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[ÇóÖú] MatlabϰÌâÇó½â ÒÑÓÐ1È˲ÎÓë

СµÜ²»²Å£¬MatlabµÄ³ÌÐò´úÂë³öÏÖÎÊÌ⣬Çó´óÉñ¸ø³ö´úÂëÄ£°å»òÕß´ËÌâ³ÌÐò´úÂë¡£ÆÚÄ©ÊÔÌâ°¡£¬Çó¸øÁ¦£¡¸Ð¼¤ÌéÁ㣡
ÒÑ֪ˮÔÚ²»Í¬Î¶ÈϵÄÃܶÈÈçϱíËùʾ,ÇëÓÃÒ»ÔªÈýµãÀ­¸ñÀÊÈÕ²åÖµ·¨¼ÆËãË®ÔÚ12,33ºÍ66¡æÊ±µÄÃܶȡ£
T£¨¡æ£©           0          20          40          60          80         100
¦Ñ£¨kg/m3£©999.9        998.2        992.2        983.2        971.8        958.4
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ÑîÐÒÓö: ½ð±Ò+15, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-05-28 08:55:07
CODE:
function Lag_interp
clear all;clc
Ti=[12 33 66];
T=[ 0          20          40          60          80         100];
p=[999.9        998.2        992.2        983.2        971.8        958.4];

for i=1:length(Ti);
    p_answer(i)=polyinterp(T,p,Ti(i));
end
Result=[Ti' p_answer']
   


function v=polyinterp(x,y,u)
n=length(x);
v=zeros(size(u));
for k=1:n;
    w=ones(size(u));
    for j=[1:k-1 k+1:n];
        w=(u-x(j))./(x(k)-x(j)).*w;
    end
v=v+w*y(k);
end

¼ÆËã½á¹û£º

Result =

   12.0000  999.5037
   33.0000  994.6881
   66.0000  980.0144
MATLAB¡¢MSСÎÊÌâ¡¢ÆÕͨÎÊÌâÇë·¢ÌûÇóÖú£¡Ê±¼ä¾«Á¦ÓÐÏÞ£¬Ë¡²»½ÓÊÜÎÞ³¥Ë½ÐÅÇóÖú¡£
2Â¥2014-05-27 18:33:19
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÑîÐÒÓö

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by ÔÂÖ»À¶ at 2014-05-27 18:33:19
function Lag_interp
clear all;clc
Ti=;
T=;
p=;

for i=1:length(Ti);
    p_answer(i)=polyinterp(T,p,Ti(i));
end
Result=
   


function v=polyinterp(x,y,u)
n=length(x);
v=zeros(size(u)) ...

Íò·Ö¸Ðл£¡½ð±ÒËÍÉÏ£¡

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

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3Â¥2014-05-28 08:54:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÑîÐÒÓö

½ð³æ (СÓÐÃûÆø)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
3Â¥: Originally posted by ÑîÐÒÓö at 2014-05-28 08:54:54
Íò·Ö¸Ðл£¡½ð±ÒËÍÉÏ£¡...

´óÉñ ÎÒ¿É·ñÔÙÎÊÄãÒ»µÀÌâ°¡£¬ÊµÔÚÊǶÔMATLAB±à³ÌÎ޸У¬Ö»ÎªÍê³É×÷Òµ¡£
³á°òµÄºÛ¼£
4Â¥2014-05-28 16:07:21
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