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Offline Razonar  
#1 Posted : 19 February 2018 06:34:45(UTC)
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Hi. I'm trying to implement this implicit plot. But can't "cut" the lines in the xy plot. Also, any help about speeding the function is welcome.

Best regards.

Alvaro.

iplot.jpg

iplotq.sm (41kb) downloaded 62 time(s).

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Offline Ber7  
#2 Posted : 19 February 2018 10:35:55(UTC)
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Try the method of Draghilev

DragilevMet.sm (25kb) downloaded 41 time(s).

Edited by user 21 October 2018 20:28:06(UTC)  | Reason: Not specified

Offline Razonar  
#3 Posted : 19 February 2018 12:07:23(UTC)
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Hi Ber. Thanks for the implementation. But it use maple and is semisymbolic, I want just some that can works in the cloud, like: https://en.smath.info/cloud/sheet/s23Pa6bZUn

Best regards.

Alvaro.
Offline Ber7  
#4 Posted : 19 February 2018 12:38:09(UTC)
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Option without Maple

DragilevMet1.sm (22kb) downloaded 39 time(s).
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Offline Razonar  
#5 Posted : 19 February 2018 13:13:37(UTC)
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Perfect! Thanks.

Best regards.

Alvaro
Offline CBG  
#6 Posted : 20 February 2018 01:22:41(UTC)
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Not graphic
It does not show any error

Dragilev_not_plot.png


Best Regards

Carlos
Offline Razonar  
#7 Posted : 20 February 2018 03:28:12(UTC)
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Hi Carlos
For see the error message type B1=


Best regards

Alvaro
Offline CBG  
#8 Posted : 20 February 2018 05:44:57(UTC)
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Hello Alvaro:
Thank you very much.
The error in the graph is that x is not defined.

What causes this error?
In the graphs published by you it is seen that graphs correctly.

Dragilev_Not_Plot_r1.png


Best Regards

Carlos
Offline Razonar  
#9 Posted : 22 February 2018 09:11:16(UTC)
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Hola Carlos. Try the following, a short version, just for n=2.
Best regards.

Alvaro.

DragilevMet2.sm (13kb) downloaded 34 time(s).
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Offline Ber7  
#10 Posted : 22 February 2018 10:21:24(UTC)
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Try also the old version of the Draghilev method
DragilevMet3.sm (24kb) downloaded 27 time(s).
Razonar,thanks for the short code for n = 2

Edited by user 21 October 2018 20:29:28(UTC)  | Reason: Not specified

Offline Jean Giraud  
#11 Posted : 22 February 2018 20:45:42(UTC)
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Carlos, Alvaro,

From previous use of Dragilev method, I observed great difficulties
to appropriately start/stop rkfixed. Your example above works fine as is.
For more points with less tentatives in specific cases, the easiest way
is to pass it to the closed shape Hermite suite.
I should revisit some of those examples.

The Esplina AI2000 interpolates as well for closed shapes.

Spline Esplina [AI2000].sm (22kb) downloaded 21 time(s).

Spline Esplina [Hermite].sm (36kb) downloaded 23 time(s).
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Offline CBG  
#12 Posted : 22 February 2018 21:55:44(UTC)
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By--> Razonar
Quote:
Hola Carlos. Try the following, a short version, just for n=2


By--> Ber7
Quote:
Try also the old version of the Dragilev method
DragilevMet3.sm (24kCool downloaded 10 time(s)


Hola Alvaro, Hello Ber7,

Thanks for your reply, but the DragilevMet2 and 3 files do not work.

The file of Ber 7 does not show any error, but by requiring the value
of B1 and B2, it says that "x" is not defined.


Attached drawing of the errors.


Hello Jean, your files worked perfectly.


DragilevMet2_3_Not_Work.png


Best Regards

Carlos
Offline Razonar  
#13 Posted : 23 February 2018 09:19:44(UTC)
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Hola Carlos.

It's because a problem with rkfixed routine in your environment. Try to download this, or use it in the cloud: DM_RK

Best regards.

Alvaro.

Edited by user 25 February 2018 00:49:18(UTC)  | Reason: Not specified

Offline CBG  
#14 Posted : 23 February 2018 21:56:57(UTC)
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Hola Alvaro:
Gracias por tu respuesta.

Thanks for your answer, but I found the fault.
The interference is caused by the Maxima Plugin,
by disabling it, the file works correctly.


DragilevMet2_3_Works_wt_Maxima.png



Best regards


Carlos
Offline CBG  
#15 Posted : 24 February 2018 05:30:39(UTC)
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Hola Alvaro

Here too, the problem is caused by the decimal separator "Point",

Changing in options, the decimal separator from "Point" to "Comma", (from "." To ","Wink
resolves the problem of graphing


Best regards


Carlos
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