Znn3bq.jpeg
±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 458  |  »Ø¸´: 6
µ±Ç°Ö÷ÌâÒѾ­´æµµ¡£

Сľ³æ161

[½»Á÷] ¡¾ÇóÖú¡¿matlab Çó»ý·ÖÎÊÌ⡾ÒÑËÑÎÞÖØ¸´¡¿

ÔÚmatlabÖУº¡·int('exp((-x^2)/2)/sqrt(2*pi)','x','-inf','inf')

                   ans =

                           erf(1/2*2^(1/2)*inf)     ---Ϊʲô»áÕâÑù£¿

ÔÙÊ䣺     >> erf(1/2*2^(1/2)*inf)
                 
                ans =

                             1      -----Õâ²ÅÊÇÎÒÒªµÄÕýÈ·´ð°¸£¡

ÇëÎÊÄÄλ´óÏÀÄܰïæ½âÊÍÏ£ºÎªÊ²Ã´Ò»²½µÃ²»µ½´ð°¸£¿
     ÊÇÒòΪ»ý·ÖÇø¼äÖк¬ÓÐÎÞÇî´óµÄÔ­ÒòÂð£¿
[search]matab  »ý·Ö[/search]
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

xiaopan099

ÎÒ¾ÍÖ±½ÓµÃ³ö1ÁË.

>> int('exp((-x^2)/2)/sqrt(2*pi)','x','-inf','inf')

ans =

1

ÎÒÖ±½ÓµÃµ½1 ÁË,
ÊDz»Êǰ汾µÄÔ­Òò,ÄãÓÐÄĸö°æ±¾µÄ,ÎÒµÄÊÇ6.5
2Â¥2007-10-18 14:41:25
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

earn

ľ³æ (ÕýʽдÊÖ)

ÎÒµÄ7.0.1µÄÒ²ÊÇÁ½²½²ÅÄܵõ½°¡£¡
3Â¥2007-10-21 09:47:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Сľ³æ161

ÎÒµÄÒ²ÊÇ6.5°æ±¾µÄ£¬µ«¸Ð¾õºÃÏóÒÔǰû³ö²»ÏÖÕâ¸öÎÊÌ⣬
µ«ÎÒ½ñÌìÓÖÕÒÁ˸ö7.01µÄ£¬»¹ÊÇÒ»Ñù£¬Ò»²½µÃ²»µ½´ð°¸£¡£¡£¡£¡
4Â¥2007-11-04 09:32:41
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

keithnwsuaf

¿ÉÄÜÄãÓõÄÊÇ·ûºÅʽµÄ»ý·Ö£¬½¨ÒéÓÃÊýÖµÀàÐ͵Ä
5Â¥2007-11-05 08:08:56
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhaohongliang

ÎÒµÄÊÇ6.5µÄ
Ò»²½¾ÍµÃµ½´ð°¸ÁË£¡
6Â¥2007-11-09 15:57:59
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

feetmark

ľ³æ (СÓÐÃûÆø)

