MIT6_094IAP10_lec02

Colbie

MIT6_094IAP10_lec02

• How long did it take to do required problems?
) N: C- ^  X; a4 Y" i# @1 ?- |• Did anyone do optional problems?
• Was level of guidance appropriate?
• Unanswered Questions?
• Some things that came up:
" Y( o/ k! U6 t, I• Use of semicolon – never required if one command per line.
0 B: _! _+ S$ {6 `. ^* |: }8 P/ ~+ H$ [You can also put multiple commands on one line; in this case a semicolon is necessary to separate commands:
: M6 [4 T8 z& L8 x0 I1 z6 o» x=1:10; y=(x-5).^2; plot(x,y);
• Assignment using indices – remember that you can index into matrices to either look up values or to assign value:
8 g) Z- q0 z- ]" [0 ^» 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。