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ÊÇÕâ¸öÒâ˼²»£¿ close all;clear;clc; hold on; rand('state',18); x=rand(5,3);x=sort(x);x(3, =x(3, +0.3;y=rand(5,3);y=sort(y);y(3, =y(3, -0.2;for k=1:5; fill(x(k, ,y(k, ,'y');end |
2Â¥2010-05-05 14:19:35
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3Â¥2010-05-05 14:44:20
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5Â¥2010-05-05 15:11:40
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6Â¥2010-05-05 15:18:57
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adu886886(½ð±Ò+2):ллӦÖú 2010-05-05 16:36:17
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ÒÔÏÂΪ°ïÖúÎļþÖеÄ˵Ã÷£º RAND Uniformly distributed random numbers. ±ê×¼»¯·Ö²¼µÄËæ»úÊý RAND(N) is an N-by-N matrix with random entries, chosen from a uniform distribution on the interval (0.0,1.0). rand(N)ÎªËæ»úÉú³ÉÒ»¸öÔÚ¡¾0£¬1¡¿Ö®¼äµÄnÎ¬Ëæ»ú¾ØÕó¡£ RAND(M,N) and RAND([M,N]) are M-by-N matrices with random entries.Ëæ»úÉú³ÉÒ»¸öÔÚ¡¾0£¬1¡¿Ö®¼äµÄm£¬nÎ¬Ëæ»ú¾ØÕó¡£ RAND(M,N,P,...) or RAND([M,N,P,...]) generate random arrays. RAND with no arguments is a scalar whose value changes each time it is referenced. RAND(SIZE(A)) is the same size as A. RAND produces pseudo-random numbers. The sequence of numbers generated is determined by the state of the generator. Since MATLAB resets the state at start-up, the sequence of numbers generated will be the same unless the state is changed. matlabµÄËæ»úÊýËã·¨ÊÇͨ¹ýÒ»¸ö¡°ÖÖ×Ó¡±µÝÍÆ³öÀ´µÄ£¬ ÖÖ×ÓÔÚ³ÌÐò³õʼµÄʱºò¶¼Ò»Ñù¡£ S = RAND('state') is a 35-element vector containing the current state of the uniform generator. RAND('state',S) resets the state to S. RAND('state',0) resets the generator to its initial state. ÖØÐ»ָ´³õʼ״̬£¬¸ÕÔËÐÐmatlabʱºòµÄ״̬ RAND('state',J), for integer J, resets the generator to its J-th state. °²ÅÅÖÖ×Ó²úÉúµÚj¸ö״̬ RAND('state',sum(100*clock)) resets it to a different state each time.¸ù¾Ýʱ¼ä²úÉú²»Í¬µÄËæ»úÊý |

7Â¥2010-05-05 16:22:43














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