ÒòΪ»ý·ÖÃüÁî¡°int¡±ÊÇ·ûºÅ»ý·Ö£¬µÃµ½µÄÊÇ·ûºÅ±í´ïʽ£¬
ÒªÓá°int¡±Ö±½ÓµÃµ½ÊýÖµ½â¿ÉÒÔ½áºÏ´®ÑÝËã·ûÇóÖµÃüÁî¡°eval¡±£¬
ÒÔϸñʽ¼´¿É:
eval(int('exp((-x^2)/2)/sqrt(2*pi)','x','-inf','inf'))
7Â¥2007-11-10 19:20:46
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ Сľ³æ161 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 293µ÷¼Á +19 yj1221 2026-04-08 20/1000 2026-04-08 22:00 by hypershenger
[¿¼ÑÐ] 309Çóµ÷¼Á£¨Ò»Ö¾Ô¸ºþÄÏ´óѧ£© +15 ´ô¹½²»ÊÇ´÷·ò 2026-04-02 16/800 2026-04-08 21:45 by zhouxiaoyu
[¿¼ÑÐ] Ò»Ö¾Ô¸211£¬»¯Ñ§Ñ§Ë¶£¬310·Ö£¬±¾¿ÆÖصãË«·Ç£¬Çóµ÷¼Á +14 ŬÁ¦·Ü¶·112 2026-04-06 15/750 2026-04-08 21:35 by zhouxiaoyu
[¿¼ÑÐ] 320·ÖÈ˹¤ÖÇÄܵ÷¼Á +9 Õñ¡ªTZ 2026-04-03 10/500 2026-04-08 19:56 by Õñ¡ªTZ
[¿¼ÑÐ] 325·Ö»¯Ñ§µ÷¼Á +9 15771691647 2026-04-02 9/450 2026-04-08 19:21 by ruoyu867
[¿¼ÑÐ] ²ÄÁϹ¤³Ì322·Ö +16 ¹þ¹þ¹þºðºðºð¹þ 2026-04-01 16/800 2026-04-08 16:34 by luoyongfeng
[¿¼ÑÐ] Çóµ÷¼Á£¡ÉúÎïÓëҽҩר˶ +9 Äæ×ªÂ½ÏÈÉú 2026-04-01 10/500 2026-04-08 10:37 by maolC
[¿¼ÑÐ] µ÷¼Á +3 µçÆø300Çóµ÷¼Á²» 2026-04-08 6/300 2026-04-08 09:39 by µçÆø300Çóµ÷¼Á²»
[¿¼ÑÐ] ר˶085403£¬291·Ö£¬ÓÐÁ½Æª×¨Àû£¬Ò»¹úÒ»½± +3 ¹þ¼ªßä¹þ¼ªßä 2026-04-07 3/150 2026-04-07 18:21 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 08600ÉúÎïÓëÒ½Ò©-327 +9 18755400796 2026-04-05 9/450 2026-04-06 22:35 by 52305043001
[¿¼ÑÐ] ¿¼Ñе÷¼Á +5 ÃÀÀöµÄyouth_ 2026-04-04 6/300 2026-04-06 06:57 by houyaoxu
[¿¼ÑÐ] Çóµ÷¼Á +7 ÕÅ.1 2026-04-05 7/350 2026-04-05 20:40 by à£à£à£0119
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +13 Ò»ÑùYWY 2026-04-03 14/700 2026-04-05 18:20 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 358Çóµ÷¼Á +7 Çïgk 2026-04-04 7/350 2026-04-05 13:29 by huangmoli
[¿¼ÑÐ] 338Çóµ÷¼Á +7 êɹ¦? 2026-04-03 7/350 2026-04-04 20:37 by À¶ÔÆË¼Óê
[¿¼ÑÐ] Ò»Ö¾Ô¸»¦9£¬ÇóÉúÎïѧµ÷¼Á£¬326·Ö +6 Áõīī 2026-04-04 6/300 2026-04-04 19:44 by ÌÆãå¶ù
[¿¼ÑÐ] 294Çóµ÷¼Á +6 Grey_Ey 2026-04-03 6/300 2026-04-03 20:46 by ÐÀϲ777
[¿¼ÑÐ] 320Çóµ÷¼Á +3 ũҵ¹¤³ÌÓëÐÅÏ¢¼ 2026-04-03 3/150 2026-04-03 11:40 by ÍÁľ˶ʿÕÐÉú
[¿¼ÑÐ] 260Çóµ÷¼Á +3 ÖìÜÆÁÕ 2026-04-02 3/150 2026-04-03 08:44 by yulian1987
[¿¼ÑÐ] Ò»Ö¾Ô¸Î人Àí¹¤0856£¬³õÊÔ334 +3 26¿¼ÑвÄÁÏ 2026-04-02 3/150 2026-04-02 21:22 by dongzh2009
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û