Matrix 2D plot -unhandled exception

#1 Опубликовано: 29.04.2021 11:42:53

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Hi

SMath throws an exception when I plot a matric containing a large number (such as 3.1*10^8) - any ideas what I'm doing wrong?

Many thanks

John

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Andrey Ivashov 02.05.2021 10:54:00

#2 Опубликовано: 29.04.2021 16:19:57

Jean Giraud

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SMath throws an exception when I plot a matric containing a large number (such as 3.1*10^8) - any ideas what I'm doing wrong?

The quick plot plots on canvas pixels
The first abscissa @ 1, 2nd @ 2
The third one @ roughly 100 km at right.
At that distance, they don't shake hands !

#3 Опубликовано: 29.04.2021 18:56:54

overlord

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Wrote
Hi

SMath throws an exception when I plot a matric containing a large number (such as 3.1*10^8) - any ideas what I'm doing wrong?

Many thanks

John

Below there you can find the file. You didn't do anything wrong. I guess this is a bug.
Plot can show the results, but give a bug and force crash if you don't do it right way.
If you insert the 2d plot, add the variable and try to scroll it right after smath crashes.
Maybe during scrolling plot can't do the refreshing, hit a wall and quit I don't know.
Well, right way is a work around actually since this is a bug. NOT the way "you have to do this like this always".

I did altered 3x10^8 to 3x10^4 then scrolled to see the graphic better.
Then altered it again to 3x10^5 and scrolled again. Gradually revising number and scrolling made it to 3x10^8.
Plot is changing correctly after this phase. Tried with couple of them and not crashed.

Regards

ploterror.sm (9 КиБ) скачан 64 раз(а).

#4 Опубликовано: 29.04.2021 21:29:44

Jean Giraud

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#5 Опубликовано: 30.04.2021 04:43:34

Davide Carpi

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Bug confirmed, it is about coordinates in mouse events.

bug.sm (2 КиБ) скачан 63 раз(а).

************** Text of Exception **************
System.OverflowException: Value too large or too small for an Int32.
   in System.Convert.ToInt32(Double value)
   in ..(Int32 , Int32 )
   in SMath.Controls.Renderer.Refresh()
   in SMath.Controls.Renderer.OnMouseMove(MouseEventOptions e)
   in SMath.Controls.RegionHolder`1.OnMouseMove(MouseEventOptions e)
   in SMath.Controls.Worksheet.MouseMove(MouseEventOptions e)
   in SMath.Controls.InteractiveWorksheet.MouseMove(Single x, Single y, Int32 count)
   in SMath.UI.Desktop.DesktopWorksheet.(MouseEventArgs )
   in System.Windows.Forms.Control.WmMouseMove(Message& m)
   in System.Windows.Forms.Control.WndProc(Message& m)
   in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

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sergio 30.04.2021 13:50:00

#6 Опубликовано: 30.04.2021 15:45:30

Jean Giraud

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SMath throws an exception when I plot a matrix containing a large number (such as 3.1*10^8) -
any ideas what I'm doing wrong ?

I notice in my early SS 5346 [2015]
Simply, before you plot,
set either X or Y close to max of either X/Y as applicable
That clears the mouse incompatibility from initial default plot.
You may encounter that in plotting ordinary f(x).
The X_Y plot will surely crash Smath.