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Operation with units xy2pol - Сообщения
Jean,
In your example:
The Magnitude (length) and The Angle (angle) in polar coordinates have different units. The rad is not a common unit. It is not correct.
In my example:
Look again please:

This was solved in recent upgrade by Andrey but apparently remains in the xy2pol.
http://en.smath.info/forum/yaf_postst7552_Units--Operation-cannot-be-performed.aspx
Basile
In your example:
The Magnitude (length) and The Angle (angle) in polar coordinates have different units. The rad is not a common unit. It is not correct.
In my example:
Look again please:
This was solved in recent upgrade by Andrey but apparently remains in the xy2pol.
http://en.smath.info/forum/yaf_postst7552_Units--Operation-cannot-be-performed.aspx
Basile
Better be in harmony wth the maths and Smath.
There is nothing to look gain, Smath is OK.
The Magnitude (length) and The Angle (angle) in polar coordinates have different units.
For sure they have different units: one is in "UnitGraph" the other is in "rad"
The rad is not a common unit. It is not correct.
YES: rad is correct, rad is the maths unit in trig approximations as well as in official tables.
If you want °: convert by appending ° in the Smath result

There is nothing to look gain, Smath is OK.
The Magnitude (length) and The Angle (angle) in polar coordinates have different units.
For sure they have different units: one is in "UnitGraph" the other is in "rad"
The rad is not a common unit. It is not correct.
YES: rad is correct, rad is the maths unit in trig approximations as well as in official tables.
If you want °: convert by appending ° in the Smath result

Jean,
1.
Please go previously and see the picture.
"rad" is the unit for both the magnitude and angle.
There is ONE placeholder for ONE unit.
The Magnitude (length) and The Angle (angle) in polar coordinates have different units.
For sure they have different units: one is in "UnitGraph" the other is in "rad"
The rad is not a common unit. It is not correct.
YES: rad is correct, [YOU JUST SAID THAT ONE IS LENGTH THE OTHER ANGLE!!!] rad is the maths unit in trig approximations as well as in official tables.
If you want °: convert by appending ° in the Smath result
2.
In this specific set of applications I have no interest in "numerical MathEMATICS". I use units. Thank you.
Basile
1.
Please go previously and see the picture.
"rad" is the unit for both the magnitude and angle.
There is ONE placeholder for ONE unit.
The Magnitude (length) and The Angle (angle) in polar coordinates have different units.
For sure they have different units: one is in "UnitGraph" the other is in "rad"
The rad is not a common unit. It is not correct.
YES: rad is correct, [YOU JUST SAID THAT ONE IS LENGTH THE OTHER ANGLE!!!] rad is the maths unit in trig approximations as well as in official tables.
If you want °: convert by appending ° in the Smath result
2.
In this specific set of applications I have no interest in "numerical MathEMATICS". I use units. Thank you.
Basile
Mike,
The xy2pol does not work when units are included:

Do we agree?
When eventually it is working:
The units of the "Magnitude" and the units of the angle, (for the case of complex numbers here), will be different.
Note: I see you got W(att) how?
I see that you have a semicolon ( ; ) I have a comma (,).
Re(S);Im(S) versus Re(S),Im(S)
Basile
The xy2pol does not work when units are included:
Do we agree?
When eventually it is working:
The units of the "Magnitude" and the units of the angle, (for the case of complex numbers here), will be different.
Note: I see you got W(att) how?
I see that you have a semicolon ( ; ) I have a comma (,).
Re(S);Im(S) versus Re(S),Im(S)
Basile
WroteMike,
The xy2pol does not work when units are included:
Do we agree?
Yes we do

ЦитатаWhen eventually it is working:
The units of the "Magnitude" and the units of the angle, (for the case of complex numbers here), will be different.
Yes, that's what I show in my screenshot, that uses ≡ instead of =, just to show the desired result: seeing is better than reading.
ЦитатаNote: I see you got W(att) how?
Now I suppose it's apparent: Ctrl+= and manually make system with desired result

ЦитатаI see that you have a semicolon ( ; ) I have a comma (,).
Re(S);Im(S) versus Re(S),Im(S)
Russian locale default settings

С уважением,
Михаил Каганский
In this specific set of applications I have no interest in "numerical MathEMATICS". [Basile]
From A...Z, Smath is a numerical math tool as any other CAS and including your specific application.
xy2pol result is a vector of two components that need no unit as they are implicit. Extract each
component and append a dead unit decoration for clarity to yourself and the reader.
From A...Z, Smath is a numerical math tool as any other CAS and including your specific application.
xy2pol result is a vector of two components that need no unit as they are implicit. Extract each
component and append a dead unit decoration for clarity to yourself and the reader.
WroteNotice that atan2 ins't in SMath, which is more correct than atan for this functions (see http://www.mathworks.com/help/matlab/ref/atan2.html for example).
atan2.sm (35 КиБ) скачан 155 раз(а).
С уважением,
Михаил Каганский
Hi Mike. I prefer this other, but have some round inconvenients:
Best regards.
Alvaro.
Файл не найден.Файл не найден.
Best regards.
Alvaro.
Файл не найден.Файл не найден.
WroteI guess that with the new try function samebody can make a good one atan2.
But with try, it won't differentiate again.
С уважением,
Михаил Каганский
WroteWroteI guess that with the new try function samebody can make a good one atan2.
But with try, it won't differentiate again.
Oh, I think that this happen only to me :-). Not very sure that try don't accept diff.
So, this with numerical optimization must to be the best solution (until atan2 not be in SMath):
Best regards.
Alvaro.

It's a good option, and only ~30% slower.
С уважением,
Михаил Каганский
Like this Alvaro: look for the Matlb code in the f(x) menu,
look for mwatan2 ... if you have in your version: then go
Jean

Maths atan2.sm (10 КиБ) скачан 149 раз(а).
look for mwatan2 ... if you have in your version: then go
Jean

Maths atan2.sm (10 КиБ) скачан 149 раз(а).
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