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- discard """
- matrix: "--mm:refc; --mm:orc"
- """
- import std/[stats, assertions]
- import std/math
- func `~=`(x, y: float32): bool =
- math.almostEqual(x, y)
- template main() =
- var rs: RunningStat
- rs.push(@[1.0, 2.0, 1.0, 4.0, 1.0, 4.0, 1.0, 2.0])
- doAssert(rs.n == 8)
- doAssert rs.mean ~= 2.0
- doAssert rs.variance() ~= 1.5
- doAssert rs.varianceS() ~= 1.71428571
- doAssert rs.skewness() ~= 0.81649658
- doAssert rs.skewnessS() ~= 1.01835015
- doAssert rs.kurtosis() ~= -1.0
- doAssert rs.kurtosisS() ~= -0.7000000000000001
- var rs1, rs2: RunningStat
- rs1.push(@[1.0, 2.0, 1.0, 4.0])
- rs2.push(@[1.0, 4.0, 1.0, 2.0])
- let rs3 = rs1 + rs2
- doAssert rs3.variance ~= rs.variance
- doAssert rs3.skewness ~= rs.skewness
- doAssert rs3.kurtosis ~= rs.kurtosis
- rs1 += rs2
- doAssert rs1.variance ~= rs.variance
- doAssert rs1.skewness ~= rs.skewness
- doAssert rs1.kurtosis ~= rs.kurtosis
- rs1.clear()
- rs1.push(@[1.0, 2.2, 1.4, 4.9])
- doAssert rs1.sum ~= 9.5
- doAssert rs1.mean() ~= 2.375
- when not defined(cpu32):
- # XXX For some reason on 32bit CPUs these results differ
- var rr: RunningRegress
- rr.push(@[0.0, 1.0, 2.8, 3.0, 4.0], @[0.0, 1.0, 2.3, 3.0, 4.0])
- doAssert rr.slope() ~= 0.9695585996955861
- doAssert rr.intercept() ~= -0.03424657534246611
- doAssert rr.correlation() ~= 0.9905100362239381
- var rr1, rr2: RunningRegress
- rr1.push(@[0.0, 1.0], @[0.0, 1.0])
- rr2.push(@[2.8, 3.0, 4.0], @[2.3, 3.0, 4.0])
- let rr3 = rr1 + rr2
- doAssert rr3.correlation() ~= rr.correlation()
- doAssert rr3.slope() ~= rr.slope()
- doAssert rr3.intercept() ~= rr.intercept()
- block: # bug #18718
- var rs: RunningStat
- rs.push(-1.0)
- doAssert rs.max == -1.0
- static: main()
- main()
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