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93 lines
2.5 KiB
Plaintext
93 lines
2.5 KiB
Plaintext
7 months ago
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*! version 1.0.0 TJS 9jun2000
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program define nctncp, rclass
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version 6.0
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args t p df
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if "`p'" == "" {
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di in gr "Syntax for " in wh "nctncp" in gr " is:" _n
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di in wh " nctncp " in gr "t' p df" _n
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di in gr " where " in wh "t' " in gr "is the observed t"
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di in wh " p " in gr "is the probability"
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di in wh " df " in gr "is the degrees of freedom" _n
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di in wh " nctncp " in gr "computes " in wh "delta" _c
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di in gr " such that P(t<=" in wh "t'" in gr "| " in wh "delta" _c
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di in gr ", " in wh "df" in gr ") = " in wh "p"
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di in gr " and returns the value in result " _c
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di in wh "r(delta) " in gr "and global " in wh "S_1" in gr "."
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global S_1 = .
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return scalar delta = .
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exit 9
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}
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if `p' < 0 | `p' > 1 {
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di in re "p must be between 0 and 1"
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global S_1 = .
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return scalar delta = .
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exit 498
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}
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if `df' != int(`df') | `df' < 1 {
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di in re "degrees of freedom must be a positive integer"
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global S_1 = .
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return scalar delta = .
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exit 498
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}
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capture which ridder
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if _rc == 111 {
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di in re "nctncp requires installation of program ridder."
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di in wh " (see STB-24, insert ssi5.4 for ridder)."
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global S_1 = .
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return scalar delta = .
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exit 111
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}
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capture which nctprob
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if _rc == 111 {
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di in re "nctncp requires installation of program nctprob."
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di in wh " (contact T. J. Steichen at steicht@rjrt.com for nctprob)."
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global S_1 = .
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return scalar delta = .
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exit 111
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}
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local min = `t' - 100 / (`df'^.44)
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local max = `t' + 100 / (`df'^.44)
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if `p' > 0.5 { local max = `t' }
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else { local min = `t' }
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cap ridder nctprob `t' X `df' returns macro S_1 = `p' /*
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*/ from `min' to `max'
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if _rc == 430 {
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local min = $S_1 - 1
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local max = $S_1 + 1
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qui ridder nctprob `t' X `df' returns macro S_1 = `p' /*
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*/ from `min' to `max'
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}
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if _rc == 409 {
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di in re "internal error in guessing range: solution not bounded."
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di in wh " (please report this error to T. J. Steichen at "
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di in wh " steicht@rjrt.com, along with command attempted)."
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global S_1 = .
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return scalar delta = .
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exit 409
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}
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if _rc == 198 {
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di in re "nctncp requires version 3.0.5 or later of integ."
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di in wh " (use " in ye "which integ " _c
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di in wh "to check version number)."
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global S_1 = .
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return scalar delta = .
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exit 198
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}
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return scalar delta = $S_1
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di _n in gr " delta =" in ye %10.6f $S_1
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di _n in gr " P(t <= " `t' " | delta = " _c
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di in ye $S_1 in gr ", df = " `df' _c
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di in gr ") = " `p'
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end
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