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Old   August 23, 2013, 04:12
Default 2 datas on one plot
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Hello!

I need some help with paraiew.
I calculated my task with 2 different boundary conditions and now I need to display my results on plot. I have 2D task. At 1 step I create plane and then use "Plot Data". But it works only for one task.
Is it possible to display results of my 2 task on one plot? If so, it would be more easy to see difference.
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Old   August 24, 2013, 13:08
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Greetings Arina,

Attached is an example that shows:
  1. On the right is the plot with 4 lines, 2 of each plot.
  2. On the top left is the "Pipeline Browser" that has the 2 plot filters that are shown on the right. Notice that both have the eye icon turned on.
  3. On the bottom left on the "Object Inspector" is shown where you can configure the lines.
Best regards,
Bruno
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File Type: jpg Screenshot from 2013-08-24 18:03:35.jpg (49.1 KB, 133 views)
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Old   August 31, 2013, 17:16
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Hi dear Bruno
I got this error:
Code:
ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/IO/vtkOpenFOAMReader.cxx, line 6481
vtkOpenFOAMReaderPrivate (0x24370e0): Error reading line 19 of /home/ehsan/Desktop/WR_inviscid/0/T: Expected number, string or (, found Temperature


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/IO/vtkOpenFOAMReader.cxx, line 6481
vtkOpenFOAMReaderPrivate (0x24370e0): Error reading line 19 of /home/ehsan/Desktop/WR_inviscid/0/U: Expected number, string or (, found Velocity


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/IO/vtkOpenFOAMReader.cxx, line 6481
vtkOpenFOAMReaderPrivate (0x24370e0): Error reading line 19 of /home/ehsan/Desktop/WR_inviscid/0/p: Expected number, string or (, found Pressure


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0xa755c70): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0xa755a90): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x89a1560): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x89a13d0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0xc8b6e90): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0xc8b6cb0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0xc8bfdd0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0xc8bfca0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x9ef88e0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x9ef8540): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x9f02ab0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x9f02980): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x9f05150): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x9f05020): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x9f0d800): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x9f0d640): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x67cc220): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x67cc720): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2ab1690): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2ab1560): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x9ef1980): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2ab21f0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2ae3920): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2ae37f0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2adec80): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2adeb50): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x67d78e0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x67d2a10): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x67da140): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x67da010): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x67df740): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2ae6680): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2af7950): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2aea820): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2afe230): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x2afe0d0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x2af9b90): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x67e8840): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x7a95140): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x7a94fb0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x7a97550): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x7a97320): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x7a99c80): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x7a99af0): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x7a9c3f0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x7a9c260): No X column is set (index 0).


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Filtering/vtkAlgorithm.cxx, line 553
vtkContextMapper2D (0x7a9e4a0): Attempt to get point or cell data from a data object


ERROR: In /home/opencfd/OpenFOAM/ThirdParty-dev/ParaView-3.12.0/VTK/Charts/vtkPlotPoints.cxx, line 635
vtkPlotLine (0x7a966b0): No X column is set (index 0).
and I don't get two graphs in two different times,both two times becomes the same when I change each one!
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Old   August 31, 2013, 17:44
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Hi Ehsan,

A snapshot of what you're seeing in the "Display" tab would help understand what you configured wrong.


In addition, you want to see data from different times? You didn't mention that on the other thread... I haven't tested this, but it might work:
  1. Once you have the plot data for one time instance, you can save it with the "File -> Save Data" option and save it as VTK.
  2. Then skip to the other time instance and save that one as well.
  3. Open another ParaView and load the two files you saved.
  4. (edit: ) For each loaded VTK file, apply the filter "Plot Data" to each one, so that each 3D line that was saved in the VTK files, will be plotted in the graph.
Best regards,
Bruno


edit: If using OpenFOAM to generated the results that are shown in ParaView, then see this post: How to visualize the difference of fields btween two simulation post #20

Last edited by wyldckat; September 1, 2013 at 09:18. Reason: see "edit:" and (edit: )
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Old   September 1, 2013, 06:00
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Code:
Greetings Arina,

Attached is an example that shows:
On the right is the plot with 4 lines, 2 of each plot.
On the top left is the "Pipeline Browser" that has the 2 plot filters that are shown on the right. Notice that both have the eye icon turned on.
On the bottom left on the "Object Inspector" is shown where you can configure the lines.
Best regards,
Bruno
Hi Bruno
yes I want to have graphs of two different times of one field,whats the other scenario?I mean how you have created the attached figure? if there are in one time all graphs should coincide together and make only one graph,and I don't know how you have obtained two p field and two U field only in one snapshot?
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Old   September 1, 2013, 06:08
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Hi Ehsan,

Quote:
Originally Posted by immortality View Post
if there are in one time all graphs should coincide together and make only one graph,and I don't know how you have obtained two p field and two U field only in one snapshot?
The snapshot clearly shows that there are 2 plot filters being used and shown in the same plot representation! It's two "Plot over line" filters that were used for 2 different 3D lines for the same time instance.


