checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Namespaces in Imports field not imported from:
  ‘e1071’ ‘utils’
  All declared Imports should be used.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Namespaces in Imports field not imported from:
  ‘e1071’ ‘utils’
  All declared Imports should be used.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  xytb-class.Rd: distVincentyEllipsoid
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^
checkRd: (-1) xytb-class.Rd:26: Lost braces; missing escapes or markup?
    26 | v: \tab speed (m.s^{-1})\cr
       |                    ^