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wuhaiyan1110

Òø³æ (³õÈëÎÄ̳)

[ÇóÖú] matlabÖÐÎÊÌâÇë½Ì

Çë½Ì£¬ÔÚmatlabÖÐÊäÈëÏÂÃæµÄÃüÁî
function bvp4cEx
solinit = bvpinit(linspace(0,1,10),[-1 0]);
sol = bvp4c(@twoode,@twobc,solinit);
x = linspace(0,1);
y = deval_r(sol,x);
plot(x,y(1,,'rp');
hold on;
yAbs=x.^2+4.*x+5;
plot(x,yAbs,'bo');
hold off;
function dydx = twoode(x,y)
  dydx = [ y(2);2*y(2)-y(1)+x^2-1];
  function res = twobc(ya,yb)
       res = [ ya(1)-5; yb(1)-10];
      
      
      
      
     Undefined command/function 'deval_r'
Error in ==> bvp4cEx at 5
y = deval_r(sol,x);

³öÏֵĴíÎóÊÇ'deval_r'䶨Ò壬'deval_r'
ÊÇʲôÒâ˼£¿Ó¦¸ÃÈçºÎ½â¾öÕâ¸öÎÊÌâÄØ£¿

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» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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

yangcenyu

Ìú³æ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

y = deval_r(sol,x);Ó¦¸ÃÊÇy = deval(sol,x);°É
3Â¥2013-03-18 10:28:03
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 7 ¸ö»Ø´ð

154696523

½ð³æ (ÖøÃûдÊÖ)

ÕýÄÜÁ¿Ê¹Õß

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ÊDz»ÊÇÕâÑù£¿
y = deval_r(sol,sol.x);
Positive energy makes life better
2Â¥2013-03-18 10:26:34
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wuhaiyan1110

Òø³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
3Â¥: Originally posted by yangcenyu at 2013-03-18 10:28:03
y = deval_r(sol,x);Ó¦¸ÃÊÇy = deval(sol,x);°É

ÊÔÁË£¬²»ÐС£ÄãÖªµÀÕâ¸ödevalÊÇʲôÂð£¿
4Â¥2013-03-18 11:19:19
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wuhaiyan1110

Òø³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
2Â¥: Originally posted by 154696523 at 2013-03-18 10:26:34
ÊDz»ÊÇÕâÑù£¿
y = deval_r(sol,sol.x);

´íÎóÊÇ˵£¬ÎÒûÓж¨Òådeval£¬¸úд·¨¹ØÏµ²»´ó°É£¬Ö÷ÒªÊÇÏëÖªµÀÔõô¶ÔËü¶¨Ò壬Èç¹ûËûÊÇÒ»¸öËã·ûµÄ»°£¬ÊǶÔÀ¨ºÅÄÚµÄÄÚÈݽøÐÐʲô²Ù×÷£¬²»ÖªµÀËûµ½µ×ÊÇʲôÒâË¼ÄØ£¿ÄúÖªµÀdevalÊÇʲôÒâ˼ô£¿
5Â¥2013-03-18 11:22:18
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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