MIT6_094IAP10_lec02

Colbie

MIT6_094IAP10_lec02
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  T  X* H3 f, S# U" {8 B7 K; E! [7 c• How long did it take to do required problems?
1 L, t3 Y. d0 A, E0 b• Did anyone do optional problems?
• Was level of guidance appropriate?
# n1 C; u6 \/ v9 F7 x• Unanswered Questions?
" k. r- C( x3 y0 ?2 P. C1 a" o* J• Some things that came up:
9 C; Z+ G0 v' Y0 `) V• 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:
  r/ T! S) i6 ~» x=1:10; y=(x-5).^2; plot(x,y);
! M4 _. X0 z2 A1 N3 r• Assignment using indices – remember that you can index into matrices to either look up values or to assign value:
» x=rand(50,1); inds=find(x<0.1); y=x(inds);
x(inds)=-x(inds); x(inds)=3;
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busahuang

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