test_that("rcm", {

  m <- lotri({
    a + b + c + d + e + f + g + h + i + j + k + l + m + n + o +
      p ~ c(0.4, 0, 0.3, 0, 0, 0, -0.1, 0, 0, 0.2, 0, 0, 0,
            0, 0.5, 0, 0, 0, 0, 0, 1.3, 0, 0, 0, 0, 0, -0.6, 0.8,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.2,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0.9, 0, 0, 0, 0, 0, 0, 0,
            0, 0, 0, 0.9, 0, 0, 0, 0, 0, 0, 0, 0, 0, -0.2, 0, 0.3,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2.1, 0.2, 0, 0, 0.2,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0.4, 0, 0, 0, 0, 0, -1.1,
            0.9, 0, 0, 0, 0, 0, 0, 0, 4.7, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0.5, 0, 0.2, 0, 0, 0, 1.9)})

  expect_equal(rcm(m),
               lotri({
                 p + l + j ~ c(1.9, 0.2, 0.3, 0.5, -0.2, 0.9)
                 o + g + f ~ c(4.7, 0.9, 0.8, -1.1, -0.6, 1.3)
                 n + d + a ~ c(0.4, 0.2, 0.2, 0.2, -0.1, 0.4)
                 m ~ 2.1
                 k ~ 0.9
                 i ~ 0.2
                 e ~ 0.5
                 b ~ 0.3
                 h ~ 0
                 c ~ 0
               }))

    m <- lotri({
      a + b + c + d + e + f + g + h + i + j + k + l + m + n + o +
        p ~ c(0.4, 0, 0.3, 0, 0, 0, -0.1, 0, 0, 0.2, 0, 0, 0,
              0, 0.5, 0, 0, 0, 0, 0, 1.3, 0, 0, 0, 0, 0, -0.6, 0.8,
              0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.2,
              0, 0, 0, 0, 0, 0, 0, 0, 0, 0.9, 0, 0, 0, 0, 0, 0, 0,
              0, 0, 0, 0.9, 0, 0, 0, 0, 0, 0, 0, 0, 0, -0.2, 0, 0.3,
              0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2.1, 0.2, 0, 0, 0.2,
              0, 0, 0, 0, 0, 0, 0, 0, 0, 0.4, 0, 0, 0, 0, 0, -1.1,
              0.9, 0, 0, 0, 0, 0, 0, 0, 4.7, 0, 0, 0, 0, 0, 0, 0, 0,
              0, 0.5, 0, 0.2, 0, 0, 0, 1.9)}, rcm=TRUE)

    expect_equal(m,
                 lotri({
                   p + l + j ~ c(1.9, 0.2, 0.3, 0.5, -0.2, 0.9)
                   o + g + f ~ c(4.7, 0.9, 0.8, -1.1, -0.6, 1.3)
                   n + d + a ~ c(0.4, 0.2, 0.2, 0.2, -0.1, 0.4)
                   m ~ 2.1
                   k ~ 0.9
                   i ~ 0.2
                   e ~ 0.5
                   b ~ 0.3
                   h ~ 0
                   c ~ 0
                 }))


})