関数chi2invのC言語における動作
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C言語でカイ2乗検定をしたく,関数chi2invをC言語に変換し,ディレクトリ最上部の全てのCファイルとhファイルを実装して動作させてみたところ,自由度2と4における逆関数の値がそれぞれの場合で全て2.0000と4.0000となってしまいます.これは仕様でしょうか?
以下に実際に利用したコードを記します.
#include <stdio.h>
#include "./CHIINV/include.h" //生成した全てのヘッダファイル,cファイルをまとめたヘッダファイル
int main(void){
int k = 0; //ループ用ならびに自由度
double alpha = 0.0; //ループ用ならびに有意水準
//自由度30まで
for(k = 1; k <= 30; k++){
//有意水準0.05まで
for(alpha = 0.01; alpha <= 0.05; alpha += 0.01){
//カイ2乗分布表の数値を出力
printf("chi2(%.2f, %d) = %.3f\n", 1.0-alpha, k, CHIINV(1.0-alpha, (double)k));
//先程の型付けに関する注意点.ここではint型変数kをdouble型にキャストして代入
}
}
return 0;
}
また,実行結果は以下の通りです.
./testCHIINV
chi2(0.99, 1) = 6.635
chi2(0.98, 1) = 5.412
chi2(0.97, 1) = 4.709
chi2(0.96, 1) = 4.218
chi2(0.95, 1) = 3.841
chi2(0.99, 2) = 2.000
chi2(0.98, 2) = 2.000
chi2(0.97, 2) = 2.000
chi2(0.96, 2) = 2.000
chi2(0.95, 2) = 2.000
chi2(0.99, 3) = 11.345
chi2(0.98, 3) = 9.837
chi2(0.97, 3) = 8.947
chi2(0.96, 3) = 8.311
chi2(0.95, 3) = 7.815
chi2(0.99, 4) = 4.000
chi2(0.98, 4) = 4.000
chi2(0.97, 4) = 4.000
chi2(0.96, 4) = 4.000
chi2(0.95, 4) = 4.000
chi2(0.99, 5) = 15.086
chi2(0.98, 5) = 13.388
chi2(0.97, 5) = 12.375
chi2(0.96, 5) = 11.644
chi2(0.95, 5) = 11.070
chi2(0.99, 6) = 16.812
chi2(0.98, 6) = 15.033
chi2(0.97, 6) = 13.968
chi2(0.96, 6) = 13.198
chi2(0.95, 6) = 12.592
chi2(0.99, 7) = 18.475
chi2(0.98, 7) = 16.622
chi2(0.97, 7) = 15.509
chi2(0.96, 7) = 14.703
chi2(0.95, 7) = 14.067
chi2(0.99, 8) = 20.090
chi2(0.98, 8) = 18.168
chi2(0.97, 8) = 17.010
chi2(0.96, 8) = 16.171
chi2(0.95, 8) = 15.507
chi2(0.99, 9) = 21.666
chi2(0.98, 9) = 19.679
chi2(0.97, 9) = 18.480
chi2(0.96, 9) = 17.608
chi2(0.95, 9) = 16.919
chi2(0.99, 10) = 23.209
chi2(0.98, 10) = 21.161
chi2(0.97, 10) = 19.922
chi2(0.96, 10) = 19.021
chi2(0.95, 10) = 18.307
chi2(0.99, 11) = 24.725
chi2(0.98, 11) = 22.618
chi2(0.97, 11) = 21.342
chi2(0.96, 11) = 20.412
chi2(0.95, 11) = 19.675
chi2(0.99, 12) = 26.217
chi2(0.98, 12) = 24.054
chi2(0.97, 12) = 22.742
chi2(0.96, 12) = 21.785
chi2(0.95, 12) = 21.026
chi2(0.99, 13) = 27.688
chi2(0.98, 13) = 25.472
chi2(0.97, 13) = 24.125
chi2(0.96, 13) = 23.142
chi2(0.95, 13) = 22.362
chi2(0.99, 14) = 29.141
chi2(0.98, 14) = 26.873
chi2(0.97, 14) = 25.493
chi2(0.96, 14) = 24.485
chi2(0.95, 14) = 23.685
chi2(0.99, 15) = 30.578
chi2(0.98, 15) = 28.259
chi2(0.97, 15) = 26.848
