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Missing bracket in display of complex numbers with changed units
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See attachment Edited by user 23 March 2014 14:41:23(UTC)
| Reason: Not specified File Attachment(s): mkraska attached the following image(s): |
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I do not know if this missing brackets is connected to the behavior already mentioned many times by me. It still remained unsolved. Look at video please. Again, the brackets are missing in the display. Brackets problem and range()By looking at the actual commands, I do not know if there is something that could be done c: range(1,10)*'m g: (range(1,10))*'m In the case of comple numbers, the brackets just disappear when inserting another unit Brackets disappear in complex z: (5+6*i)*'m z=(5+6*i)*'m z=500+600*i@'cm z=500+600*i@'cm Regards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Symbolic evaluation seems to work. Although brackets should be kept in all cases. kilele attached the following image(s):
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The problem seems to apply to any operator representation of internal functions, if that operator has no bracketing visual structure (i.e. has placeholders without wrapping structure). Internally, complex numbers, ranges, sums and the like, are represented by a function or object which does not require brackets around it. However, the cartesian representation for complex number is Re + Im i, that is + operation, as well as in sums. In ranges, the internal operator is just side by side putting of numbers, with undefined precedence perhaps somewhere below multiply. mkraska attached the following image(s): |
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Originally Posted by: kilele  Symbolic evaluation seems to work. That was just by chance. The problem persists for symbolic optimization as well. mkraska attached the following image(s): |
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 Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,647  Location: Italy Was thanked: 1329 time(s) in 875 post(s)
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Mhhh.. I don't understand what is the problem about units and imaginary numbers...  What's the expected result? Davide Carpi attached the following image(s): |
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The problem is that the visual representation suggests that P is a sum of dimensionless number 300 and dimensioned imaginary 100*I centimeters (i.e. unitless number is added to a length). Surely, this is only a visual artifact, and internally the program keeps record that the unit (cm) is applied to the whole number (300+100*i), but this is yet another place where the visual representation is plain wrong. |
Best regards,
Mike Kaganski |
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Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,647 Location: Italy Was thanked: 1329 time(s) in 875 post(s)
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Originally Posted by: mikekaganski The problem is that the visual representation suggests that P is a sum of dimensionless number 300 and dimensioned imaginary 100*I centimeters (i.e. unitless number is added to a length). Surely, this is only a visual artifact, and internally the program keeps record that the unit (cm) is applied to the whole number (300+100*i), but this is yet another place where the visual representation is plain wrong. Thank you, now I understand the point  |
If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects |
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Missing bracket in display of complex numbers with changed units
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