conditioning array with complex number

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JK
JK le 14 Sep 2021
Commenté : Star Strider le 14 Sep 2021
I would like to apply a condition to make certain complex numbers to zero.
condition: if complex number * conj(complex number) is less than 0.5, set complex number to zero.
I tried A(A.*conj(A)<0.5)=0. it didn't work out.

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Star Strider
Star Strider le 14 Sep 2021
Ran in:
This can probably be combined into fewer actual lines. I kept them separate to demonstrate the approach —
A = complex(rand(10),rand(10))
A =
0.3470 + 0.8859i 0.0137 + 0.7639i 0.1015 + 0.7223i 0.5190 + 0.9946i 0.2642 + 0.9262i 0.1227 + 0.4625i 0.5610 + 0.0151i 0.9365 + 0.1072i 0.9752 + 0.7804i 0.8272 + 0.9432i 0.4636 + 0.2904i 0.1338 + 0.2256i 0.3974 + 0.6367i 0.9876 + 0.3169i 0.2435 + 0.0412i 0.3481 + 0.5287i 0.9613 + 0.8060i 0.3516 + 0.6644i 0.7104 + 0.0387i 0.1082 + 0.4680i 0.0129 + 0.6059i 0.0952 + 0.5557i 0.5719 + 0.9788i 0.2254 + 0.7534i 0.8180 + 0.1280i 0.5472 + 0.2541i 0.8326 + 0.8705i 0.0095 + 0.3066i 0.3927 + 0.4640i 0.7428 + 0.6265i 0.7454 + 0.4747i 0.4278 + 0.9148i 0.8096 + 0.6022i 0.7720 + 0.5985i 0.2754 + 0.3324i 0.9874 + 0.6228i 0.5922 + 0.1384i 0.9802 + 0.0692i 0.6346 + 0.6318i 0.1758 + 0.3041i 0.6405 + 0.2935i 0.5829 + 0.1763i 0.2208 + 0.8402i 0.5265 + 0.3813i 0.8351 + 0.2082i 0.9958 + 0.7694i 0.3690 + 0.7676i 0.6434 + 0.2222i 0.0020 + 0.1934i 0.6156 + 0.8573i 0.0943 + 0.9701i 0.3803 + 0.4209i 0.1179 + 0.9497i 0.9916 + 0.6548i 0.2876 + 0.1710i 0.0866 + 0.8797i 0.3089 + 0.4247i 0.3803 + 0.3770i 0.7961 + 0.3813i 0.2586 + 0.0791i 0.5874 + 0.2785i 0.2163 + 0.3044i 0.2791 + 0.4933i 0.2559 + 0.8200i 0.8186 + 0.4434i 0.2505 + 0.6017i 0.5400 + 0.9447i 0.1880 + 0.5847i 0.6254 + 0.6406i 0.3905 + 0.6088i 0.3084 + 0.0559i 0.5232 + 0.9541i 0.1421 + 0.3563i 0.6262 + 0.1674i 0.8474 + 0.7592i 0.1504 + 0.9597i 0.8628 + 0.9455i 0.9468 + 0.2465i 0.5404 + 0.7113i 0.6113 + 0.0233i 0.2909 + 0.3973i 0.9900 + 0.4806i 0.3832 + 0.9495i 0.3579 + 0.1691i 0.1201 + 0.1768i 0.3424 + 0.0581i 0.0161 + 0.4895i 0.9649 + 0.5228i 0.0355 + 0.1678i 0.8364 + 0.5422i 0.1649 + 0.9458i 0.4645 + 0.4179i 0.3430 + 0.6006i 0.5904 + 0.2400i 0.2482 + 0.3173i 0.3150 + 0.9556i 0.7045 + 0.5468i 0.8496 + 0.4076i 0.4556 + 0.8503i 0.0623 + 0.0865i
A2 = A.*conj(A)
A2 = 10×10
0.9052 0.5838 0.5320 1.2586 0.9276 0.2290 0.3150 0.8886 1.5600 1.5739 0.2992 0.0688 0.5634 1.0759 0.0610 0.4007 1.5737 0.5651 0.5061 0.2308 0.3672 0.3178 1.2851 0.6184 0.6855 0.3640 1.4510 0.0941 0.3695 0.9442 0.7809 1.0198 1.0182 0.9541 0.1864 1.3628 0.3699 0.9656 0.8019 0.1234 0.4964 0.3708 0.7546 0.4226 0.7408 1.5837 0.7253 0.4634 0.0374 1.1140 0.9499 0.3218 0.9158 1.4120 0.1120 0.7814 0.2758 0.2868 0.7791 0.0731 0.4225 0.1395 0.3212 0.7379 0.8667 0.4248 1.1840 0.3773 0.8014 0.5231 0.0983 1.1840 0.1471 0.4201 1.2945 0.9436 1.6383 0.9573 0.7979 0.3742 0.2425 1.2111 1.0484 0.1567 0.0457 0.1206 0.2399 1.2044 0.0294 0.9935 0.9217 0.3904 0.4783 0.4062 0.1622 1.0124 0.7954 0.8880 0.9305 0.0114
