MIT6_094IAP10_lec02

Colbie

MIT6_094IAP10_lec02

8 U* |0 t3 c! c) u! ~1 f% A2 W! z• How long did it take to do required problems?
- f# {( F3 I* Q2 ~+ y4 a, Z• Did anyone do optional problems?
$ B5 e0 g' K6 T! o+ J0 X9 `• Was level of guidance appropriate?
; p: ^2 E# z2 \" L& \/ D# K• Unanswered Questions?
6 I! _  X; P' q4 l( l' U9 O* P, F• Some things that came up:
( T/ h, \0 `7 d" @• Use of semicolon – never required if one command per line.
You can also put multiple commands on one line; in this case a semicolon is necessary to separate commands:
» x=1:10; y=(x-5).^2; plot(x,y);
, }& Z4 ~2 N/ M" M3 F( N• Assignment using indices – remember that you can index into matrices to either look up values or to assign value:
, c9 ?2 ]5 ]  G» x=rand(50,1); inds=find(x<0.1); y=x(inds);
x(inds)=-x(inds); x(inds)=3;
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busahuang

看看什么好东东。