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yoyo0201

½ð³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
10Â¥: Originally posted by 43fd6ys at 2015-08-02 20:58:56
Ó¦¸ÃÈ«Õý,¼ÆËãΪ¸ºÓ¦¼ì²éËã·¨µÄÕýÈ·ÐÔ.

Ö±½ÓÓÃmatlabµÄ ksdensityµÃµ½µÄ½á¹û£¬ÎÒ¿´help£¬»¹Ã»ÓиãµàÇø¼äΪÕýµÄ¡£±à³ÌÕæÐÄ·³
11Â¥2015-08-02 22:15:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

yoyo0201

½ð³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
8Â¥: Originally posted by mygt_hit at 2015-08-02 15:12:34
Äã¿´¿´KsdensityµÄ°ïÖú£¬Í¨¹ýÊôÐÔÃû-ÊôÐÔÖµ¿ÉÒÔÉèÖú˺¯Êý£¬Ò²¿ÉÒÔÉèÖÃÆäËû²ÎÊý¡£

ÀýÈ磺ͨ¹ýºËº¯Êý¹À¼ÆCDFµÄ¡£
x = ;
xi = linspace(-10,15,201);
f = ksdensity(x,xi,'function','cdf');
plot(xi,f);

...

x1=[0.095        0.118        0.122        0.04        0.051        0.091        0.095        0.098        0.106        0.122        0.126        0.15        0.2        0.059        0.079        0.106        0.126        0.138        0.02        0.067        0.07        0.087        0.098        0.098        0.102        0.103        0.114        0.118        0.122        0.13        0.146        0.15        0.154];
[f1,x1i] = ksdensity(x1);
plot(x1i,f1) ÕâÑù³öÏÖ¸ºÊý¡£¡£

Ð޸ijÉÕâÑù£º[f1,x1i] = ksdensity(x1,linspace(0,max(x1)),'function','pdf'); ²»»á³öÏÖ¸ºÊýÁË¡£ÕâÑù¶Ôô£¿ºÍÖ±½ÓÓÃksdensityÒ»Ñù£¿ÎÒÓðïÖúÀïÃæµÄÀý×ÓÈ¥Ð޸쬷¢Ïֵõ½µÄ¸ÅÂÊÃܶȺ¯Êýͼ²î±ð»¹ÊÇÂù´óµÄ~~ÏÖÔÚ¾ÍÊÇÏëÈ¥µô¸ºÊý£¬ÉèÖÃpositive£¬Í¼Ðα仯̫´óÁË
12Â¥2015-08-02 23:20:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mygt_hit

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ÒýÓûØÌû:
12Â¥: Originally posted by yoyo0201 at 2015-08-02 23:20:02
x1=;
= ksdensity(x1);
plot(x1i,f1) ÕâÑù³öÏÖ¸ºÊý¡£¡£

Ð޸ijÉÕâÑù£º = ksdensity(x1,linspace(0,max(x1)),'function','pdf'); ²»»á³öÏÖ¸ºÊýÁË¡£ÕâÑù¶Ôô£¿ºÍÖ±½ÓÓÃksdensityÒ»Ñù£¿ÎÒÓðïÖúÀïÃæµÄÀý×ÓÈ¥ÐÞ¸Ä ...

ÎÒÃ÷°×ÄãµÄÒâ˼ÁË¡£ÄãÊÇÏ£Íû°ÑËæ»ú±äÁ¿µÄȡֵ·¶Î§ÏÞÖÆÎªÕýÊý£¬ÎÒÒÔΪÊÇPDF³öÏÖ¸ºÖµÁË¡£
[f1,x1i] = ksdensity(x1,linspace(0,max(x1)),'function','pdf');ÕâÌõÓï¾äÖ»²»¹ýÊǼÆËãÁËÇø¼ä[0, max(x1)]ÉÏ100¸öµÈ·ÖµãµÄPDF£¬µÃµ½µÄPDFµÄ×Ô±äÁ¿£¨Ò²¾ÍÊÇËæ»ú±äÁ¿£©µÄȡֵ·¶Î§ÈÔÔÚÕû¸öʵÊýÖáÉÏ¡£
ÎÒ½¨Òé¸Ä³ÉÕâÑùµÄÓï¾ä£ºÏÞ¶¨È¡Öµ·¶Î§ÎªÕýÊý¡£
[f1,x1i] = ksdensity(x1,'support','positive');   
plot(x1i,f1)
ÖªÆäÈ»£¬ÖªÆäËùÒÔÈ»¡£
13Â¥2015-08-03 18:22:03
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ yoyo0201 µÄÖ÷Ìâ¸üÐÂ
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