idx = A2 < 0.5
idx = 10×10 logical array
0 0 0 0 0 1 1 0 0 0 1 1 0 0 1 1 0 0 0 1 1 1 0 0 0 1 0 1 1 0 0 0 0 0 1 0 1 0 0 1 1 1 0 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 1 1 1 1 0 0 1 0 1 0 0 1 0 1 1 0 0 0 0 0 1 1 0 0 1 1 1 1 0 1 0 0 1 1 1 1 0 0 0 0 1
A(idx) = 0
A =
0.3470 + 0.8859i 0.0137 + 0.7639i 0.1015 + 0.7223i 0.5190 + 0.9946i 0.2642 + 0.9262i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.9365 + 0.1072i 0.9752 + 0.7804i 0.8272 + 0.9432i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.3974 + 0.6367i 0.9876 + 0.3169i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.9613 + 0.8060i 0.3516 + 0.6644i 0.7104 + 0.0387i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.5719 + 0.9788i 0.2254 + 0.7534i 0.8180 + 0.1280i 0.0000 + 0.0000i 0.8326 + 0.8705i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.7428 + 0.6265i 0.7454 + 0.4747i 0.4278 + 0.9148i 0.8096 + 0.6022i 0.7720 + 0.5985i 0.0000 + 0.0000i 0.9874 + 0.6228i 0.0000 + 0.0000i 0.9802 + 0.0692i 0.6346 + 0.6318i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.2208 + 0.8402i 0.0000 + 0.0000i 0.8351 + 0.2082i 0.9958 + 0.7694i 0.3690 + 0.7676i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.6156 + 0.8573i 0.0943 + 0.9701i 0.0000 + 0.0000i 0.1179 + 0.9497i 0.9916 + 0.6548i 0.0000 + 0.0000i 0.0866 + 0.8797i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.7961 + 0.3813i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.2559 + 0.8200i 0.8186 + 0.4434i 0.0000 + 0.0000i 0.5400 + 0.9447i 0.0000 + 0.0000i 0.6254 + 0.6406i 0.3905 + 0.6088i 0.0000 + 0.0000i 0.5232 + 0.9541i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.8474 + 0.7592i 0.1504 + 0.9597i 0.8628 + 0.9455i 0.9468 + 0.2465i 0.5404 + 0.7113i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.9900 + 0.4806i 0.3832 + 0.9495i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.9649 + 0.5228i 0.0000 + 0.0000i 0.8364 + 0.5422i 0.1649 + 0.9458i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.0000 + 0.0000i 0.3150 + 0.9556i 0.7045 + 0.5468i 0.8496 + 0.4076i 0.4556 + 0.8503i 0.0000 + 0.0000i
Experiment to get different results.
.
  2 commentaires
JK
JK le 14 Sep 2021
thanks, it is working well.
Star Strider
Star Strider le 14 Sep 2021
My pleasure!
If my Answer helped you solve your problem, please Accept it!
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