chi2(0.96, 15) = 25.816
chi2(0.95, 15) = 24.996
chi2(0.99, 16) = 32.000
chi2(0.98, 16) = 29.633
chi2(0.97, 16) = 28.191
chi2(0.96, 16) = 27.136
chi2(0.95, 16) = 26.296
chi2(0.99, 17) = 33.409
chi2(0.98, 17) = 30.995
chi2(0.97, 17) = 29.523
chi2(0.96, 17) = 28.445
chi2(0.95, 17) = 27.587
chi2(0.99, 18) = 34.805
chi2(0.98, 18) = 32.346
chi2(0.97, 18) = 30.845
chi2(0.96, 18) = 29.745
chi2(0.95, 18) = 28.869
chi2(0.99, 19) = 36.191
chi2(0.98, 19) = 33.687
chi2(0.97, 19) = 32.158
chi2(0.96, 19) = 31.037
chi2(0.95, 19) = 30.144
chi2(0.99, 20) = 37.566
chi2(0.98, 20) = 35.020
chi2(0.97, 20) = 33.462
chi2(0.96, 20) = 32.321
chi2(0.95, 20) = 31.410
chi2(0.99, 21) = 38.932
chi2(0.98, 21) = 36.343
chi2(0.97, 21) = 34.759
chi2(0.96, 21) = 33.597
chi2(0.95, 21) = 32.671
chi2(0.99, 22) = 40.289
chi2(0.98, 22) = 37.659
chi2(0.97, 22) = 36.049
chi2(0.96, 22) = 34.867
chi2(0.95, 22) = 33.924
chi2(0.99, 23) = 41.638
chi2(0.98, 23) = 38.968
chi2(0.97, 23) = 37.332
chi2(0.96, 23) = 36.131
chi2(0.95, 23) = 35.172
chi2(0.99, 24) = 42.980
chi2(0.98, 24) = 40.270
chi2(0.97, 24) = 38.609
chi2(0.96, 24) = 37.389
chi2(0.95, 24) = 36.415
chi2(0.99, 25) = 44.314
chi2(0.98, 25) = 41.566
chi2(0.97, 25) = 39.880
chi2(0.96, 25) = 38.642
chi2(0.95, 25) = 37.652
chi2(0.99, 26) = 45.642
chi2(0.98, 26) = 42.856
chi2(0.97, 26) = 41.146
chi2(0.96, 26) = 39.889
chi2(0.95, 26) = 38.885
chi2(0.99, 27) = 46.963
chi2(0.98, 27) = 44.140
chi2(0.97, 27) = 42.407
chi2(0.96, 27) = 41.132
chi2(0.95, 27) = 40.113
chi2(0.99, 28) = 48.278
chi2(0.98, 28) = 45.419
chi2(0.97, 28) = 43.662
chi2(0.96, 28) = 42.370
chi2(0.95, 28) = 41.337
chi2(0.99, 29) = 49.588
chi2(0.98, 29) = 46.693
chi2(0.97, 29) = 44.913
chi2(0.96, 29) = 43.604
chi2(0.95, 29) = 42.557
chi2(0.99, 30) = 50.892
chi2(0.98, 30) = 47.962
chi2(0.97, 30) = 46.160
chi2(0.96, 30) = 44.834
chi2(0.95, 30) = 43.773
ちなみに,include.hの中は以下の通りです.
#include "CHIINV.c"
#include "CHIINV.h"
#include "CHIINV_initialize.c"
#include "CHIINV_initialize.h"
#include "CHIINV_terminate.c"
#include "CHIINV_terminate.h"
#include "CHIINV_types.h"
#include "gammaln.h"
#include "gammaln.c"
#include "gammaincinv.c"
#include "gammaincinv.h"
#include "rtGetNaN.h"
#include "rtGetNaN.c"
#include "rt_nonfinite.c"
#include "rt_nonfinite.h"
#include "rtGetInf.c"
#include "rtGetInf.h"
#include "rtwtypes.h"
よろしくお願いいたします.
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