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From: | Ozzy Lash |
Subject: | Re: loops vs vectorization |
Date: | Wed, 5 Jul 2006 18:20:40 -0500 |
On 7/5/06, Robert A.Macy <address@hidden> wrote:
Would somebody be kind enough to refresh my memory how to avoid a "for" loop when there are a lot of conditional adjustments going on? for example, the simple act of replacing every item that is less than negative with the value zero. Can't remember all the nuances on writing 'vectorized' versions of those types of conversions. - Robert - _______________________________________________ Help-octave mailing list address@hidden https://www.cae.wisc.edu/mailman/listinfo/help-octave
One way to do what you ask is: octave:6> A=rand(5)-0.5 A = 0.172279 0.035958 0.236123 0.472645 0.278473 -0.143212 -0.459838 0.450752 0.460015 -0.332292 0.126755 -0.047737 0.044301 0.338564 -0.118386 -0.245099 -0.466291 -0.498579 0.164236 -0.155360 -0.252265 0.239568 -0.298967 0.435878 -0.153951 octave:7> A(A<0)=0 A = 0.17228 0.03596 0.23612 0.47265 0.27847 0.00000 0.00000 0.45075 0.46002 0.00000 0.12675 0.00000 0.04430 0.33856 0.00000 0.00000 0.00000 0.00000 0.16424 0.00000 0.00000 0.23957 0.00000 0.43588 0.00000 octave:8>
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