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rbaior
USA
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 Posted - 04/14/2004 : 3:36:57 PM
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Hi there,
Can I plot 3D plots from equations rather than from worksheet so it obviates the need to generate the discrete points on my part?
Regards,
Rob |
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Mike
USA
357 Posts |
Posted - 04/14/2004 : 4:25:05 PM
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Hi Rob,
Yes, you can do that using the Set Matrix Values dialog box. To open this dialog:
1. Open a fresh matrix window (click the New Matrix button on the Standard toolbar).
2. From the menu, select Matrix:Set Values.
=> This opens the Set Matrix Values dialog box.
3. Enter matrix dimensions and your equation here.
Mike
OriginLab |
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rbaior
USA
Posts |
Posted - 04/16/2004 : 10:48:42 PM
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Hi there,
I did try what you suggested. But how can I plot a function whose ranges are not just [1:N], but rather [0.1 to 0.5] for example? I can scale the index up but when I did that it left a whole bunch empty entries in the matrix window, so when i tried to plot, it didn't work correctly. do you what I mean?
Thanks,
Rob |
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easwar
USA
1965 Posts |
Posted - 04/17/2004 : 10:58:31 PM
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Hi Rob,
The Origin matrix window can be assigned a dimension (number of rows and columns), and also coordinates (start and end values along x and y). Based on these two entries, the x, y values for each cell is computed. You can do this assignment using the Matrix->Set Dimension dialog.
Once dimension and coordinates are assigned, use the
Matrix->Set Column dialog. You can then enter formulae such as
Cell(i,j) = sin(x)*cos(y)
which will then use the x, y values for each cell in the computation.
On the other hand, if you enter a formula such as
Cell(i,j)=i*j
then the row/column position values are used instead of the actual x, y values for that cell.
If you have ver 7 or higher, when you view the Matrix in Data mode, you can toggle between showing the row/column numbers versus the x/y numbers using the menu View->Show Col/Row or View->Show X/Y
Hope this helps.
Easwar
OriginLab
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3D Plots from Equations