MIT6_094IAP10_lec02

Colbie

MIT6_094IAP10_lec02

1 Z" k' d, F5 `1 Y& H; {• How long did it take to do required problems?
9 \- Z. i: |$ y( F0 x! [$ m9 z& g/ N6 b• Did anyone do optional problems?
• Was level of guidance appropriate?
! y6 E2 v6 z1 W+ ?" F8 @• Unanswered Questions?
• Some things that came up:
7 t1 w( @. K0 M9 u8 U6 P• 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:
6 I% X9 I: V2 D* U4 |  f* }% A8 l4 w» 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:
5 j5 w7 T' u+ w» x=rand(50,1); inds=find(x<0.1); y=x(inds);
x(inds)=-x(inds); x(inds)=3;

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