And as discussed at the following post: How to visualize the difference of fields btween two simulation post #20 - on OpenFOAM, the easiest is to copy the field from one time snapshot to the next one, so that you can compare the values from 2 time snapshots.

Best regards,
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Old   September 1, 2013, 06:21
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I didn't check mark the "write all timesteps..." is it true?
but when I open .vtk files nothing is shown in paraView.
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Old   September 1, 2013, 07:03
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Quote:
Originally Posted by immortality View Post
I didn't check mark the "write all timesteps..." is it true?
but when I open .vtk files nothing is shown in paraView.
  • Writing all time steps might make it easier for you to have all of the lines for all time steps. This way you don't need to save each one individually. The problem is that the saved VTK files do not preserve the indication of the time which they are meant for, so it can get a bit disorienting.
  • The VTK file saved from a "Plot over Line" is only the line. To plot these lines from the VTK files back to the chart, use the filter "Plot Data".
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Old   September 1, 2013, 08:56
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Hi Bruno
I only want to plot 3-4 figures that show the run data is almost the same in two sequential last cycles.each cycle period lasts about .001s and I want to plot some fields in present(the last)cycle and previous cycle.
how can use plot over line for seeing saved vtk's?
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Old   September 1, 2013, 09:19
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Read post #4, because I've updated it.
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Old   September 1, 2013, 09:51
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second figure can't be loaded
it was hard to upload these due to internet speed!
Attached Images
File Type: jpg Screenshot at 2013-09-01 14:43:52.jpg (56.3 KB, 23 views)
File Type: jpg Screenshot at 2013-09-01 18:15:56.jpg (54.7 KB, 21 views)
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Old   September 1, 2013, 10:36
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Bruno the second graph is not opened in the first figure,
this way is better than subtracting fields due to those little points with high values I posted in How to visualize the difference of fields btween two simulation.
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Old   September 1, 2013, 10:38
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According to the images you've attached, the second one clearly shows that you mistakenly saved the second second graphic as PNG, instead of VTK
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Old   September 1, 2013, 11:02
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thanks,they plot correctly now,a question,I have saved them by p Field only but there are other fields too when I open them,is it true according to vtk properties?
Attached Images
File Type: jpg p.jpg (31.2 KB, 9 views)
File Type: jpg Screenshot at 2013-09-01 19:21:14.jpg (58.4 KB, 10 views)
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Old   September 1, 2013, 11:08
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and another thing is that when I open paraview,two panels open,with or without -builtin what may be the cause?
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File Type: jpg Screenshot at 2013-09-01 20:22:40.jpg (46.3 KB, 8 views)
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Old   September 1, 2013, 12:34
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can change the names of fields on graphs and add aome explanations to them on the graph too?
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Old   September 1, 2013, 13:21
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Quote:
Originally Posted by immortality View Post
thanks,they plot correctly now,a question,I have saved them by p Field only but there are other fields too when I open them,is it true according to vtk properties?
The "Save Data" option from the "File" menu should save all of the requested data from the selected items. Therefore, yes, that's normal that it saves values from all fields present in those lines.

Quote:
Originally Posted by immortality View Post
and another thing is that when I open paraview,two panels open,with or without -builtin what may be the cause?
That's a bit strange.... I guess that ParaView saved this in its "ParaView.ini" file. If you close the second one and safely close ParaView, it should save the current window settings into the ini file.

Quote:
Originally Posted by immortality View Post
can change the names of fields on graphs and add aome explanations to them on the graph too?
Renaming fields... no. But, for example, you can use the "Calculator" filter to calculate that "U" is "Velocity"
As for annotations on the plot... you can't add loose annotations, but you can add titles to the axis and figure, as shown in the attached image.
Attached Images
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Old   September 1, 2013, 15:29
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thanks for explanations.but isn't there a quicker approach without saving each plot and close the paraview,again open it and open two plots and delete exess fields?
-------------
and how use calculator(in which branch in pipeline browser it have to be?)
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Old   September 1, 2013, 17:05
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Quote:
Originally Posted by immortality View Post
thanks for explanations.but isn't there a quicker approach without saving each plot and close the paraview,again open it and open two plots and delete exess fields?
The only way that I can think of would require considerable hacking into the "PV3FoamReader" plug-in for ParaView.
This is because ParaView uses only a single time line and it does not have a filter that can offset the time at which a particular dataset is in.

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Originally Posted by immortality View Post
and how use calculator(in which branch in pipeline browser it have to be?)
It's simple: do some trial-and-error until you can figure it out .
That's how I learned .
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It's simple: do some trial-and-error until you can figure it out .
That's how I learned .
Bruno I know how to work with Calculator but don't understand the way you suggest for having two different names for diagrams!when I have to use calculator?I think before saving,right?
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