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## Tickmarks in multiples of Pi

Maple
Question: How do I generate tickmarks in multiples of Pi? The answer has been posted before but this question comes up often enough that it is worth repeating. In Maple 10 and earlier versions, you had to build a custom list of tickmarks, and the only way you could get the Greek pi symbol was to use the Symbol font. In Maple 11, you can use the new 'spacing' structure with the 'tickmarks' option. To get tickmarks in multiples of Pi, use: > plot(sin(x), x=0..8*Pi, tickmarks=[spacing(Pi), default]); To get tickmarks spaced by 2*Pi, replace spacing(Pi) with spacing(2*Pi). To get the tickmarks occuring on the odd multiples of Pi, use spacing(2*Pi, Pi). The second argument is a fixed value from which the other tickmarks are determined. Currently, rational multiples of Pi cannot be displayed, so Pi/2 will show up as 0.5 Pi, if you use spacing(Pi/2). To get a display with fractions, you need to replace the spacing structure with a list of custom tickmarks: [seq(i*Pi/2=i*Pi/2, i=1..4)].

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