
    {Range[1960, 2015, 10], None}}

This is generating the ticks I want on both axes pretty well. The only problem is that the y-axis ticks vary in the number of decimal places, which I do not want. Is there a way to make all those numbers have the same number of decimal places as the one with the most decimal places?

I wanted to use something like NumberForm[ticks, {∞, n}] with ticks being the N@..., 6] above, but I'm not sure what n should be to just go with the tick mark with the most decimal places.

Thank you!

Answer

First, generate the ticks and their labels with whatever range is desired.

ticks[min_, max_] := Module[{d = FindDivisions[{min, max}, 6], n}, 
    n = Ceiling@Log10@Max@Denominator@d; {#, NumberForm[#, {∞, n}]} & /@ N@d]

For instance,

t = ticks[.01,.03]
(* {{0.01, NumberForm[0.01, {∞, 3}]}, {0.015, NumberForm[0.015, {∞, 3}]}, 

    {0.02, NumberForm[0.02, {∞, 3}]}, {0.025, NumberForm[0.025, {∞, 3}]}, 
    {0.03, NumberForm[0.03, {∞, 3}]}} *)

(The Output actually looks like .)

They can then be used as, for instance,

Plot[x, {x, 0, .04}, Ticks -> {Automatic, t}, AspectRatio -> 1]

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